JPH0533759B2 - - Google Patents
Info
- Publication number
- JPH0533759B2 JPH0533759B2 JP61174999A JP17499986A JPH0533759B2 JP H0533759 B2 JPH0533759 B2 JP H0533759B2 JP 61174999 A JP61174999 A JP 61174999A JP 17499986 A JP17499986 A JP 17499986A JP H0533759 B2 JPH0533759 B2 JP H0533759B2
- Authority
- JP
- Japan
- Prior art keywords
- ventilation
- pool
- wind speed
- fuel
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009423 ventilation Methods 0.000 claims description 36
- 239000000446 fuel Substances 0.000 claims description 17
- 238000004378 air conditioning Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000003595 mist Substances 0.000 description 11
- 238000007664 blowing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Ventilation (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、原子力発電所の原子炉建屋燃料交換
床の換気空調方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for ventilating and air-conditioning a refueling floor of a nuclear reactor building in a nuclear power plant.
原子炉建屋燃料交換床においては、室内で発生
する熱や浮遊粒子等の除去あるいは希釈のために
換気空調装置が設けられ、新鮮空気を燃料交換床
に送風している。一般に、この装置の容量は室内
の放射能濃度と温度の許容値から定められている
が、この種の燃料交換床が大空間であることもあ
つて、換気装置自体が大型のものとなつている。
In the reactor building refueling floor, a ventilation air conditioning system is installed to remove or dilute heat and suspended particles generated indoors, and fresh air is blown to the fuel exchange floor. Generally, the capacity of this device is determined based on the allowable radioactivity concentration and temperature in the room, but since this type of fuel exchange floor is a large space, the ventilation device itself is large. There is.
換気機能は、換気回数および吹出風速に依存す
るが、従来は概略的な把握から、換気回数および
風速が第１図の領域Ｘで示すような換気回数およ
び低風速の領域がよいとされていた。 The ventilation function depends on the number of ventilations and the wind speed, but from a rough understanding, it was previously thought that a region with a low ventilation frequency and wind speed as shown in area X in Figure 1 is best. .
第２図および第３図に、従来の一般的な換気空
調方式を示した。すなわち、燃料交換床には原子
炉ウエル１および燃料貯蔵プール２が形成されて
いる。他方、このプール２の反対側の壁際には、
吹出用ダクト３に連つて多数の吹出口４，４…が
形成され、ここから大量の新鮮空気が吹出され、
プール２の同側の壁際の多数の吸込口５，５…か
ら吸込み、ダクト６を介して吸引し、処理してい
る。また、プール２の壁にも多数の吸込口７，７
…が形成され、プール２より蒸発する放射性ミス
トを吸引捕獲し、汚染空気の拡散防止を図つてい
る。８は機器仮置プールである。 Figures 2 and 3 show conventional general ventilation air conditioning systems. That is, a reactor well 1 and a fuel storage pool 2 are formed on the fuel exchange floor. On the other hand, on the opposite wall of this pool 2,
A large number of air outlets 4, 4... are formed adjacent to the air outlet duct 3, from which a large amount of fresh air is blown out.
Suction is carried out through a large number of suction ports 5, 5, . In addition, there are many suction ports 7, 7 on the wall of the pool 2.
... is formed and the radioactive mist that evaporates from the pool 2 is suctioned and captured to prevent the spread of contaminated air. 8 is a device temporary storage pool.
上述のように、従来の換気方法は換気回数が多
いため、換気装置が大きく、経済的でない。他方
で、プールの壁に設けられている吸込口７は、プ
ールからの蒸発ミストを積極的に吸込むには十分
といえない。また、吸込口７を設けた場合、プー
ル２からの蒸発湿分が水滴となつて吸込口７から
排気ダクト６に吸込まれる虞れがあるとともに、
床下に吸込口を形成せねばならないので、施工が
困難で経済的でない。
As mentioned above, the conventional ventilation method requires a large number of ventilations, requires a large ventilation device, and is not economical. On the other hand, the suction port 7 provided on the wall of the pool is not sufficient to actively suck in the evaporative mist from the pool. In addition, when the suction port 7 is provided, there is a risk that evaporated moisture from the pool 2 becomes water droplets and is sucked into the exhaust duct 6 from the suction port 7.
Since the suction port must be formed under the floor, construction is difficult and uneconomical.
そこで、本発明の目的は、換気装置を小型化す
るにもかかわらず、十分な換気能力を発揮できる
換気空調方法を提供することにある。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a ventilation air conditioning method that can exhibit sufficient ventilation capacity even though the ventilation device is downsized.
上記問題点を解決するための本発明は、原子炉
建屋燃料交換床の燃料貯蔵プールと反対側の壁際
に配置された吹出口から換気用空気を吹出し、燃
料貯蔵プールと同側の壁際に配置された吸込口か
ら吸込む換気空調方法において、換気回数および
吹出風速を添付図面第１図のゾーンＺ域内に設定
するとともに、燃料貯蔵プールのプール壁を通す
吸込みは行わないことを特徴とするものである。
In order to solve the above problems, the present invention blows out ventilation air from an outlet placed on the wall on the opposite side of the fuel storage pool on the fuel exchange floor of the reactor building, and places it on the same side of the wall as the fuel storage pool. In the ventilation air conditioning method, the number of ventilations and the blowing air speed are set within the zone Z region shown in Figure 1 of the attached drawings, and the suction is not carried out through the pool wall of the fuel storage pool. be.
本発明者らは、従来、概略的に良いと把握され
ていた換気回数および風速が、はたして適切であ
るのか検討したところ、換気回数を低下しても風
速を高めれば十分な換気機能を示すことを見出
し、本発明を完成した。すなわち、第１図の領域
Ｚ内では、換気回数が少くても、風速が高いと、
燃料貯蔵プールからの蒸発ミストの上昇流を抑え
込み、拡散が防止される。したがつて、プールの
吸込口を形成しなくとも、所要の機能を達成でき
る。
The present inventors investigated whether the ventilation frequency and wind speed, which were conventionally understood to be generally good, were actually appropriate, and found that even if the ventilation frequency was decreased, sufficient ventilation function could be achieved by increasing the wind speed. They discovered this and completed the present invention. In other words, in region Z of Figure 1, even if the number of ventilations is small, if the wind speed is high,
This suppresses the upward flow of evaporative mist from the fuel storage pool and prevents it from spreading. Therefore, the required function can be achieved without forming a pool suction port.
以下本発明を図面を参照しながらさらに詳説す
る。
The present invention will be explained in more detail below with reference to the drawings.
本発明者らは、換気回数および風速が換気機能
にどのように影響するか調べた。しかしながら、
実設備では試験が困難であるため、第２図および
第３図に示すような、実際の原子炉建屋燃料交換
床の縮尺1/10の相似模型を製作した。 The present inventors investigated how ventilation frequency and wind speed affect ventilation function. however,
Since it would be difficult to test with actual equipment, we created a 1/10 scale model of the actual reactor building refueling floor, as shown in Figures 2 and 3.
ここで言うところの相似模型とは、室内空気分
布を予測する方法として既に公知である、気流現
象を相似にする無次元数としてアルキメデス数
（Ar数）を一致させた模型を言い、具体的には
nθ・n〓／nu 2＝１ ……(1)
という基準の温度差（θ）、基準の長さ(l)、基準
の吹出風速(u)を縮率(n)で表した関係式、つまり相
似式に従つて作られた模型である。そして、本発
明では縮率の組合せとして
nθ＝１，ｎ＝１／√10，nu＝１／√10 ……(2)
を採用して模型を製作した。なお、上記模型の外
に、縮尺1/25の相似模型を製作、使用し、可視化
粉体を気流中に飛散させて目視観察結果を行つ
た。 The similar model referred to here refers to a model in which the Archimedean number (Ar number) is matched as a dimensionless number that makes airflow phenomena similar, which is already known as a method for predicting indoor air distribution. is nθ・n〓/n u 2 = 1... (1) The relationship between the reference temperature difference (θ), the reference length (l), and the reference blowing wind speed (u) expressed as the contraction ratio (n) It is a model created according to a formula, that is, a similar formula. In the present invention, the model was manufactured by adopting the following combination of reduction ratios: nθ=1, n=1/√10, n u =1/√10 (2). In addition to the above model, a similar model with a scale of 1/25 was manufactured and used, and visual observation results were conducted by scattering visualization powder into the airflow.
まず、縮尺1/10の模型にて温度分布を調べた。
第４図〜第６図はその結果を示したもので、第４
図は（）換気回数Ｃ＝2.3回／hr、吹出風速Ｖ
＝9.0ｍ／sec、第５図は（）換気回数Ｃ＝1.1
回／hr、風速Ｖ＝9.0ｍ／secのそれぞれの場合に
ついて、プール２の周辺の吸込口７の有と無との
場合のそれぞれ第３図Ａ〜Ｄ断面の温度分布を示
したものである。さらに、第６図は、（）参考
として、壁際の吸込口５を閉として、プール２の
周辺の吸込口７のみから排気した場合を示したも
のである。この（）の場合の換気回数は、（）
の場合と同じく、換気回数Ｃ＝2.3回／hr、風速
Ｖ＝9.0ｍ／secである。 First, we investigated the temperature distribution using a 1/10 scale model.
Figures 4 to 6 show the results.
The figure shows () ventilation frequency C = 2.3 times/hr, blowing wind speed V
=9.0m/sec, Figure 5 shows () ventilation frequency C=1.1
Figure 3 shows the temperature distribution in cross sections A to D in the presence and absence of the suction port 7 around the pool 2 for each case of wind speed V = 9.0 m/sec. . Furthermore, FIG. 6 shows (for reference) a case where the suction port 5 near the wall is closed and exhaust is exhausted only from the suction port 7 around the pool 2. In this case (), the ventilation frequency is ()
As in the case of , the ventilation frequency C = 2.3 times/hr and the wind speed V = 9.0 m/sec.
この結果によると、もし、プール２の周辺の吸
込口７がプールから蒸発するミストを直接捕獲し
ているのであれば、断面Ｄの温度は断面Ｃの温度
よりかなり高い値を示すはずであるが、殆んど差
異は認められない。このことは換気回数、風速を
種々変えた実験結果においても同様であつた。 According to this result, if the suction port 7 around the pool 2 directly captures the mist evaporating from the pool, the temperature of section D should show a much higher value than the temperature of section C. , almost no difference is observed. This was also the case in experimental results in which the ventilation frequency and wind speed were varied.
したがつて、プール２の周辺の吸込口７が室内
の温度に殆んど影響を与えないことが判る。しか
しながら、温度分布のみでは、蒸発ミストの挙動
を把握することが不十分である。 Therefore, it can be seen that the suction port 7 around the pool 2 has almost no effect on the indoor temperature. However, temperature distribution alone is insufficient to understand the behavior of evaporated mist.
そこで、縮尺1/25の相似模型に基づいて気流観
察を行つた。結果を第７図〜第１８図に示した。
その考案を次に示す。 Therefore, we conducted airflow observations based on a similar model at a scale of 1/25. The results are shown in FIGS. 7 to 18.
The idea is shown below.
(イ) 換気回数Ｃ＝2.3回hr；Ｖ＝15.0〜6.0ｍ／sec
（第７図〜第１０図）の場合は、プール周辺の
吸込口の有無に関係なく、吹出気流がプール面
上を覆うように進み、蒸発ミストを室内に上昇
拡散させない。(a) Ventilation frequency C = 2.3 times hr; V = 15.0 to 6.0 m/sec
In the case of (FIGS. 7 to 10), regardless of the presence or absence of suction ports around the pool, the blown air flow advances to cover the surface of the pool, and the evaporated mist does not rise and diffuse into the room.
(ロ) Ｃ＝0.8回／hr；Ｖ＝15.0ｍ／sec（第１３図お
よび第１４図）の場合、(イ)と同様である。(b) In the case of C = 0.8 times/hr; V = 15.0 m/sec (Figures 13 and 14), it is the same as (a).
(ハ) 2.3回／hr；Ｖ＝3.0ｍ／sec（第１１図および
第１２図）の場合、プール周辺の吸込口の有無
に関係なく、蒸発ミストが室内に上昇し、拡散
している。このことは、吹出風速が遅くなつた
ことにより、吹出気流がプール２に到達しなく
なつたためであると考えられる。またプール周
辺の吸込口の有無による室内気流分布の差異が
認められないことから、プール周辺に設けた吸
込口が本来の機能を十分に発揮していないこと
が確認された。(c) 2.3 times/hr; In the case of V=3.0 m/sec (Figures 11 and 12), the evaporated mist rises and spreads indoors regardless of the presence or absence of suction ports around the pool. This is considered to be because the blowing airflow no longer reaches the pool 2 due to the slowing of the blowing wind speed. Furthermore, since no difference was observed in the indoor airflow distribution depending on the presence or absence of suction ports around the pool, it was confirmed that the suction ports provided around the pool were not functioning to their full potential.
(ニ) Ｃ＝0.8回／hr、Ｖ＝3.0ｍ／sec（第１７図お
よび第１８図の場合、風量、風速とも小さいた
め、蒸発ミストの上昇拡散がみられる。また、
(ハ)と同様にプール周辺に設けた吸込口の効果が
認められない。(d) C = 0.8 times/hr, V = 3.0 m/sec (in the case of Figures 17 and 18, both the air volume and wind speed are small, so upward diffusion of the evaporated mist is observed. Also,
Similar to (c), the effect of the inlet installed around the pool cannot be recognized.
(ホ) 第１図のＺ領域以外のポイント、得に線l1よ
り下方についても気流観察を行つたが、いずれ
も蒸発ミストの上昇、拡散がみられた。(e) Airflow observations were also conducted at points other than the Z region in Figure 1, especially below the line l1 , and in all cases, rising and spreading of evaporated mist was observed.
このように従来の設計例より換気回数を減じ、
さらにプール周辺に設けた吸込口を撤去しても、
風速を速くすれば、十分蒸発ミストの上昇拡散を
防止できることが判つた。したがつて、この条件
を満せば、プール周辺の吸込口も不要であること
が判つた。 In this way, the number of ventilations is reduced compared to the conventional design example,
Furthermore, even if the suction ports installed around the pool are removed,
It has been found that increasing the wind speed can sufficiently prevent the upward spread of the evaporated mist. Therefore, it has been found that if this condition is met, there is no need for suction ports around the pool.
他方で、第１図のl2線より右方であつても、所
要の機能を果たすことができるが、換気回数を低
減する本発明の目的に反する。また、l3線の左方
でも蒸発ミストの上昇拡散を防止できるが、温度
環境維持のために新たな冷熱源を必要とするな
ど、経済的でなくなることと、放射能による汚染
防止上、懸念される領域であり、好適な範囲でな
い。 On the other hand, although a position to the right of the l2 line in FIG. 1 may still perform the required function, it is contrary to the purpose of the present invention to reduce the number of ventilations. Although it is possible to prevent the evaporative mist from rising and spreading to the left of the l3 line, it is not economical as it requires a new cooling source to maintain the temperature environment, and there are concerns about preventing radioactive contamination. This is not a suitable range.
さらに、l4線の上方でも効果があるが、この場
合、高風速となり、騒音、振動が発生する懸念が
あり、実用的な範囲でない。 Furthermore, although it is effective above the L4 line, in this case there is a concern that the wind speed will be high and noise and vibration will be generated, which is not a practical range.
したがつて、好適な範囲は領域Ｚ内である。 Therefore, the preferred range is within region Z.
以上の通り、本発明によれば、換気回数を低減
できるため、換気装置を小型化でき、経済的とな
り、またプール周辺（壁）の吸込口を形成しなく
とも足りるため、新設時の施工が容易となる。
As described above, according to the present invention, since the number of times of ventilation can be reduced, the ventilation system can be made smaller and more economical, and since there is no need to form a suction port around the pool (wall), construction at the time of new installation is easier. It becomes easier.
第１図は本発明の好適回数、風速範囲を示す相
関図、第２図は原子炉建屋燃料交換床の相似縮小
模型の平面図、第３図はその−線矢視図、第
４図〜第６図は実験結果の温度分布図、第７図〜
第１８図は気流観察結果図である。
１……原子炉ウエル、２……燃料貯蔵プール、
３……吹出用ダクト、４……吹出口、５，７……
吸込口、６……排気用ダクト、８……機器仮置き
プール。
Fig. 1 is a correlation diagram showing the preferred number of times and wind speed range of the present invention, Fig. 2 is a plan view of a similar scaled model of the reactor building fuel exchange floor, Fig. 3 is a view taken along the - line, and Figs. Figure 6 is a temperature distribution diagram of the experimental results, Figure 7~
FIG. 18 is a diagram showing the results of airflow observation. 1...Reactor well, 2...Fuel storage pool,
3...Blowout duct, 4...Blowout outlet, 5,7...
Suction port, 6...exhaust duct, 8...temporary equipment storage pool.
Claims (1)
対側の壁際に配置された吹出口から換気用空気を
吹出し、燃料貯蔵プールと同側の壁際に配置され
た吸込口から吸込む換気空調方法において、換気
回数および吹出風速を添付図面第１図のゾーンＺ
域内に設定するとともに、燃料貯蔵プールのプー
ル壁を通す吸込みは行わないことを特徴とする原
子炉建屋燃料交換床の換気空調方法。1. In the ventilation air conditioning method, ventilation air is blown out from an outlet located on the wall opposite to the fuel storage pool on the reactor building fuel exchange floor, and sucked in through an intake port located on the same side of the wall as the fuel storage pool. Check the ventilation frequency and blowout speed for Zone Z in Figure 1 of the attached drawing.
A ventilation and air conditioning method for a fuel exchange floor of a nuclear reactor building, characterized in that the ventilation and air conditioning method is set within a fuel exchange floor of a nuclear reactor building, and does not introduce suction through the pool wall of a fuel storage pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61174999A JPS6332394A (en) | 1986-07-25 | 1986-07-25 | Ventilation air-conditioning method in reactor housing fuel exchange bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61174999A JPS6332394A (en) | 1986-07-25 | 1986-07-25 | Ventilation air-conditioning method in reactor housing fuel exchange bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6332394A JPS6332394A (en) | 1988-02-12 |
| JPH0533759B2 true JPH0533759B2 (en) | 1993-05-20 |
Family
ID=15988444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61174999A Granted JPS6332394A (en) | 1986-07-25 | 1986-07-25 | Ventilation air-conditioning method in reactor housing fuel exchange bed |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6332394A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8948334B2 (en) * | 2005-10-31 | 2015-02-03 | General Electric Company | System and method for testing the steam system of a boiling water reactor |
-
1986
- 1986-07-25 JP JP61174999A patent/JPS6332394A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6332394A (en) | 1988-02-12 |
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