JPS56164300A - Evaluating method for breaking scale - Google Patents

Evaluating method for breaking scale

Info

Publication number
JPS56164300A
JPS56164300A JP6550080A JP6550080A JPS56164300A JP S56164300 A JPS56164300 A JP S56164300A JP 6550080 A JP6550080 A JP 6550080A JP 6550080 A JP6550080 A JP 6550080A JP S56164300 A JPS56164300 A JP S56164300A
Authority
JP
Japan
Prior art keywords
breaking
water level
area
pressure
liquid phase
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.)
Granted
Application number
JP6550080A
Other languages
Japanese (ja)
Other versions
JPS6331754B2 (en
Inventor
Koji Oga
Kosei Akiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6550080A priority Critical patent/JPS56164300A/en
Publication of JPS56164300A publication Critical patent/JPS56164300A/en
Publication of JPS6331754B2 publication Critical patent/JPS6331754B2/ja
Granted legal-status Critical Current

Links

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

Abstract

PURPOSE: To obtain the area and a location of the generation of breaking easily when there happens an accident of the loosing of a coolant on the basis of a coefficient of variation of pressure, a coefficient of variation of a water level and the second-order differential value of pressure, which are computed previously, and the relationship of the location and area of breaking in a vessel for a nuclear reactor, etc.
CONSTITUTION: When there happens an accident of the lost of a coolant, the relationship of the change of pressure and the change of a water level between scram time ts and a point of time tc when a main steam isolating valve is closed differs according to the case of the breaking of a liquid phase and the case of the breaking of the gaseous phase, and the lowering speed of a water level of the liquid phase obtained from the water level l is large and decompresssing speed acquired from pressure P is small in the breaking of the liquid phase. In the breaking of the gaseous phase, on the other hand, decompressing speed is large, and the lowering speed of the water level is small. When observing the time change of the water level after scram about the breaking of the liquid phase, a curve A is formed when the area of breaking is large and a curve B when the area of breaking is small, a line D shows a water level in case of closing of the main steam isolating valve, and the closing time of the isolating valve differs according to the area of breaking because the valve is closed by water-level signals.
COPYRIGHT: (C)1981,JPO&Japio
JP6550080A 1980-05-16 1980-05-16 Evaluating method for breaking scale Granted JPS56164300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6550080A JPS56164300A (en) 1980-05-16 1980-05-16 Evaluating method for breaking scale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6550080A JPS56164300A (en) 1980-05-16 1980-05-16 Evaluating method for breaking scale

Publications (2)

Publication Number Publication Date
JPS56164300A true JPS56164300A (en) 1981-12-17
JPS6331754B2 JPS6331754B2 (en) 1988-06-27

Family

ID=13288857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6550080A Granted JPS56164300A (en) 1980-05-16 1980-05-16 Evaluating method for breaking scale

Country Status (1)

Country Link
JP (1) JPS56164300A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126289A (en) * 1983-01-10 1984-07-20 株式会社日立製作所 Method of detecting rupture in reactor
JP2006097010A (en) * 2004-08-31 2006-04-13 Toho Chem Ind Co Ltd Cation-modified soy polysaccharide and cosmetic composition containing the same
JP2006117923A (en) * 2004-09-27 2006-05-11 Toho Chem Ind Co Ltd Cationic-modified psyllium seed gum and cosmetic composition containing the same
JP2007009092A (en) * 2005-06-30 2007-01-18 Toho Chem Ind Co Ltd Cationically modified gellan gum and cosmetic composition containing the same
JP2007039477A (en) * 2005-07-29 2007-02-15 Toho Chem Ind Co Ltd Cationically modified karaya gum and cosmetic composition containing the same substance
JP2007063479A (en) * 2005-09-01 2007-03-15 Toho Chem Ind Co Ltd Cation-modified gum arabic and cosmetic composition comprising the same
JP2007063446A (en) * 2005-08-31 2007-03-15 Toho Chem Ind Co Ltd Cation-modified xanthan gum and cosmetic composition comprising the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126289A (en) * 1983-01-10 1984-07-20 株式会社日立製作所 Method of detecting rupture in reactor
JPH0421838B2 (en) * 1983-01-10 1992-04-14 Hitachi Ltd
JP2006097010A (en) * 2004-08-31 2006-04-13 Toho Chem Ind Co Ltd Cation-modified soy polysaccharide and cosmetic composition containing the same
JP2006117923A (en) * 2004-09-27 2006-05-11 Toho Chem Ind Co Ltd Cationic-modified psyllium seed gum and cosmetic composition containing the same
JP2007009092A (en) * 2005-06-30 2007-01-18 Toho Chem Ind Co Ltd Cationically modified gellan gum and cosmetic composition containing the same
JP2007039477A (en) * 2005-07-29 2007-02-15 Toho Chem Ind Co Ltd Cationically modified karaya gum and cosmetic composition containing the same substance
JP2007063446A (en) * 2005-08-31 2007-03-15 Toho Chem Ind Co Ltd Cation-modified xanthan gum and cosmetic composition comprising the same
JP2007063479A (en) * 2005-09-01 2007-03-15 Toho Chem Ind Co Ltd Cation-modified gum arabic and cosmetic composition comprising the same

Also Published As

Publication number Publication date
JPS6331754B2 (en) 1988-06-27

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