SU1292810A1 - Method of cleaning gas from compounds containing radioactive iodine - Google Patents

Abstract

The invention relates to the field of gas cleaning and makes it possible to increase the degree of i.p. cleaning from compounds containing radioactive iodine. Gas containing iodine-131. It is passed for 14 hours through three layers of impregnated activated carbon, the first of which is impregnated with silver nitrate, the second with lead iodide, and the third with hexamethylene tetramine. The integral gas cleaning ratio is 10. The absorbed amount of iodine is 10.8 Ci. 1 hp f-ly. GcheE SO Yu oo o

Description

The invention relates to a method for the purification of gases and can be used to purify emissions of nuclear reactors in nuclear power plants from iodine radionuclides.

The aim of the invention is to increase the degree of gas purification from compounds containing /. radioactive iodine.

The method is carried out as follows.

Example 1. The cleaning of gases is carried out in an adsorber through three layers of green activated carbon:

1 layer - - 50 kg of coal SKT-3, Hviiipei ii Mpora with silver nitrate;

2 layer - 50 kg of coal SKT-- 3, imnregniro

bath lead iodide;

3 layer - - 100 kg of coal SKT-3, impregnated by the hectare CC and m

Mr. (gmta).

Gaseous waste content

iodine-131, served on the code of the specified adsorber for 14 hours. The integral gas purification coefficient, defined as; the years of the total activity of iodine entering the adsorber during the entire period of its operation, to the total activity of iodine the adsorbent for the same period is 10. The absorbed amount of iodine -131 is 10.8 Ci.

Example 2. Gaseous wastes containing iodine-131 are passed through an adsorber, the CONDITION of four layers:

1 layer - 50 kg of coal SKT --- 3. primprepirovano11O | -o nitric oxide; 1b m silver

2 layer - 50 kg of coal SKT-3, imnre ii) porcine iodide;

3 layer - 50 kg of carbon SKT-3, nmrcpaeted with barium iodide;

4 layer --- 50 kg of corner, 1 CKT 3. Immune

ganta bath.

Ideal) 1Y purification factor for 30 hours of operation of the adsorber is 200. The absorbed amount of iodine-131 is 13.8Ki.

Example 3. V two columns with a total length of the working layer of 100 mm, divided into 50 mm each section of 50 mm each: with labeled iodine LZ iodide metal. Concentration met1: Tyodide IIP, the entrance to both columns is 1 MKI / M. The velocity of the gas flow is four times less; 1: 30 cm / s. FSo second section (hanoi from the columns additionally serves as a flue from the winner pair of stable iodine air in the amount of 0.9 l / min (to the volume of the first Azov stream)

.. 1 liter; 1 news, experience 4 hours. Rel. Elpa (.. air quality 70%,. Calculated: nny

K) overshoot 1i.rez: 5a dny layer cleaning coefficient i-a: ia: in the supply column with iodine and in the column without supply / leaves 320 and 40.

Formulas and and: -: define

1. The method of purification of ha: 5ov from compounds, soda radioactive iodine. their p | H) 11C 4C i; e: i layers of imp) Egpyr () VanPoy activated carbon. 1I, O with a degree of high purity. : ii) onecc of the osu1stv; 1 are in the presence of stable iodine in between the layers of coal.

2. Slyusob NS. Section 1. About the fact that between Y with s; 1 s mi with iodine-containing 1 ILM with air; -1,: 1 and form:}; with a death (yo-containing state; 1 penalty for activated u : l.

Claims (2)

1. The method of purification of gases from compounds containing radioactive iodine. by passing them through layers of impregnated activated carbon, characterized in that du, in order to increase the degree of purification, iponecc is carried out in the presence of stable iodine in the gas phase between the layers of coal. 2. The method according to and. 1. characterized in that iodine between the layers is introduced with iodine-containing air or formed by the decomposition of the nodo-containing compound on activated carbon.