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Heavy water pumps; Pumpe D{sub 2}O

Abstract

Continuous increase of radiation intensity was observed on all the elements in the heavy water system during first three years of RA reactor operation. The analysis of heavy water has shown the existence of radioactive cobalt. It was found that cobalt comes from stellite, cobalt based alloy which was used for coating of the heavy water pump discs in order to increase resistance to wearing. Cobalt was removed from the surfaces due to friction, and transferred by heavy water into the reactor where it has been irradiated for 29 876 MWh up to 8-15 Ci/g. Radioactive cobalt contaminated all the surfaces of aluminium and stainless steel parts. This report includes detailed description of heavy water pumps repair, exchange of stellite coated parts, decontamination of the heavy water system, distillation of heavy water. [Serbo-Croat] U toku prve tri godine eksploatacije reaktora RA uocen je neprekidni porast intenziteta zracenja na svim elementima u teskovodnom sistemu. Analizom teske vode utvrdjeno je postojanje radioaktivnog kobalta. Ustanovljeno je da kobalt potice od stelita, legure na bazi kobalta kojim su presvuceni rukavci vratila teskovodnih pumpi radi otpornosi na habanje. Kobalt je trenjem skidan sa povrsina, u toku rada prenosen je teskom vodom u reaktor i ozracivan  More>>
Publication Date:
Dec 15, 1963
Product Type:
Miscellaneous
Report Number:
INIS-CS-0096; RA-214/R3/P3/56
Resource Relation:
Other Information: 6 tabs, 6 figs, 7 refs
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; COBALT ISOTOPES; CONTAMINATION; DECONTAMINATION; DISTILLATION; HEAVY WATER; LEADING ABSTRACT; PUMPS; R-A REACTOR; REACTOR COOLING SYSTEMS; REPAIR; STELLITE
OSTI ID:
20743606
Research Organizations:
Institute of Nuclear Sciences Boris Kidric, Vinca, Beograd (Serbia and Montenegro)
Country of Origin:
Serbia and Montenegro
Language:
English
Other Identifying Numbers:
TRN: CS06RA456052906
Availability:
Available from INIS in electronic form; Also available from the Institute of nuclear sciences Vinca
Submitting Site:
INIS
Size:
149 pages
Announcement Date:
Jul 03, 2006

Citation Formats

Zecevic, V, and Nikolic, M. Heavy water pumps; Pumpe D{sub 2}O. Serbia and Montenegro: N. p., 1963. Web.
Zecevic, V, & Nikolic, M. Heavy water pumps; Pumpe D{sub 2}O. Serbia and Montenegro.
Zecevic, V, and Nikolic, M. 1963. "Heavy water pumps; Pumpe D{sub 2}O." Serbia and Montenegro.
@misc{etde_20743606,
title = {Heavy water pumps; Pumpe D{sub 2}O}
author = {Zecevic, V, and Nikolic, M}
abstractNote = {Continuous increase of radiation intensity was observed on all the elements in the heavy water system during first three years of RA reactor operation. The analysis of heavy water has shown the existence of radioactive cobalt. It was found that cobalt comes from stellite, cobalt based alloy which was used for coating of the heavy water pump discs in order to increase resistance to wearing. Cobalt was removed from the surfaces due to friction, and transferred by heavy water into the reactor where it has been irradiated for 29 876 MWh up to 8-15 Ci/g. Radioactive cobalt contaminated all the surfaces of aluminium and stainless steel parts. This report includes detailed description of heavy water pumps repair, exchange of stellite coated parts, decontamination of the heavy water system, distillation of heavy water. [Serbo-Croat] U toku prve tri godine eksploatacije reaktora RA uocen je neprekidni porast intenziteta zracenja na svim elementima u teskovodnom sistemu. Analizom teske vode utvrdjeno je postojanje radioaktivnog kobalta. Ustanovljeno je da kobalt potice od stelita, legure na bazi kobalta kojim su presvuceni rukavci vratila teskovodnih pumpi radi otpornosi na habanje. Kobalt je trenjem skidan sa povrsina, u toku rada prenosen je teskom vodom u reaktor i ozracivan u toku 29 876 MWh do specificne aktivnosti 8-15 Ci/g. Radioaktivni kobalt je kontaminirao sve povrsine od aluminijuma i nerdjajuceg celika. Ovaj izvestaj sadrzi detaljan opis remonta pumpi, zamene delova teskovodnih pumpi novim delovima bez stelitnog sloja, dekontaminacije teskovodnog sistema, destilacije teske vode.}
place = {Serbia and Montenegro}
year = {1963}
month = {Dec}
}