ML20084K155
| ML20084K155 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 09/03/1974 |
| From: | Kalivianakis N COMMONWEALTH EDISON CO. |
| To: | Oleary J US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NJK-74-259, NUDOCS 8305190182 | |
| Download: ML20084K155 (2) | |
Text
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Post Ott.cc Box 216 j'/ Cordova, Illinois 61242 v
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6 SEP1019N.-8 September 3, 1974 gs Q,l' ;/
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i Mr. J. F. O' Leary, Director N1
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Directorate of Licensing m
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U. S. Atomic Energy Commission Washington, D. C.
20545
Reference:
Quad-Cities Nuclear Power Station Units 1 and 2, Docket Numbers 50-254 and 50-265, DPR-29 and 30, Appendix B, Section 1.1 and 3.1. A.
Dea r Mr. O ' Le a ry :
The purpose of this letter is to report Chlorine Residual Concentrations in the discharge bay which exceeded Technical Specification Section 1.1.A, Appendix B, Non-Radiological Technical Specificatione.
This limit of 0.10 ppm free and combined chlorine residuals in the discharge bay was exceeded on the following dates:
Date Maximum, Concentration, pom 8-5-74 0.20 8-23-74 0.40 8-28-74 0.57 The rerouting of the hypochlorite flush line as mentioned in previous letters apparently has not completely solved the problem of excessive chlorine residuals.
It does appear, however, that it has changed the situation such that further investigations are needed to explain and control the problem.
These invcstigations are in progress.
In three of the four i
chlorinations-monitored since the flush line was rerouted, higher residuals were found during the injection cycle than were found during the flush cycle.
This is contrary to the findings prior to having the flush line rerouted, wherein higher residuals were found during the flush cycle.
The actual Technical Specification limit was exceeded during both cycles on these occasions with exception of the flush cycle on August 28, 1974.
Revised Technical Specifications have been issued effective August 30, 1974 which include a higher limit for chlorine i
residual concentration.
The occurrences reported by this IQY g40 8305190182 74o903 b
DR ADOCK 05000254 O[.(-[O g
PDR COPY SkNr REGION a
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.s Mr. J. F. O' Leary September 3, 1974 letter are within these new limits.
Our investigations into the chlorination problem will continue, even though the new limits are higher, to provide assurance that we have an effective chlorination program and do not adversely affect the environs through the application of this program.
Very truly yours, COMMONWEALTH EDISON COMPANY Quad-Cities Nuclear Power Station
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/Y',L'kl{f N. J. Kalivianakis I
Station Superintendent NJK/zr cc:
Region III, Directorate of Regulatory Operation's J.
S. Abel
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