ML20062C150
| ML20062C150 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 10/30/1978 |
| From: | Kalivianakis N COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NJK-78-656, NUDOCS 7811070118 | |
| Download: ML20062C150 (2) | |
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Comm:nw:alth Edison
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Cuad Cities Nuclear Power Station 22710 206 Avenue North Corcova, lilinois 61242 Telephone 309/654-2241 NJK-78-656 October 30, 1978 H. R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555
REFERENCE:
Quad-Cities Nuclear Power Station Docket No. 50-254, DPR 29, Unit 1 I
Docket No. 50-265, DPR 30, Unit 2
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Appendix A, Sections 3.8.B.3.c(1) and 3.8.B.3.b i
Dear Mr. Denton:
The purpose of this letter is to inform you, in accordance with i
Technical Specification 3.8.B.3.b, that the average release rate r
-j for radiolodine and radioactive materials in particulate form with l
half-lives greater than eight days during the calender quarter from July I to September 30, 1978, was 2.03 times the Technical Specification 3 8.8 3.c(1) design objective.
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The release rates were high at various times for different reasons during the course of.the quarter. The major problems occurred I
during July.
Leaks from seal rings on the suction and discharge i
l valves for the 1A reactor cleanup pump were found on July 5 and l
10.
Repairs were made on July 7 and 11, respectively.
In addition, a leak on the Unit 2 Reactor Cc,re Isolation Cooling (RCIC) System testable check valve was found on July 26 and was repaired on July
- 28. On September 19 a leak was found on a reactor water cleanup system valve, and was repaired the same day.
i initially, it was felt that the timely repair of the identified
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leaks and subsequent reduction in the iodine and particulate.
release rates from the reactor vent stack would be sufficient to l
l bring the total station release rate below the design objective.
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H. R. Denton October 30, 1978 When calculations indicated that the quarterly average r l the design objective, a detailed further investigationra e ease It was discovered that during July, the lodine and particulat was begun.
release rates.for the main chimney had increased by a factor of e
approximately two; however, this increase was masked by the more evident elevated release rates from the reactor vents.
increased release rate continued through the remainder of This quarter,' causing the design objective to be exceeded.
the A comprehensive evaluation of the elevated main c ease initiate proper corrective action.
gations and sampling will be reported to you In a follow up lettThe r e r.
Very truly yours, COMM0fNEALTH EDISON COMPANY QUAD-CITIES NUCLEAR POWER STATION 4
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N. J. Kallvianakis Station Superintendent NJK/RAF/lak l
cc:
M. S. Turbak L. Heuter, NRC Region lll l
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