ML19329A586
| ML19329A586 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 11/17/1971 |
| From: | Robert Carlson US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8001070582 | |
| Download: ML19329A586 (2) | |
Text
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UNITED STATES jb 7 h if h
ATOMIC ENERGY COMMISSION I ',I - A
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1 WASWNGTON, D.C. 20545 erun November 17, 1971
. Schwencer, Chief, PWR Pro,)ect Branch #h, DRL OCONEE 1 - CONTAINMENT LEAK RATE TIET (CLRT)
A routine inspection of Oconee 1 was conducted on November 11 and 12, 1971. During the inspection, information was developed which, in our opinion, indicates that the Oconee CLRT was conducted under conditions which cause the test results to be invalid.
We understand that you are currently evaluating the adequacy of the Oconee 1 CLRT results.
In our view, the new information4 jwhich wasn't discussed in the licensee's submittal on the CLRP1, will effect your conclusions. Mindful of the impact on the licensee of an unfavorable finding and to expedite your review, an advance summary of our inspection findings are enclosed for your information and possible action.
We would be interested in your views on this new information and shall be pleased to discuss it with you if you wish.
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'l d t.,u R. T. Carlson, Acting Chief, Reactor Testing and Operations Branch Division of Compliance cc:
R. C. DeYoung, DRL J. G. Davis, CO:II N. Moseley, 00:II W. S. Farmer, CO 1_/ Duke Power Company Report dated b
October 29,-1971 i
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1 OCONBE 1 CONTAIUMENT LFAK IMTE TIIIT
. The fo:llowing, summry information, which 'vasn't discuss report of CLRT results, was developed by Region II (Atlanta) d
-inspection of Oconee El on' November 10 and 11,1971. uring an d.
Strongback clamps : vere attached to both the inner and emergency. escape airlock doors.
outer
. There -is no information available as to the amount-of force these clamps exerted i forcing the doors against the resilient gaskets n
- vere installed during the performnce of an over-pressure The clamps and 59 psA3,-respectively. strength test and a leak rate test performance of-the containment leak rate test (CLRT)The sg 2.
Identified leaks were not adequately corrected prior t
. g the CLRT..
storage system was closed for the test.A normally open ma o performing t-licensee) done because check valves, CS-11 and 12This was reportedly leaking excessively and repairs had not been ma
, were known ests to be 3
'Ihe steam lines out to the turbine stop valves were in the test. Since ste not included
. operational occurrence,am generator leakage is an anticipated be considered as part of the containment boundaryit is ou
- 4.. The' CLRT procedure did not require that isolation valves using their normal (electric motor or air) closure mechanis e closed No written evidence is available to substantiate that t ms.
closure mechanisms were used; althou6h, the Duke Test C e norm 1
. said that, to the best of his. knowledge, they were used. In oordinator a specific prohibition against additional man c of is of concern. -
In' our view, the last factor is disquieting but a ves not ~cufficiently definitive to be used to determine that th was inadequate.
e test normal manner in an inspection report.The informtion in this e
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