ML14188B771
| ML14188B771 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 04/08/1981 |
| From: | Michelson C NRC Office for Analysis & Evaluation of Operational Data (AEOD) |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML14188B772 | List: |
| References | |
| NUDOCS 8104150056 | |
| Download: ML14188B771 (3) | |
Text
APR 8 1981 MEMORANDUM FOR:
Harold R. Derton, Director Office of Nuclear Reactor Regulation FROM:
Carlyle Michelson, Director Office for Analysis and Evaluation of Operational Data
SUBJECT:
H.B. ROBINSON RCS LEAK ON JANUARY 29, 1981 The Engineering Evaluation Report for the Robinson event is enclosed for your information and consideration. The primary reason for the evaluation was.the loss of approximately 6,000 gallons of reactor coolant water from two separate leaks.in the letdown train of the Chemical and Volume Control Letdown System (CVCS).
The evaluation of the event did not identify any safety concerns or any reuied immediate actions by the.NRC., There are four areas, however, which are referred to NRR for your consideration. These include:
- 1. Whether a requirement should be placed upon operating plants to establish a procedure for identification and recovery from a spurious safety injection actuation (if such a procedure is not already in place).
- 2. Whether criteria for terminating SI should include provisions for isolating charging since charging flow could.be.considered high pressure safety injection for very small breiks.
- 3. Whether there.is a need for a direct reactor.trip on a spurious safety injection actuation at other Westinghouse plants which do not have a direct trip.
- 4. Whether operation of the isolation 4alves in the CVCS at Robinson is causing.the system to be operated in a manner which is contrary to its design bases.
810 4 1500StP OFFICEr
.f SURNAME DATE NRC FORM 318 10/80) NRCM O240 OFFICIAL RECORD COPY USGPO: 1980-329-824
Harold R. Denton
- 2 Since these areas have been identified for information, a written response is not requested. No additional AEOD action is anticipated.
This event and the operator's response is a good example of an operating experience which should be disseminated to other licensees for information and training purposes. We have proposed this event to be included in Power Reactor Events.
Original Signed by Carlyle Michelson Carlyle Michelson, Director Office for Analysis and Evaluation of Operational Data
Enclosure:
Engineering Evaluation Report for H.B. Robinson cc w/enclosure:
See Distribution Distribution:
Central File AEOD Reading File AEOD Chron. File WLanning, AEOD CMichelson, AEOD C. J. Heltemes, AEOD E. Brown, AEOD M. Chiramal, AEOD OFFICE)
E AEOD AEOD
.SURNAME)
WLan..gt CJHtemes MChirama CMichelson DATE)
- 32. /
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3/3 /81 3//.
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NRC FORM 318 (10/80) NRCM 0240 OFFICIAL RECORD COPY v USGPO: 1980-329-824
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