ML19257D296
| ML19257D296 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 01/22/1980 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Hancock J FLORIDA POWER CORP. |
| References | |
| NUDOCS 8002040040 | |
| Download: ML19257D296 (2) | |
Text
T E R. 4 pm
(($"e (,
'o, UNITED STATES j
NUCLEAR REGULATORY COMMISSION
/
f WASHINGTON, D. C. 20555
Dear Mr. Hancock:
SUBJECT:
REQUEST FOR INFORMATION ON THE EFFECTS OF CERTAIN VALVE LINE-UP PROCEDURAL CHANGES Based upon design review, we have detemined that Arkansas 1, Crystal River 3, Oconee 1, 2, and 3, Rancho Seco and Three Mile Island 1 have two check valves in series with a closed motor operated valve (MOV) to isolate the low pressure safety injection system from the reactor coolant system. We have recently completed a study of this configuration (0conee) and its contribution to the risk of core nelt.
The results show a higher value contribution to the risk of core nelt from a loss of coolant accident cutside of containment than previously found for Surry (WASH-1400).
We are studing this matter and pursuing in. erin and permanent resolutions.
The permanent fix, which is being addressed as part of the review of your Inservice Testing Progran, requires a leak test of the check valves or an equivalent test. The proposed interim resolution seeks to p. ace the check valves under continuous test by requiring that the plant be started up and operated with the MOV open.
Before we adopt this temporary fix, we wish to be assured that this interim approach carries no unacceptable adverse safety impact.
We have, in the past, discussed the following questions with members of your staff:
1.
What is the adverse safety impact of starting up the plant with the MOV in the open position?
2.
What is the adverse safety impact of operating the plant with the MOV in the open position?
In order to assess the impact of the proposed M0V position and to allow your comments to be considered prior to our resolution of this issue, kindly submit your response to the two questions above within 45 days of receipt of this letter.
1864 157 Sincerely, O
'l D
gdvVks.t hd Rooert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors cc:
See next page 8002040 0 0
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Florida Power Corporation cc: !!r. S. A. Brandimore Vice President and General m
Counsel P. O. Box 14042
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St. Petersburg, Florida 33733
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Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Crystal River Public Library Crystal River, Florida 32629
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Mr. Jack Shreve Office of the Public Counsel Room 4, Holland Building Tallahassee, Florida 32304 1864 158
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