ML19270F995
| ML19270F995 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/20/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 7904090329 | |
| Download: ML19270F995 (3) | |
Text
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,,8 UNITED STATES J
y*e f'
NUCLEAR REGULATORY COMMISSION I
j - x f ;j WASHINGTON, D. C. 20555 tkj$.[/
March 20,1979 Docket tio. 50-313 Mr. William Cavanaugh, III Executive Director, Generation and Construction Department Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203
Dear Mr. Cavanaugh:
To complete our review of the r.lectrical and instrumentation.
subsystems of the emergency core cooling system for single failure, we find additional information is needed to support our evaluation.
You are requested within 20 days of receipt of this letter to provide response to the enclosed request for additional infor-mation.
Sincerely,
)
b.'
Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors
Enclosure:
Request for Additional Information cc w/ enclosure:
See next page 7 9 ()/1 0 9 C Y
Arkansas Power & Light Company CC:
Phillip K. Lyon, Esquire House, Holns & Jewell 1550 Tower Building Li ttle Rock, Arkansas 72201 Mr. David C. Trimble flanager, Licensing Arkansas Power & Light Company Post Office Box 551 Li ttle Rock, Arkansas 72203 Mr. James P. O'Hanlon General Manager Arkansas Nuclear One Post Of fice Box 608 Russellville, Arkansas 72801 Mr. William Johnson i
U. S. Muclear Regulatory Commission P. O. Box 2090 Russelville, Arkansas 72801 Mr. Robert B. Borsum Babcock & Wilcox iluclear Power Generation Division Suite 420, 7735 Old Georgetown Road Bethesda, Maryland 20014 Arkansas Polytechnic Jollege Russellville, Arkansas 72801 4
Enclosure Request for Additional Information Concerning Electrical & Instrumentation Subsystems for ECCS Analysis for Arkansas Nuclear One - Unit 1 Docket No. 50-313 1.
Justify the qualification of Rotork submerged valve operators for valves CV-1050, CV-1410, CV-1414 and CV-1415 which were tested by the manu-facturer at 50 F (See AP&L letter dated January 20,1978) and which are required to perform submerged following a LOCA where the temperature of the flood water inside containment could be as high as 180*F.
2.
Document the information which was discussed on January 24,1979, con-cerning the service water return valves CV-3823 and CV-3824.
Include in this documentation the following:
Confirm there are two pressure indications inthe control room for each of the two service water pumps and piping systems and one or both these pressure switches alarm in the control room to indicate that the service water discharge line is closed.
3.
Submit a request for amendment which would provide Technical Specification requirements for all the service water system including the line up of the valves. Our part.cular concern is that CV-3823 and CV-3824 have specifications such that one valve should be required to open with the power to its operator removed. Also, since the one valve which is opened is considered,a potential single failure given an operator inadvertent closure, the Technical Specification should require the valve be verified open and the power to th.e operator verified removed at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
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