ML19318B892
| ML19318B892 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 06/18/1980 |
| From: | Youngblood B Office of Nuclear Reactor Regulation |
| To: | Ferguson J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8006300259 | |
| Download: ML19318B892 (5) | |
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UNITED STATES 3"
NUCLEAR REGULATORY COMMISSION
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JUN i c 1980
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Docket No.:
50-339 Mr. J. H. Ferguson Executive Vice President - Power Operations Virginia Electric & Power Company P. O. Box 26666 Richmond, Virginia 23261
Dear Mr. Ferguson:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW 0F THE NORTH ANNA POWER STATION, UNIT 2 FINAL SAFETY ANALYSIS REPORT (FSAR)
As a result of our continuing review of the North Anna FSAR, we find that we need additional information to complete our evaluation. The specific informa-tion required is related to branch technical position RSB 5-1 and is listed in the enclosure.
Our review schedule is based on the assumption that this additional information will be available for our review by June 30, 1980.
If you cannot meet this date, please inform us within seven days after receipt of this letter so that we may revise our schedule accordingly.
Please contact Alexander Dromerick, Licensing Project Manager, North Anna Power Station, Unit 2, if you desire any discussion or clarification of the enclosed t
request. Mr. Dromerick may be reached at 301/492-7100.
Sincerely, B. J. Youngblood, Chief Licensing Branch No. 1 Division of Licensing
Enclosure:
Request for Additional Information cc-w/ enclosures:
See next page f
sooesoo 251
Mr. J. H. Ferguson Executive Vice President - Power Operations Virginia Electric & Power Company P. O. Box 26666 Richmond, Virginia 23261 cc:
Mr. Anthony Gambaradella Clarence T. Kipps, Jr., Esq.
Office of the Attorney General 1700 Pennsylvania Avenue, N.W.
11 South 12th Street - Room 308 Washington, D. C.
20006 Richmond, Virginia 23219 Carroll J. Savage, Esq.
Richard M. Foster, Esq.
1700 Pennsylvania Avenue, N.W.
Musick, Williamson, Schwartz Washington, D. C.
20006 Leavenworth & Cope, P. C.
P. O. Box 4579 Mr. James C. Dunstan Boulder, Colorado 80306 State Corporation Comission Comonwealth of Virginia Michael W. Maupin, Esq.
Blandon Building Hunton, Williams, Gay & Gibso.
Richmond, Virginia 23209 P. O. Box 1535 Richmond, Virginia 23212 Alan S. Rosenthal, Esq.
Atomic Safety and Licensing Appeal Board Mrs. June Allen U.S. Nuclear Regulatory Comission 412 Owens Drive Washington, D. C.
20555 Huntsville, Alabama 35801 Michael C. /arrar, Esq.
Mrs. James Torson Atomic Safety and Licensing Appeal Board 501 Leroy U.S. Nuclear Regulatory Comission Socorro, New Mexico 87801 Washington, D. C.
20555 Mrs. Margaret Dietrich Dr. John H. Buck Route 2, Box 568 Atomic Safety and Licensing Appeal Board Gordonsville, Virginia 22942 U.S. Nuclear Regulatory Comission Washington, D. C.
20555 William H. Rodgers, Jr., Esq.
Georgetown University Law Center Atomic Safety and Licensing Board Panel 600 New Jersey Avenue, N. W.
U.S. Nuclear Regulatory Commission Washington, D. C.
20001 Washington, D. C.
20555 Mr. Peter S. Hepp Mr. Michael S. Kidd Executive Vice President U.S. Nuclear Regulatory Comi;sion Sun Shipping & Dry Occk Company P. O. Box 128 P. O. Box 540 Spotsivania, Virginia 22553 Chester, Pennsylvania 19013 Dr. Paul W. Purdom Mr. R. B. Briggs Department of Civil Engineering Associate Director Drexel University 110 Evans Lane Philadelphia, Pennsylvania 19104 Oak Ridge, Tennessee 37830
.O.
Mr. J. H. Ferguson cc: Dr. Lawrence R. Quarles Apartment No. 51 Kendal-at-Longwood Kennett Square, Pennsylvania 19348 Mr. Irwin R. Kroot Citizens Energy Forum P. O. Box 138 McLean, Virginia 22101 James B. Dougherty, Esq.
Potomac Alliance 1416 S Street, N.W.
Washington, D. C.
20009 W. R. Cartwright, Station Manager P. O. Box 402 Minerr', Virginia 23117 W. L. Stewart, Manager P. O. Box 315 Surry, Virginia 23883 I
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REQUEST FOR ADDITIONAL INFORMATION NORTH ANilA POWER STATION, UNIT 2 DOCKET N0; 50-339 BRANCH TECHNICAL POSITION RSB3-1 The following questions are referenced to the North Anna submittal of March 20, 1980 (C. M. Stallings, VEPCO, to H. R. Denton, NRC).
Where discussion involves required operator actions, identify times and feasibility of the action (s).
9.
Question 5 in the referenced submittal included a comparative analysis n
of natural circulation capability between North Anna 2 and Diablo Canyon The analysis as presented does not address upper head effects.
The concern is that inadequate cooling of the upper head may produce thermal stresses with adverse consequences, particularly around the vessel flange.
Show that the Diablo Canyon tests would be applicable to North Anna in addressing this concern.
10.
The response to Question 1 has discussed the air supplies for the safety grade atmospheric dump valves.
Identify any other valves needed to achieve or maintain cold shutdown which require an air supply.
Discuss air supply failures in these valves.
Identify operator actions which would be taken and estim{te tiniel req'uired to perform. _ [
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the actions.
Discuss any time or environmental restraints imposed by reactor condition which might dictate action time requirements.
11.
Discuss qualification of the RHR system.
Show that all active components (including necessary instrumentation) in the system are qualified to operate in the worst environment for scenarios identified in the reference submittal (moderate temperature,100% humidity).
For example, the reference submittal and subsequent discussions have suggested that RHR suction isolation vaive motor operators have been qualified for 100% humidity and at least 250 F, an environment which envelopes that for any of the postulated scenarios.
i 12.
Identify the control room alarm (s) which is (are) provided to alert l
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12.
the operator to a loss of flow in the RHR system.
Discuss the i
(Continued) jf scenarios of a~ spurious closure of either RHR suction isolation i
i valve or the RHR flow control valve from event initiation to i
RHR flow restoration.
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