ML20140H908

Forwards RAI to Complete Review on SFP Regulatory Analysis for Plant,Units 1 & 2.Request That Info Be Provided within 30 Days from Ltr Date

ML20140H908
Person / Time
Site:	Hatch
Issue date:	05/09/1997
From:	Jabbour K NRC (Affiliation Not Assigned)
To:	Sunmer H SOUTHERN NUCLEAR OPERATING CO.
References
TAC-M98303, NUDOCS 9705130319
Download: ML20140H908 (4)

Text

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i May 9, .1997 Mr. H. L. Sumner, Jr.

L Vice President.

Southern Nuclear Operating i Company, Inc.  ;

P. O. Box 1295 1 Birmingham, Alabama 35201-1295 l l l

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON THE SPENT FUEL POOL REGULATORY ANALYSIS - EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 l (TAC NOS. M98303.AND M98304) j

Dear Mr. Sumner:

As a followup to our meeting with your staff at the Hatch site on April 9 and 10, 1997, we find that additional information, in response to the comments outlined in the enclosure, is needed to enable the NRC staff to complete its review of the spent fuel pool regulatory analysis for the Hatch Units 1 and 2. ,

We request that you provide the additional information within 30 days from the date of this letter. If you have any questions, please contact me at (301) 415-1496.

Sincerely, ORIGINAL SIGNED BY: '

i Kahtan N. Jabbour, Senior Project Manager l Project Directorate II-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366 j 1

Enclosure:

As stated cc w/ enc 1: See next page Distribution:

Docket File '

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V OGC ACRS JJohnson, RII CCasto, RII 9705130319 970509 PDR ADOCK 05000321 P PDR To receive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure "E" = Copy Nith attachment / enclosure n"M" = No copy 0FFICE PM:PDII-2 16 LA:PDIIV M SC:SPLB ], D:PDIl-i "' V l NAME KJabbour:cn W T LBerry k(P GHubbard W HBerkow , /

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j* NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. maa -j

% May 9,1997 Mr. H. L. Sumner, Jr.

Vice President Southern Nuclear Operating Company, Inc.

P. O. Box 1295 '

Birmingham, Alabama 35201-1295

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON THE SPENT FUEL POOL REGULATORY ANALYSIS - EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 (TAC NOS. M98303 AND M98304) ,

Dear Mr. Sumnor:

As a followup to our meeting with your staff at the Hatch site on April 9  ;

and 10, 1997, we find that additional information, in response to the comments outlined in the enclosure, is needed to enable the NRC staff to complete its i review of the spent fuel pool regulatory analysis for the Hatch Units 1 and 2. 1 We request that you provide the additional information within 30 days from the  !

date of this letter. If you have any questions, please contact me at (301) 415-1496. i Sincerely, C Jo. J. T L Kahtan N. Jabbour, Senior Project Manager Project Directorate 11-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation l

Docket Nos. 50-321 and 50-366

Enclosure:

As stated cc w/ enc 1: 5ee next page 4 -a

- - - . _ . _ _ _ _ _ . . _ _ _ _ _ ____.-._ _ _ _ _ = _ - _ - - - - _ ,

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i <

l Edwin I. Hatch Nuclear Plant j Units 1 and 2 cc:

• Mr. Ernest L. Blake, Jr. Mr. Thomas P. Mozingo Shaw, Pittman, Potts and Trowbridge Program Manager 2300 N Street, NW. Nuclear Operations Washington, DC 20037 Oglethorpe Power Corporation' 2100 East Exchange Place Mr. D. M. Crowe P. O. Box 1349 Manager, Licensing Tucker, Georgia 30085-1349 Southern Nuclear Operating Company, Inc. Charles A. Patrizia, Esquire P. O. Box 1295 Paul, Hastings, Janofsky & Walker Birmingham, Alabama 35201-1295 10th Floor 1299 Pennsylvania Avenue Resident Inspector . Washington, DC 20004-9500 U.S. Nuclear Regulatory Commission

, 11030 Hatch Parkway North Chairman Baxley, Georgia 31513 Appling County Commissioners County Courthouse Regional Administrator, Region II Baxley, Georgia 31513 U.S. Nuclear Regulatory Commission Atlanta Federal Center Mr. W. G. Harriston, III 61 Forsyth Street, S.W., Suite 23T85 President and Chief Executive Atlanta, Georgia 30303 Officer Southern Nuclear Operating

- Mr. Charles H. Badger Company, Inc.

Office of Planning and Budget P. O. Box 1295 Room 610 Birmingham, Alabama 35201-1295 270 Washington Street, SW.

Atlanta, Georgia 30334 Mr. J. D. Woodard Executive Vice President Harold Reheis, Director Southern Nuclear Operating Department of Natural Resources Company, Inc.

205 Butler Street, SE., Suite 1252 P. O. Box 1295 ,

Atlanta, Georgia 30334 Birmingham, Alabama 35201-1295 i Steven M. Jackson Mr. P. W. Wells Senior Engineer - Power Supply General Manager, Edwin I. Hatch Municipal Electric Authority Nuclear Plant of Georgia Southern Nuclear Operating -

1470 Riveredge Parkway, NW Company, Inc.

Atlanta, Georgia 30328-4684 11030 Hatch Parkway North Baxley, Georgia 31513 l

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4-, m , , --

l i

i l REQUEST FOR ADDITIONAL INFORMATION i EDWIN I. HATCH NUCLEAR PLANT. UNITS 1 AND 2 i

j. DOCKET NOS. 50-321 AND 50-366 1

(1) For'those components in the' Unit 1 Reactor Building (RB), does your Environmental Qualification (EQ) list (Central File) include mild environment safety-related equipment? If not, it is conceivable that safety-related equipment designated " mild" and located in the Unit 1 RB

.could be exposed to an environment that exceeds their design due to a sustained pool boil. This equipment may have been overlooked because they were not identified using the search criteria you described (i.e.,

if they were mild environment equipment, they may not be on you EQ list). ,

(2) What is the function of the DP switch (es) 1(2)T46-DPT-N005A(&D) (other' than to provide indication to the control room recorders)? If the switch were to fail, would their failure affect other adjacent safety-related equipment (electrically)? Is adequate fault protection provided on the equipment's power supply circuit in the event of an electrical failure?

(3) Will the spent fuel pool (SFP) boiling produce high radiation levels on the refueling floor (RF) before significant inventory boil-off? If so, what is the expected source of high radiation levels on the RF during a '

boiling event (prior to any significant lowering of pool level), and what radiation levels do you expect at various points during a pool boiling event (in ur/hr)?

(4) Standby gas treatment system equipment may be required to transport hot, humid RF vapor during a pool boiling event. Provide a discussion of the performance of the standby gas treatment system (SGTS) under boiling spent fuel pool conditions. Include the length of time the system could be expected to function assuming that the recovery of spent fuel cooling systems are uncertain (i.e., extended feed and boil cooling).

(5) Provide a discussion of the capability of the building drain collection system (s) under SFP boiling conditions. For ease of analysis and conservatism, assume that 100 percent of boil-off condenses on the RB walls and is directed to the floor drainage system. Where does this drainage system collect? What is the capacity of the sump, pump, and the processing system? Does the pump have a safety-related power supply? If the pump were to fail (or be overwhelmed), is there any safety-related equipment in the vicinity that may experience flooding?

How long would it take to threaten this equipment?

Enclosure