ML20217Q674

Forwards Request for Addl Info Re Recirculation Spray Sys Directly Injecting Into Reactor Coolant Sys

ML20217Q674
Person / Time
Site:	Millstone
Issue date:	05/07/1998
From:	Andersen J NRC (Affiliation Not Assigned)
To:	Bowling M NORTHEAST NUCLEAR ENERGY CO.
References
TAC-MA1085, NUDOCS 9805080280
Download: ML20217Q674 (5)

Text

Mr. Mrrtin L. Bowling,'Jr. May 7, 1998

• . . R:cov::ry Officer - Tcchncal Szrvicts

, Northrst Nucirr Ensrgy Company

-( clo Ms. Patricia A. Loftus Director- Regulatory Affairs o P.O. Box 128 Waterford, CT 06385

SUBJECT:

MILLSTONE NUCLEAR POWER STATION, UNIT 3 - RECIRCULATION SPRAY SYSTEM (TAC NO. MA1085)

Dear Mr. Bowling:

In a March 3,1998, letter, No:1heast Nuclear Energy Company (NNECO) requested a license amendment to revise the Millstone Unit 3 licensing basis by eliminating the requirement to have the recirculation spray system directly inject into the reactor coolant system following a design t

basis accident.

In order for the staff to complete its review of NNECO's request, the staff requires additional l information. Please respond to the enclosed request for additionalinformation as soon as l possible.

Sincerely, Original signed by:

James W. Andersen, Project Manager Special Projects Office - Licensing Office of Nuclear Reactor Regulation Docket No. 50-423

Enclosure:

Request for Additional information cc w/ encl: See next page DISTRIBUTION Docket File iPUBLICg SPO-L Reading

,, SPO Reading t- . WTravers PMcKee l

LBeny JAndersen ACRS OGC.

JDurr, RI DScrenci, RI

\j

(\

DOCUMENT NAME: G:\ANDERSEN\MA1085.RAI s k T. ..iv. . . r ., ,w. 4.co .e. wae. . w th. bo m c copy without .et. chm.nti.ncio.u . r copy with .et. chm nti.ncio.u,. N = No copy OFFICE SPO-L:PM , /l SPO-L:L4 O f3 SPO-L:DD . _ l l NAME JAndersen~' lf LBerry MX> PMcKeeh!J /d[d DATE 05/ ~1/98 05/l f/98 '\ 05/1 /98' J 04/ /98 04/. /98 l I

l OFFICIAL RECORD COPY 9905000200 990507 DR ADOCK 05 y

I

., y e ce:u p 4 UNITED STATES t.

g j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20665 4001 j May 7, 1998 IAr. Martin L. Bowling, Jr.

Recovery Officer - Technical Services Northeast Nuclear Energy Company clo Ms. Patricia A. Loftus Director- Regulatory Affairs

' P.O. Box 128 Waterford, CT 06385

SUBJECT:

MILLSTONE NUCLEAR POWER STATIOh, UNIT 3 - RECIRCULATION SPRAY SYSTEM (iAC NO. MA1085)

Dear Mr. Bowling:

In a March 3,1998, letter, Northeast Nuclear Energy Company (NNECO) requested a license i amendment to revise the Millstone Unit 3 licensing basis by eliminating the requirement to have the recirculation spray system directly inject into the reactor coolant system following a design

. basis a .cident.

in orr' ar the staff to complete its review of WNECO's request, the staff requires additional i l inforn. on. Please respond to the enclosed request for additionalinformation as soon as '

possible.

Sincerely, l

l l

l s W. Andersen, Project Manager

! pecial Projects Office-Licensing 1 l / Office of Nuclear Reactor Regulation

! Docket No. 50-423 I

Enclosure:

Request for Additional l Information cc w/ encl: See next page l

1 e

^t REQUEST FOR ADDITIONAL INFORMATION MILLSTONE NUCLEAR POWER STATION. UNIT 3

~ DOCKET NO. 50-423 j

]

1. In your reanalysis, the assumed pump degradation was reduced from 10 percent to 1 5 percent. Discuss the procedures you have in place for the monitoring of pump degradation and how these procedures support this change.

2. In your submittal, the proposed change will still require direct cold leg injection in case of a long-term passive failure. In the 1986 Final Safety Analysis Report change, you completely deleted references to the recirculation spray system (RSS) direct injection path. ' Please include a discussion of this configuration for completeness or justify its -

exclusion.

3. On page 6.2-50s, you deleted the discussion on evaluation of net positive suction head

'(NPSH) for the recirculation mode of the RSS. Confirm that the recirculation spray mode is the limiting case for required NPSH.

4. 'n your submittal, you stated that the results of the design basis analyses were verified to -

Je acceptable without the direct injection in that the modified alignment delivered sufficient flow to meet the long-term cooling requirement after loss-of coolant accident, and the results of the containment anarysis show that the design basis of maintaining subatmospheric containment pressure was unchanged. Discuss in more detail the evaluations / analyses performed to support these conclusions.

I Enclosure

e  :

. Millst:ne Nucle:r Power Station

, Unit 3 l cc:

l- Lillian M. Cuoco, Esquire Joseph R. Egan, Esquire Senior Nuclear Counsel Egan & Associates, P.C.

Northeast Utilities Service Company 2300 N Street, NW P. O. Box 270 Washington, DC 20037 Hartford, CT 06141-0270 Mr. F. C. Rothen Mr. Kevin T. A. McCarthy, Director Vice President - Work Services Monitoring and Radiation Division Northeast Utilities Service Company Department of Environmental Protection P. O. Box 128 79 Elm Street Waterford, CT 06385 Hartford, CT 06106-5127 Ernest C. Hadley, Esquire Regional Administrator, Region i 1040 B Main Street U.S. Nuclear Regulatory Commission P.O. Box 549 -

475 Allendale Road West Wareham, MA 02576 King of Prussia, PA 19406 Mr. John Buckingham ,

First Seled. men Department of Public Utility Control l Town of Waterford Electric Unit Hall of Records 10 Liberty Square 200 Boston Post Road New Britain, CT 06051 Waterford, CT 06385 Mr. James S. Robinson, Manager Mr. Wayne D. Lanning NuclearInvestments and Administration Deputy Directe.,r of friepections New England Power Company Special Projects Office 25 Research Drive 475 Allendale Road Westborough, MA 01582 King of Prussia, PA 19406-1415 Mr. John Streeter Mr. M. H. Brothers Recovery Officer - Nuclear Oversight Vice President - Millstone Unit 3 Northeast Utilities Service Cornpany Northeast Nuclear Energy Company P. O. Box 128 P.O. Box 128 Waterford, CT 06385 Waterford, CT 06385 Deborah Katz, President Mr. M. R. Scully, Executive Director Citizens Awareness Network Connecticut Municipal Electric P O. Box 83 Energy Cooperative Shelburne Falls, MA 03170 30 Stott Avenue

' Norwich, CT 06360 Mr. David Amerine Vice President - Human Services Northeast Utilities Service Company P. O. Box 128 -

Waterford, CT 06385 l

l l

y 4- ' Millston3 Nuclxr Power Stati n l '. Unit 3 cc:

_ Mr. Don Schopfer  !

i. Mr. Allan Johanson, Assistant Director' Verification Team Manager L Office of Policy and Management Sargent & Lundy l- Policy Development and Planning 55 E. Monroe Street l Division Chicago,IL 60603 450 Capitol Avenue - MS# 52ERN P. O. Box 341441 Mr. G. D. Hicks Hartford, CT 06134-1441  : Director - Millstone Unit 3 Operations i

Northeast Nuclear Energy Company l, Citizens Regulatory Commission ~ P.O. Box 128 ATTN: Ms. Susan. Perry Luxton Waterford, CT 06385 180 Great Neck Road

Waterford, CT 06385 Senior Resident inspector . l t

Millstone Nuclear Power Station 1 The Honorable Terry Concannon c/o U.S. Nuclear Regulatory Commission Nuclear Energy Advisory Council P. O. Box 513 Room 4035 Niantic, CT 06357.  ;

Legislative Office Building - j

, Capitol Avenue Mr. William D. Meinert i Hartford, CT 06106 ' Nuclear Engineer l Massachusetts Municipal Wholesale l Mr. Evan W. Woollacott . Electric Company  ;)

Co-Chair P.O. Box 426 Nuclear Energy Advisory Council )

l- Ludlow, MA 01056 l' 128 Terry's Plain Road {

i Simsbury, CT 06070 Attorney Nicholas J. Scobbo, Jr.

Ferriter, Scobbo, Caruso, Rodophele, PC i l Mr. John W. Beck, President - 1 Beacon Street,11th Floor Little Harbor Consultants, Inc. Boston, MA 02108 )

Millstone -ITPOP Project Office P.O. Box 0630 i Niantic, CT 06357-0630 l Mr. B. D. Kenyon (Acting)-

l Chief Nuclear Officer- Millstone

. Northeast Nuclear Energy Company 3

h P.O. Box 128 j L -Waterford, CT 06385  ;

q Mr. Daniel L Curry j Project Director Parsons Power Group Inc.

l' ,

2675 Morgantown Road Reading, PA 19607

)

l l

l

)

i l

t- I