ML20198C664

Discusses Completion of Licensing Action for NRC Bulletin 96-003, Potential Plugging of ECC Suction Strainers by Debris in BWR, Issued on 980506

ML20198C664
Person / Time
Site:	Brunswick
Issue date:	12/17/1998
From:	Trimble D NRC (Affiliation Not Assigned)
To:	Keenan J CAROLINA POWER & LIGHT CO.
References
IEB-96-003, IEB-96-3, TAC-M96138, TAC-M96139, NUDOCS 9812220133
Download: ML20198C664 (5)

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\ UNITED STATES g[) j NUCLEAR REGULATORY COMMISSION [p-M,[ Sjk 2 WASHINGTON, D.C. 20066-4001 k...../ Decater 17, 1998 Mr. J. S. Keenan, Vice President j Carolina Power & Light Company Brunswick Steam Electric Plant Post Office Box 10429 Southport, North Carolina 28461 I

SUBJECT:

COMPLETION OF LICENSING ACTION FOR~NRC BULLETIN 96-03,

" POTENTIAL PLUGGING OF EMERGENCY CORE COOLING SUCTION STRAINERS BY DEBRIS IN BOILING-WATER REACTORS," DATED MAY 6, 1996 - BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 (TAC NOS.

l M96138 AND M96139)

Dear Mr. Keenan:

On May 6,1996, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin (BL) 96-03,

" Potential Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling-Water Reactors" to all holders of operating licenses or construction permits for boiling-water reactors (BWRs). The NRC issued BL 96-03 to ensure that the emergency core cooling systems (ECCS)in BWRs can perform their intended safety function to mitigate the effects of a postulated loss-of-coolant accident. The BL provided three options for resolving this issue including (1) installation of large capacity passive strainers, (2) installation of self-cleaning strainers, or (3) installation of a backflush system, in BL 96-03, the NRC staff specifically requested that licensees submit the following reports for each of their facilities:

1. A description of planned actions and mitigative strategies to be used, the schedule for implementation, and proposed technical specification, if appropriate.

2. A report confirming completion and summarizing actions taken.

In response to BL 96-03, Carolina Power & Company (CP&L) provided a letter dated November 1,1996, for the Brunswick Steam Electric Plant, Units 1 & 2 (BSEP 1 & 2). You stated that two different passive strainer options were being considered and that CP&L planned to implement one of those options. The first option was installation of larger capacity strainers on each loop of residual heat removal and core spray pump suctions in the suppression pool.

Those strainers were to be designed using the guidance in the Boiling Water Reactors Owners Group Utility Resolution Guidance (URG). The second option was installation of strainers in the i vent header downcomers above the suppression pool water line. As described in a project summary report submitted on June 5,1997, CP&L chose the first option of the suppression pool strainers.

The staff reviewed the URG and issued a safety evaluation on August 20,1998. By letter dated June 19,1998, CP&L informed the staff it had completed all actions requested by the bulletin.

These actions included: (1) completed installation of the larger-capacity suppression pool strainers on BSEP 2 by October 8,1997, and on Unit 1 by May 21,1998, and (2) continuing \

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2 Decater 17, 1998 I l 2  !

l programs for strainer inspections and cleaning, foreign material exclusion (FME), review of

! ECCS pump surveillance data, and monitoring of containment coatings. I 1

The staff has reviewed your response and has determined that the actions taken should minimize the potential for clogging of ECCS suction strainers and ensure the capability of the l ECCS to provide long-term cooling following a loss-of coolant accident as required by. l 1 10 CFR 50.46. The staff considers your actions responsive to the concerns raised in BL 96-03. j Therefore, BL 96-03 is closed for your facilities. Detailed reviews of your strainer design and i 10 CFR 50.59 evaluation may be performed on a plant-specific basis in the future.

If you have any questions regarding this matter, please contact me at (301) 415-1019.

l Sincerely, Original signed by:

J David C. Trimble, Project Manager Project Directorate 11-3 Division of Reactor Projects - 1/ll Office of Nuclear Reactor Regulation Docket Nos. 50-325 and 50-324

cc: See next page DISTRIBUTION:

nDocket FM PUBLIC PD ll-3 Reading File

.J. Zwolinski OGC R. Elliott D.Skay D.Trimble '

ACRS OPA L. Plisco, R-Il E. Brown, R-Il l E. Guthrie, R-Il B. Bonser, R-II .

FILENAME - G:\BRUNSWIC\96138ltr.wpd (6 ' e Jd OFFICE PM:PDil-3 LA:PDil-2 ' SCS PDll-3 . 1 NAME DTrimbY EDunnington b- CBerlinger FHebdonk f4 DATE 11/ 8 /98 ' 4/ F/98 ~ 4/M /98 11/d/98 COPY hNo Mo hNo Mo

" OFFICIAL RECQMD CO Y ~

. . _ . ~ ._ _. _ _ _ _ . . . _ _ . . .

Dece'ber 17, 1998 2

0 programs for strainer inspections and cleaning, foreign material exclusion (FME), review of ECCS pump surveillance data, and monitoring of containment coatings.

The staff has reviewed your response and has determined that the actions taken should minimize the potential for clogging of ECCS suction strainers and ensure the capability of the ECCS to provide long-term cooling following a less-of-coolant accident as required by 10 CFR 50.46. The staff considers your actions responsive to the concerns raised in BL 96-03.

l Therefore, BL' 96-03 is closed for your facilities. Detailed reviews of your strainer design and '

10 CFR 50.59 evaluation may be performed on a plant-specific basis in the future.

If you have any questions regarding this matter, please contact me at (301) 415-1019.

Sincerely, i

Original signed by:

David C. Trimb!e, Project Manager Project Directorate 11-3 Division of Reactor Projects - 1/11 i Office of Nuclear Reactor Regulation Docket Nos. 50-325 and 50-324 cc: See next page DISTRIBUTION:

Docket File PUBLIC PD ll-3 Reading File J. Zwolinski OGC R. Elliott D.Skay D.Trimble ACRS OPA L. Plisco, R-il E. Brown, R-Il E. Guthrie, R-ll B. Bonser, R-Il .

FILENAME - G:\BRUNSWIC\96138ltr.wpd ,#f> ,,fy/'

OFFICE PM:PDil-3 LA:PDil-2 CS h h PDil-3 .)

NAME DTrim EDunnington b CBerlinger FHebdonk I

, DATE l2-/8 /98 AllF/98 4/I /98 11 A7/98 COPY ho MNo o Mo

~ OFFICIAL RECQf(D C Y~

l 2

programs for strainer inspections and cleaning, foreign material exclusion (FME), review of ECCS pump surveillance data, and monitoring of containment coatings.

The staff has reviewed your response and has determined that the actions taken should l - minimize the potential for clogging of ECCS suction strainers and ensure the capability of the i

ECCS to provide long-term cooling following a loss-of-coolant accident as required by )

l 10 CFR 50.46. The staff considers your actions responsive to the concems raised in BL 96-03.

Therefore, BL 96-03 is closed for your facilities. Detailed reviews of your strainer design and 10 CFR 50.59 evaluation may be performed on a plant-specific basis in the future.

If you have any questions regarding this matter, please contact me at (301) 415-1019.

Sincerely, oDCu d0 Esbb David C. Trimble, Project Manager Project Directorate 11-3

, Division of Reactor Projects - 1/11 '

Office of Nuclear Reactor Regulation I

Docket Nos. 50-325 i and 50-324 cc: See next page l

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Mr. J. S. Keenan Brunswick Steam Electric Plant Carolina Power & Light Company Units 1 and 2 cc:

Mr. William D. Johnson Ms. Karen E. Long l

Vice President and Senior Counsel Assistant Attorney General Carolina Power & Light Company State of North Carolina t Post Office Box 1551 Post Office Box 629

! Raleigh, North Carolina 27602 Raleigh, North Carolina 27602 l Mr. Jerry W. Jones, Chairman Mr. Robert P. Gruber Brunswick County Board of Commissioners Executive Director l

Post Office Box 249 Public Staff- NCUC Bolivia, North Carolina 28422 Post Office Box 29520 Raleigh, North Carolina 27626-0520 l Resident inspector '

; U.S. Nuclear Regulatory Commission 8470 River Road Director Southport, North Carolina 28461 Site Operations l Brunswick Steam Electric Plant -1 Regional Administrator, Region 11 Post Office Box 10429 U.S. Nuclear Regulatory Commission Southport, North Carolina 28461 Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303 Mr. William H. Crowe, Mayor City of Southport Mr. Mel Fry, Director - 201 East Moore Street Division of Radiation Protection Southport, North Carolina 28461 N.C. Department of Environment and Natural Resources Mr. Dan E. Summers 3825 Barrett Dr. Emergency Management Coordinator Raleigh, North Carolina 27609-7721 New Hanover County Department of Emergency Management Mr. J. J. Lyash Post Office Box 1525 Plant Manager Wilmington, North Carolina 28402 Carolina Power & Light Company Brunswick Steam Electric Plant Ms. D. B. Alexander Post Office Box 10429 Manager Southport, North Carolina 28461 - Performance Evaluation and Regulatory Affairs CPB 9

' Public Service Commission . Carolina Power & Light Company l State of South Carolina Post Office Box 1551 Post Office Drawer 11649 Raleigh, North Carolina 27602-1551 Columbia, South Carolina 29211 Mr. K. R. Jury l Chief, Reactor Projects Branch 4 Manager - Regulatory Affairs j U. S. Nuclear Regulatory Commission Carolina Power & Light Company l Atlanta Federal Center Post Office Box 10429

61 Forsyth Street, SW, Suite 23T85 Southport, NC 28461-0429 j' Atlanta, Georgia 300 4

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