ML20137R781

Discusses Findings of Review Re Identified crack-like Indications or Flaws in collar-to-shroud & Pipe Sleeve Welds on Core Spray System Downcomer Piping Internal to Reactor Pressure Vessel for Pilgrim Nuclear Power Station

ML20137R781
Person / Time
Site:	Pilgrim
Issue date:	04/10/1997
From:	Milano P NRC (Affiliation Not Assigned)
To:	Boulette E BOSTON EDISON CO.
References
TAC-M93398, NUDOCS 9704140242
Download: ML20137R781 (5)

Text

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NUCLEAR REGULATORY COMMISSION WASHINGTON. D.o. 200$H001 '

April 10, 1997

• sses Mr. E. Thomas Boulette, Ph.D -

Senior Vice President - Nuclear Boston Edison Company

' Pilgrim Nuclear Power Station RFD #1 Rocky Hill Road Plymouth, MA 02360

SUBJECT:

ASSESSMENT OF CORE SPRAY SYSTEM PIPING INSPECTION AND FLAW EVALUATIONS AT PILGRIM NUCLEAR POWER STATION (TAC N0. M93398)

Dear Mr. Boulette:

During Pilgrim Nuclear Power Station's (PNPS) Refueling Outage No. 11, Boston Edison Company (BECo) identified crack-like indications (or flaws) in collar-to-shroud and pipe sleeve welds on core spray syster. downcomer piping internal ,

to the reactor pressure vessel. On February 21, 1997, BEco notified the NRC t of the core spray piping inspection findings pursuant to NRC Bulletin 80-13 i requirements. In a telephone conference call on March 3,1997, BEco updated information on the inspection findings, discussed the results of inspections and agreed to submit the inspection results and flaw evaluations for NRC review. On March 18, 1997, BEco submitted a description of flaws identified during core spray piping inspections and evaluation of flaws for NRC review prior to restart of PNPS. Further, on April 2,1997, BECo submitted additional information in response to staff's telephone request on March 20, 1997. l l

BEco's evaluation of flaw indications included in the March 18, 1997, l submittal concluded that the core spray system integrity and performance will not be compromised during the operation of PNPS for the next fuel cycle (12).

BEco provided commitments to submit its plans to the NRC for reinspection and -

repair of the core spray piping internal to the reactor vessel 3 months prior '

to the start of refueling outage No.12. BEco should work with Boiling-Water D Reactor Vessel and Internal Project Committee to develop a reinspection plan l and repair criteria to ensure piping structural integrity consisten+ with the comitments made'in your March 18, 1997 letter.

Based on the NRC staff's initial review of these submittals, the staff has concluded that the flaw indications in the core spray piping are not a restart issue for PNPS. The results of the staff's detailed evalu'ation will be provided to you at a later date. Any concerns that arise during staff review will be promptly communicated to BECo. If the staff subsequently determines that the flaw and the piping integrity evaluations are unacceptable, BEco will i be expected to take prompt action to place the facility in a safe configuration, i l

I yom NRC FEE CENTER COPY i

9704140242 970410

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E. Thomas Boulette April 10, 1997 consistent with the requirements of NRC regulations and Pilgrim technical specifications.

If you have any questions in this matter, please contact Mr. Alan Wang at

.(301) 415-1445.

Sincerely,  ;

/S/-

Patrick D. Milano, Acting Director Project Directorate I-3  ;

Division of Reactor Projects - I/II <

Office of Nuclear Reactor Regulation Docket No.'50-220 Distribution Docket File ':AWang DWessman cc: See next page. PUBLIC ~ '0GC KWichman PDI-3 RF ACRS JLyons SVarga ~ GCarpenter CBerlinger JZwolinski WKoo RConte, RI PMilano JRajan DOCUMENT NAME: G:\ PILGRIM \ FLAW.LET r,/ v4c /

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[l31- l E. Thomas Boulette- *

. consistent with the requirements of.NRC regu1'a tions 'and Pilgrim technical )

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. specifications.

If you have any questionsiin this matter, please contact Mr.- Alan Wang at k

(301) 415-1445. ,

i Sincerely, ,

4 Patrick D. Milano, Acting Director Project Directorate I-3 Division of Reactor Projects - I/II ,

Office of Nuclear Reactor Regulation

' Docket No. 50-220  :

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c .- g 3 E. Thomas Boulette Pilgrim Nuclear Powar Station i

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Mr. Lech J. Olivier Mr. Jeffery Keene J Vice President of Nuclear Licensing Division Manager <

Operations & Station Director Boston Edison Company Pilgrim Nuclear Power Station 600 Rocky Hill Road +

IFD #1 Rocky Hill Road Plymouth, MA 02360-5599 Plymouth, MA 02360 Ms. Nancy Desmond Resident Inspector Manager, Reg. Affairs Dept.

U. S. Nuclear Regulatory Commission Pilgrim Nuclear Power Station

Pilgrim Nuclear Power Station RFD #1 Rocky Hill Road Post Office Box 867 Plymouth, MA 02360 Plymouth, MA 02360 Mr. David F. Tarantino -

. Chairman, Board of Selectmen Nuclear Information Manager 11 Lincoln Street Pilgrim Nuclear Power Station

' Plymouth, MA 02360 RFD #1, Rocky Hill Road Plymouth, MA 02360 '

Chairman, Duxbury Board of Selectmeo Town Hall Ms. Kathleen M. O'Toole 878 Tremont Street Secretary of Public Safety ,

Duxbury, MA 02332 Executive Office of Public Safety One Ashburton Place Office of the Commissioner Boston, MA 02108 Massachusetts Department of Environmental Protection Mr. Peter LaPorte, Director One Winter Street Attn: James Muckerheide Boston, MA 02108 Massachusetts Emergency Management i Agency Office of the Attorney General 400 Worcester Road One Ashburton Place P.O. Box 1496 20th Floor Framingham, MA 01701-0317

. Boston, MA 02108

- Chairman, Citizens Urging Mr. Robert M. Hallisey, Director Responsible Energy Radiation Control Program P.O. Box 2621 Massachusetts Department of Duxbury, MA 02331 Public Health 305 South Street Citizens at Risk  ;

Boston, MA 02130 P.O. Box 3803 Plymouth, MA 02361 Regional Administrator, Region I U. S. Nuclear Regulatory Commission W.S. Stowe, Esquire 475 Allendale Road Boston Edison Company King of Prussia, PA 19406 800 Boylston St., 36th Floor Boston, MA 02199 Ms. Jane Fleming ,

8 Oceanwood Drive  :

Duxbury, MA 0233

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cc:~ , (cont.)- l l

Chairman.

' Nuclear-Matters Committee i Town Hall-  !

- 11 Lincoln Street.

-Plymouth, MA 02360 '

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. Mr. William D. Meinert.  :

Nuclear. Engineer Massachusetts Municipal Wholesale H Electric Company ,

P.O. Box 426  :

Ludlow, MA 01056-0426 j t

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