BECO-LTR-97-002, Application for Amend to License DPR-35,requesting Rev to Safety Limit Minimum Critical Power Ratio.Encl Attachment 1 Re Description & Evaluation of Proposed TS Change to Min Critical Power Ratio Safety Limit Withheld

Application for Amend to License DPR-35,requesting Rev to Safety Limit Minimum Critical Power Ratio.Encl Attachment 1 Re Description & Evaluation of Proposed TS Change to Min Critical Power Ratio Safety Limit Withheld

ML20134C963
Person / Time
Site:	Pilgrim
Issue date:	01/24/1997
From:	Boulette E BOSTON EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20007F895	List: BECO-LTR-97-002, Application for Amend to License DPR-35,requesting Rev to Safety Limit Minimum Critical Power Ratio.Encl Attachment 1 Re Description & Evaluation of Proposed TS Change to Min Critical Power Ratio Safety Limit Withheld ML20134C967
References
BECO-LTR-97-002, BECO-LTR-97-2, NUDOCS 9702040203
Download: ML20134C963 (3)

Text

Boston Edison 10 CFR 50.90 Pilgrim Nuclear Power Station Rocky Hill Road Plymouth, Massachusetts 02360 E. T. Boulette, PhD Senior Vice President-Nuclear January 24, 1997 BECo Ltr. #97-002 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Docket No. 50-293 License No. DPR-35 Proposed Chanae to Pilarim's Technical Specification Concernina the Safety Limit Minimum Critical Power Ratio

References:

(1) General Electric letter to NRC,10CFR Part 21, Reportable Condition, SLMCPR Evaluations, dated May 24,1996.

(2) General Electric Nuclear Energy Document NEDE-24011-P-A-11, General Electric Standard Application for Reactor Fuel (GESTAR 11), dated November,1995.

(3) NEDC-32505P, R-Factor Calculation Method for GE11, GE12 and GE13 Fuel, November 1995.

(4) Licensing Topical Report, General Electric BWR Thermal Analysis Basis (GETAB):

Data, Correlation and Design Application, NEDO-10958-A, January 1977.

(5) General Electric Fuel Bundle Designs, NEDE-31152-P, Revision 5, June 1996.

Pursuant to 10CFR50.90, Boston Edison hereby proposes to amend Operating License DPR-35 for the Pilgrim Nuclear Po'wer Station by modi'ying Technical Specification Section 2.1.2 and its Bases and Note 5 to Table 3.2.C-1.

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! ,,i This application proposes to change the Safety Limit Minimum Critical Power Ratio (SLMCPR) in Technical Specification (TS) 2.1.2 and associated Bases to reflect results of a cycle-specific calculation performed for PNPS Operating Cycle 12, expected to commence in March of 1997.

The values given in Note 5 of Table 3.2.C.1 define a " limiting rod pattem" for the purpose of establishing operability requirements for the Rod Block Monitor system. As described in Attachment 1, these values depend on the value of the SLMCPR and are changed to reflect the change in SLMCPR.

As discussed in Reference 1, the General Electric (GE) fuel type generic values of the SLMCPR may be non-conservative for certain fuel and core designc.

GE performed a cycle-specific calculation confirming the SLMCPR for PNPS that has resulted in an increase in the required SLMCPR. GE's Cycle 12 licensing analysis for Pilgrim is still undergoing review, but it is not anticipated any additional changes to Technical Specifications will be required as a result of these changes to the safety limits.

The description and evaluation of the changes are included in Attachment 1 to this letter.

Attachment 2 contains the revised Technical Specification pages. Attachment 3 shows the proposed Technical Specification revisions.

Prompt review and approval of this application by March 20,1997 is requested because the proposed amendment is needed to support Operating Cycle 12 following the refueling outage.

If you have questions, please contact P. M. Kahler at (508) 830-7939.

The information supporting this proposed change was provided by GE and is considered to be General Electric Proprietary information as described in 10CFR 2.790(a)(4) and the enclosed affidavit (Attachment 4). It is requested that this information be withheld from public disclosure.

Proprietary text is denoted by brackets in the right hand margins.

Ou1Lk E. T. Bouiette, PhD Commonwealth of Massachusetts)

County of Plymouth )

Then personally appeared before me, E. T. Boulette, who being duly sworn, did state that he is Senior Vice President - Nuclear of Boston Edison Company and that he is duly authorized to execute and file the submittal contained herein in the name and on behalf of Boston Edison Company and that the statements in said submittal are true to the best of his knowledge and belief. -

My commission expires: d M /f 77 ta '

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, i Attachments:

1. Description and Evaluation of Proposed Technical Specification Change to Minimum Critical Power Ratio Safety Limit

2. Proposed Technical Specification Pages

3. Technical Specification Marked Up Pages

4. GE Affidavit cc: Mr. Alan B. Wang, Project Manager Project Directorate 1-1 Office of Nuclear Reactor Regulation Mail Stop: 1482 U. S. Nuclear Regulatory Commission 1 White Flint North 11555 Rockville Pike Rockville, MD 20852 Regional Administrator, Region i U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Senior Resident inspector Pilgrim Nuclear Power Station Mr. Robert Hallisey, Director Radiation Control Program Massachusetts Department of Public Health 305 South Street Boston, MA 02130

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