ML20217M630

Informs of Completion of Review of P/T Limit Curves & LTOP Sys Limits Methodology & PTLR Limits Rept Submitted by Nsp. Forwards Safety Evaluation Supporting Methodology for Referencing in Administrative Controls Section of PINGP TS

ML20217M630
Person / Time
Site:	Prairie Island
Issue date:	04/29/1998
From:	Carpenter C NRC (Affiliation Not Assigned)
To:	Richard Anderson NORTHERN STATES POWER CO.
Shared Package
ML20217M635	List: ML20217M630 ML20217M690
References
TAC-MA1121, TAC-MA1122, NUDOCS 9805050073
Download: ML20217M630 (3)

Text

4U4 k UNITED STATES j

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NUCLEAR RESULATORY COMMISSION t

WASHINGTON, D.C. 30000-4001 g.-2g1

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April 29, 1998 Mr. Roger O. Anderson, Director Nuclear Energy Engineering

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Northem States Power Company

' 414 Nicollet Mall i

Minneapolis, Minnesota 55401

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNITS 1 AND 2, ACCEPTANCE FOR REFERENCING OF PRESSURE TEMPERATURE LIMITS I

REPORT (TAC NOS. MA1121 AND MA1122)

REFERENCES:

1. 'WCAP-14040-NP-A, Revision 2 Westinghouse Electric Corporation.

• Methodology Used to Develop Cold Overpressure Mitigating System Setpoints and RCS Heatup and Cooldown Limit Curves," January 15,1996.

2. NRC Generic Letter 96-03, " Relocation of the Pressure Temperature Limit Curves and Low Temperature Overpressure Protection System Limits,"

January 31,1996.

3. Letter from Joel P. Sorensen, Northem States Power Company, to NRC Document Control Desk, " Amendment of Technical Specifications to Update

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the Hestup and Cooldown Rate Curves, incorporate the Use of a Pressure Temperature Limits Report, and Change the Pressurizer F ser Operated i

Relief Valves Operability Temperature," March 6,1998. (WCAP-14780 and WCAP-14637 are Attached).

4. Letter from Joel P. Sorensen, Northem States Power Company, to NRC Document Control Desk, " Revised Prairie Island Units 1 and 2 Reactor Vessel Material Surveillance Reports," March 6,1998. (WCAP-14779, Revision 2 WCAP-14781, Revision 3, WCAP-14613, Revision 2, and WCAP-14638, Revision 2 are Attached).

5. Letter from Joel P. Sorensen, Northem States Power Company, to NRC Document Control Desk, " Response to March 16 and 19,1998 Requests for Additional Information for License Amendment Request dated March 6, 1998," March 30,1998.

6. Letter from Joel P. Sorensen, Northem States Power Company, to NRC Document Control Desk, " Response to March 13,1998 Request for AdditionalInformation for License Amendment Request dated March 6, i

1998," March 31,1998.

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7. Letter from Joel P. Sorensen, Northem States Power Company, to NRC Document Control Desk, " Supplement to the License Amendment Request dated March 6,1998," April 13,1998.

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/0 The NRC staff has completed its review of the pressure temperature (P/T) limit curves and low temperature overpressure protection (LTOP) system limits methodology and the pressure temperature limits report (PTLR) submitt9d by the Northem States Power Company (NSP). We sb'~

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Contact:

Maggalean W. Weston, (301) 415-3151 i

9805050073 990429 I

PDR ADOCK 05000282 l

P PDR i

R. O. And;rson 2

April 29, 1998 find the methodology to be acceptable for referencing in the administrative controls section of the Prairie Island Nuclear Generating Plant, Units 1 and 2, Technical Specifications to the extent specified and under the limitations delineated in your submittals and the associated NRC Safety Evaluation, which is enclosed. The Safety Evaluation defines the basis for acceptance of the submittals. Our acceptance applies only to the matters described in the submittals.

The NRC notes that NSP should address the methoo for assessing the credibility of the reactor pressure vessel surveillance capsule data consistent with the criteria provided in the revised rule (10 CFR 50.61) or in Regulatory Guide 1.99, Revision 2, in future revisions to the PTLR.

The methodology for review relating to the P/T limit curves and the LTOP system limits was provided in the references listed above. WCAP-14040-NP-A provided, in part, the methodology used for determining the acceptance of the Prairie Island methodology.

I The methodology in WCAP-14040-NP-A, along with supplements provided by NSP, will be used to calculate future changes to the P/T limit curves. NSP may generate new P/T limit curves in accordance with this methodology without prior approval of the staff. However, changes to the methodology must first be reviewed and approved by the staff. System limits may be subject to audit by the staff through inspections as necessary.

We do not intend to repeat our review of the matters described in the submittals if the submittals appear as references in other license applications relating to your plants, except to ensure that the material in the submittals is still applicable to your plants as indicated in the conclusion mtion of the Safety Evaluation.

l Should our criteria or regulations change so that our conclusions as to the acceptability of the j

methodology is invalidated, licensees refe.'encing these documents will be expected to revise and resubmit their respective documentation, or submit justification for the continued effective i

applicability of the documents without revision of their respective documentation.

j i

Sincerely I

ORIGINAL SIGNED BY Cynthia A. Carpenter, Director l

Project Directorate 111-1 j

Division of Reactor Projects - lil/IV l

Office of Nuclear Reactor Regulation f

pistribution:

Docket Nos. 50-282 and 5-306 Docket File BSheron CYLiang RZimmerman PUBLIC GHolahan JStrosnider JMcCormick-Barger

Enclosure:

Safety Evaluation PDill-1 R/F EWeiss KWichman GHill(4)

OGC RCaruso BElliott TSB R/F cc w/ encl: See next page ACRS LLois MKhanna THarris (TLH3) 1 DOCUMENT NAME: G:\\MWW\\PIPTLR.LTR l

To receive a copy of this document, indicate in the box: "C" = Copy w/o attachment / enclosure *E" = Co_pyw/ attachment / enclosure "N" = No copy OFFICE

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Mr. Roger O. Anderson, Director Prairie Island Nuclear Generating Northem States Power Company Plant ec:

J. E. Silberg, Esquire Site Licensing Shaw, Pittman, Potts and Trowbridge Prairie Island Nuclear Generating 2300 N Street, N. W.

Plant Washington DC 20037 Northem States Power Company 1717 Wakonade Drive East Plant Manager Welch, Minnesota 55089 Prairie Island Nuclear Generating Plant Tribal Council Northem States Power Company Prairie Island Indian Community 1717 Wakonade Drive East ATTN: Environmental Department Welch, Minnesota 55089 5636 Sturgeon Lake Road Welch, Minnesota 55089 Adonis A. Nebiett Assistant Attomey General Office of the Attomey General 455 Minnesota Street Suite 900 St. Paul, Minnesota 55101-2127 U.S. Nuclear Regulatory Commission Resident inspector's Office 1719 Wakonade Drive East Welch, Minnesota 55089-9642 Regional Administrator, Region 111 U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Mr.Jeff Cole, Auditor / Treasurer Goodhue County Courthouse Box 408 Red Wing, Minnesota 55066-0408 Kris Sanda, Commissioner Department of Public Service 121 Seventh Place East Suite 200 St. Paul, Minnesota 55101-2145 November 1996 i