ML17290A865

Forwards Proprietary Evaluation of Unusual Differential Growth at Grand Gulf Unit 1, & Insp of Siemens Power Corp Fuel Assemblies at WNP-2,May 193 (EOC 8).

ML17290A865
Person / Time
Site:	Grand Gulf, Columbia
Issue date:	12/28/1993
From:	Parrish J WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17290A866	List: ML17290A865
References
GO2-93-297, NUDOCS 9401100221
Download: ML17290A865 (11)

Text

ACCELERATED 'DIS UTION DEMONST TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9401100221 DOC.DATE: 93/12/28 NOTARIZED: YES DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 50-416 Grand Gulf Nuclear Station, Unit 1, Mississippi P wer 05000416 AUTH. NAME AUTHOR AFFILIATION PARRISH,J.V. Washington Public Power Supply System RECIP.NAME RECIPXENT AFFILIATXON R Document Control Branch (Document Control Deck)MF/ge!d~

SUBJECT:

Forwards Proprietary "Evaluation of Unusual Differential Wc Growth at Grand Gulf Unit 1," 6 "Insp of Siemens Power Corp NOTES Fuel Assemblies at WNP-2,May 193 (EOC 8)."

DISTRIBUTION CODE'POID COPIES RECEIVED'LTR ENCL l SIZE' TITLE: Proprietary Review Distribution Pre Op rating License 6 Operating H~ f R

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A RECIPIENT COPIES RECIPIENT COPXES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL D PDV LA 1 1 PD4-1 LA 1 1 PDV PD 1 1 PD4-1 PD 1 1 D CLIFFORD,J 3 3 0 CONNOR Pg ~ 3 3 XNTERNAL: ACRS 6 6 AEOD/DOA 1 1 OGCJHDS1 1 0 OGC/HDS2 1 0 R-BG FI 01 1 1 EXTERNAL: NRC PDR 1 0 R

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D NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPXES REQUIRED: LTTR 21 ENCL 18 ilk

WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Bar 9Q 3000 George 1Pasbtngton Way ~ Rtcbland, 1Pasbtngton 99352-0968 ~ (509) 372-5000 G02-93-297 December 28, 1993 Docket No. 50-397 V.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Station P1-137 Washington, D.C. 20555 Gentlemen:

Subject:

WNP-2 OPERATING LICENSE NPF-21 GENERIC APPROVAL OF EXTENDED BURNUP FOR 8X8 FUEL

References:

1) G02-92-118, dated May 11, 1992, GC Sorensen (Supply System) to Nuclear Regulatory Commission (NRC), "Approval of Extended Burnup for 8X8 Fuel"

2) Letter, dated July 1, 1992, RR Assa (NRC) to GC Sorensen (Supply System), "Proposed 8X8 Fuel Burnup Extension For Cycle 8 - WNP-2" The Supply System is requesting generic NRC review and approval of the mechanical design analysis, provided in Reference 1, to extend the assembly exposure limits for the Siemens Power Corporation (SPC) 8X8 fuel from 35 GWD/MTU to 37 GWD/MTU. The Supply System in Reference 2 received staff approval for the exposure extension for Cycle 8. The Staff found the proposed burnup extension to 37 GWD/MTU acceptable but held further approval contingent on the Supply System commitment (in Reference 1) to monitor and resolve the differential rod growth issue.

The resolution to the 8X8 differential rod growth issue, prepared by SPC, is given in Attachment 1, Section 1, pages: 1-1 through 1-4. In summary, it states that the unusual fuel rod growth at Grand Gulf was caused by interference between the 120-mil channels and the lower tie plates of the fuel assembly due to thermal expansion. The resolution was for SPC to reduce the maximum envelope size of the lower tie plates for the Grand Gulf reactor.

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Page 2 GENERIC APPROVAL OF EXTENDED BURNUP FOR 8X8 FUEL The results of the WNP-2 fuel inspection which was performed in the 1993 Cycle 8 outage, also prepared by SPC, are given in Attachment 2, Section 5, page: 5-8. The results of this inspection establish that no unusual rod growth is present at WNP-2. These two documents fulfillthe Supply System commitment to monitor and resolve the 8X8 differential rod growth issue.

Please note that the attachments referenced above and enclosed contain proprietary information.

An affidavit requesting withholding from disclosure is attached.

In summary, the Supply System requests generic approval for the 8X8 extended exposure from 35 GWD/MTU to 37 GWD/MTU. The Supply System has met the commitments given in Reference 1 and will continue to complete the Cycle 10 core design, assuming that the extended burnup limits will be acceptable to the NRC. However, if it appears there may be problems with obtaining the approval, please contact the Supply System as soon as possible. Any resultant changes to the core design must be initiated prior to April 1, 1994, in order to support startup following the spring refueling outage.

. V. Parrish (1023)

Assistant Managing Director, Operations JBM:bm Attachments: 1) EMF-93-014(P), dated May 1993, "Evaluation of Unusual Differential Growth at Grand Gulf Unit 1"

2) EMF-93-137(P), dated September 22, 1993, "Inspection of Siemens Power Corporation Fuel Assemblies at WNP-2 May 1993 (EOC 8)"

CC: JW Clifford - NRC BH Faulkenberry - NRC RV NRC Site Inspector - 927N NS Reynolds - Winston & Strawn DL Williams - BPA/399

Application for Withholding AFFIDAVIT STATE OF WASHINGTON )

) ss.

COUNTY OF BENTON I, D. E. Hershberger being duly sworn, hereby say and depose:,

1. I am Senior Engineer, Product Licensing, for Siemens Power Corporation,

("SPC"), and as such I am authorized to execute this Affidavit.

2. I am familiar with the Washington Public Power Supply System letter to the NRC entitled "WNP-2 OPERATING LICENSE NPF-21 GENERIC APPROVAL OF EXTENDED BURNUP FOR 8X8 FUEL", and the SPC reports attached to this letter, EMF-93-01 4(P) entitled "Evaluation of Unusual Differential Growth at Grand Gulf Unit 1," and EMF-93-137(P) entitled "Inspection of Siemens Power Corporation Fuel Assemblies at WNP-2 May 1993 (EOC 8)," together referred to as "Document." Information contained in this Document has been classified by SPC as proprietary in accordance with policies established by SPC for the control and protection of information.

3. The Document contains information of a proprietary and confidential nature and H

is of the type customarily held in confidence by SPC and not made available to the public.

Based on my experience, I am aware that other companies regard information of the kind contained in the Document as proprietary and confidential.

4. The Document has been made available to the U.S. Nuclear Regulatory Commission in confidence, with the request that the information contained in the Document will not be disclosed or divulged.

5. The Document contains information which is vital to a competitive advantage of SPC and would be helpful to competitors of SPC when competing with SPC.

6. The information contained in the Document is considered to be proprietary by SPC because it reveals certain distinguishing aspects of SPC fuel design methodology and fuel performance which secure competitive advantage to SPC for fuel design optimization and marketability, and includes information utilized by SPC in its business which affords SPC an opportunity to obtain a competitive advantage over its competitors who do not or may not know or use the information contained in the Document.

7. The disclosure of the proprietary information contained in the Document to a competitor would permit the competitor to reduce its expenditure of money and manpower and to improve its competitive position by giving it valuable insights into SPC fuel design methodology and fuel performance and would result in substantial harm to the competitive position of SPC.

8. The Document contains proprietary information which is held in confidence by SPC and is not available in public sources.

9. In accordance with SPC's policies governing the protection and control of information, proprietary information contained in the Document has been made available, on a limited basis, to others outside SPC only as required and under suitable agreement providing for nondisclosure and limited use of the information.

10. Information in this Document provides insight into SPC fuel design methodology developed by SPC and the performance of SPC fuel. SPC has invested significant resources in developing the methodology as well as the strategy for this application and in obtaining the fuel performance data. Assuming a competitor had available the same background data and incentives as SPC, the competitor might, at a minimum, develop the information for the same expenditure of manpower and money as SPC.

THATthe statements made hereinabove are, to the best of my knowledge, information, and belief, truthful and complete.

FURTHER AFFIANT SAYETH NOT.

SUBSCRIBED before me this Q~

day of , 1993.

XMOQQXX Laurie J. Smith NOTARY PUBLIC, STATE OF WASHINGTON MY COMMISSION EXPIRES: WAQ(98 11/20/94

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STATE OF WASHINGTON )

Subject:

Impact of Harmonics Associated

) with Installati n of RR ASDs COUNTY OF BENTON )

I. J. V. PARRISH, being duly sworn, subscribe to and say that I am the Assistant Managing Director, Operations for the WASHINGTON PUBLIC POWER SUPPLY SYSTEM, the applicant herein; that I have the full authority to execute this oath; that I have reviewed the foregoing; and that to the best of my knowledge, information, and belief the statements made in it are true.

Attached to this submittal is copies of EMF-93-014, Rev. 0, and EMF-93-137, Rev. 0 which are considered by Siemens Power Corporation to contain proprietary information.

Also attached is an affidavit executed by D.E. Hershberger, Senior Engineer, Product Licensing, Siemans Power Corporation, dated December 1, 1993, which provides the basis on which it is claimed that the subject reports should be withheld from public disclosure under the provisions of 10 CFR 2.790.

The Washington Public Power Supply System treats the subject report as proprietary information on the basis of statements by its owner. In submitting this information to the NRC, the Supply System requests that the subject report be withheld from public disclosure in accordance with 10 CFR 2.790.

DATE , 1993 J.. Parrish, Assistant Managing Director perations On this date personally appeared before me J. V. PARRISH, to me known to be the individual who executed the foregoing instrument, and acknowledged that he signed the same as his free act and deed for the uses and purposes herein mentioned.

GIVEN under my hand and seal this ~~day of 1993.

Notary Public in and for the STATE OF WASHINGTON Residing at Kenne i k W hin n My Commission Expires

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