ML17037C519

Informs That Results of Generic Analyses Are Reported in General Electric'S NEDO-20181

ML17037C519
Person / Time
Site:	Nine Mile Point
Issue date:	12/13/1973
From:	Raymond P Niagara Mohawk Power Corp
To:	Skovholt D US Atomic Energy Commission (AEC)
References
Download: ML17037C519 (16)

Text

AEC TRIBUTION FOR PART 50 RIAL 3

(TEMPORARY FORM) CONTROL NO: 8880 FROM: DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Niagara Mohawk Power Corporation Syracuse, N. Y. 13202 Phili D. Ra ond 12-13-73 12-13-73 X TO 0 ORIG CC OTHER SENT, AEC PDR SENT LOCAL PDR Mr Skovholt 3 signed CLASS UNCLASS PROP INFO INPUT NO S REC'D DOCKET NO:

XXX 40 50-220 DESCRIPTION: ENCLOSURES:

Ltr<.,notarized, 12 13-73 ' ...re our 12-5-73 ltr Proposed Changes to Tech Specs for the which requested further analyses of the conse- Nine Mile Point Unit 0 1(Change 8 1 & Ã2) quences of Fuel- Densification at Nine Mile Poi t '

W/Attached Figs 3.1.7a, 3. 1.7b, 3. 1.7c Si Unit 1, trans the following: 3G 1+7d ~

3tIP> NOTE: R. Di s W/6 Adv, c s ( 40 cys rec'd) kÃtÃ'~JI3%3 PLANT NAME: Nine Mile Point Unit 8 1 Do'llot Ram'i~i, FOR ACTION/INFORMATION 12<<14-73 AB BUTLER(L) SCHWENCER(L) ~~> ZIEMANN(L) REGAN(E)

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NIAGARA MOHAWK POWER CORPORATION NIAGARA ' MOHAWK 300 ERIE BOULEVARD WEST SYRACUSE. N. Y. 13202 gpss(ypg December 13, 1973 d'pg

)ajar Mr. Donald J. Skovholt (l.

aWq Assistant Director for ~(.,<ey Jfeglal Operating Reactors ~+<<CII2P Directorate of Licensing United States Atomic Energy Commission 6y Washington, D. C. 20545

Dear Mr. Skovholt:

Re: Nine Mile Point Unit 1 AEC Docket'No. 50-'220 As requested in your December 5, 1973, letter, further analyses have been performed on the consequences of fuel densification at Nine Mile Point Unit 1 using the guidance provided in the enclosure to your letter, "Modified GE Model for Fuel Densification."

Results of generic analyses are reported in General Electric's NEDO-20181. The methodology reported in this document is applicable to Nine Mile Point Unit l. Accordingly, proposed changes to the Technical Specifications for this Unit, which pertain to the average planar lineal heat generation rates, are attached herewith. It is anticipated that with these changes Unit 1 will be able to achieve its full design rating of 1850 thermal megawatts for power distributions expected during normal operation.

The Site Operations Review Committee and the Safety Review and Audit Board concur with these proposed Technical Specification changes.

Very truly yours, Philip D. Ra d Vice President-Engineering GKR/vk Attachment secern Subscribed and sworn to QMEG before me this/8~day of December 1973. DEC l3 /973 E 5

Q PAIL SECPlaq.

XCIIET CLEIIIE VALERIE N. KELLY Notory Pubhc In tho Stets ol Iiew Toil Queliileri in Onon. Co. Iso. 34 430sr29 My Cornutissfon Expires Merch 30, IP~

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Nine Mile Point Unit 1 Proposed Changes to Technical Specifications Change pages 37a,'7b, 37c, etc. as follows:

~Chan a ftl Delete Figure 3.1.7 and replace with the attached Figures 3.1.7a, b, c and d. Under the Limiting Condition for Operation 3.1.7, delete the phrase in the last sentence replace with the phrase Figures 3.1.7a, b, c and d.

~chan e It2 Replace the third through sixth paragraphs of the Bases 3.1.7a with the following: "The maximum average planar LHGR curves for the various fuel types in the core shown in, Figures 3.1.7a, b, c and d are based on calculations using the models described in the GE reports NED0-10735, as modified by the GE reports NEDO-20181 and the GE letter of December 12, 1973, to V. Moore from J. Hinds,

'lant Evaluation with GEGAP-IIX.'"

Reason for Chan es 1 & 2 Changes to the maximum average planar LHGR are warranted based. on results of further analysis, and model develop-.

ment as related to the effects of fuel densification.

This additional information'is described in GE reports NED0-20181.

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NINE hfILE POINT UNIT I 16 15 14 APPROXIMATE CURRENT MINIMUM EXPOSURE

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5,000 10,000 15,000 20,000 25,000 30,000 AVERAGE PLANAR EXPOSURE (mWd/t)

FIGURE 3.1. 7.a MAXIMUM ALLOWABLE AVERAGE PLANAR LHGR APPLICABLE TO FUEL TYPE INITIAL CORE

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17 NINE MILE POINT UNIT 1 16 15 14 13 12 APPROXIMATE CURRENT MINIMUM EXPOSURE 10 0 5,000 10,000 15,000 20,000 25,000 30,000 AVERAGE PLANAR EXPOSURE (m'Wd/t)

F1GURE S. I. 7.b t1AXIMUM ALLOWABLE AVERAGE PLANAR LHGR APPLICABLE TO FUEL TYPE RELOAD 1

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p 12 APPROXIMATE CURRENT MINIMUM EXPOSURE 10 0 5,000 10,000 ,15,000 20,000 25,000 30,000 AVERAGE PLANAR EXPOSURE (mHd/t)

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>C APPROXIMATE CURRENT MINIMUM EXPOSURE 10 0 5,000 10,000 15,000 20,000 25,000 30,000 AVERAGE PLANAR EXPOSURE (mWd/t)

FIGURE'. 1. 7.d MAXIMUM ALLOWABLE AVERAGE PLANAR LMGR APPLICABLE 'TO FUEL TYPE RELOAD 3 (GENERIC C)

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e AEC D IBUTIO'7 FOR PART 50 DOCKET Pd ,-IAL (TEMPORARY FORM) CONTROL NO: 31 FILE:

FROM: DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Niagara Mohawk Power Corp.

Syracuse, N. Y., 13202 10-15-73 10-16-73 X P. D. Raymond TO ORIG CC OTHER SENT AEC PDR X A. Giambusso 3 signed 37 SENT LOCAL PDR X CLASS UNCLASS PROP INFO INPUT NO C S REC'D DOCKET NO:

ZX XX 40 50<<220 DESCRIPTIOAN: ENCLOSURES:

Ltr re their 9-14-73 ltr, requesting. Change in ATTACHMENT: results of analyses on the response Tech. Spec.......trans the following: of the refueled core to anticipated transients and postulated accidents'LANT NAME: Nine Mile Point Unit 1 ( 3 Orig & 37.. cys rec'd )

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