ML17037C254

Letter Regarding the Analysis of the Capability of Unit 1 to Accommodate Anticipated Transients Without Scram and Advising That Reanalyses Have Been Initiated and Will Be Submitted by October 1, 1974

ML17037C254
Person / Time
Site:	Nine Mile Point
Issue date:	11/30/1973
From:	Schneider R Niagara Mohawk Power Corp
To:	Anthony Giambusso US Atomic Energy Commission (AEC)
References
Download: ML17037C254 (6)

Text

j

~l AEC TRIBUTION FOR PART 50 DOCKET RIAL

, (TEMPORARY FORM)

CONTROL NO:

'ILE:

8642 CLASS UNCLASS XXX PROP INFO FROM:

Niagara Mohawk Power Corporation

Syracuse, N>Y. 13202 Mr. R.R. Schneider TO ~

A. Giambusso DATE OF DOC 11-30-73 ORIG 1 signed INPUT DATE REC'D 12&-73 CC OTHER NO C S PZC'D MEMO RPT OTHER SENT AEC PDR XXX SENT LOCAL PDR DOCKET NO:

50-220 DESCRIPTION:

Ltr re our 10-19-73 ltr....concerning reanalyses of the anticipated transients with scram, adv that this study has been initiated and will be submitted by 10-1-74F, as requested in our ltr.

ENCLOSURES:

'ACKNOWLEDGED

.DO NOT REMOVE PLANT NAME:

Nine Mile Point FOR ACTION/INFORfATION BUTLER(L)

W/

Copies CLARK(L)

W/

Copies GOLLER(L)

W/

Copies KNIEL(L)

-W/

Copies SCHWENCER(L)

W/

Copies STOLZ(L)

W/

Copies VASSALLO(L)

W/

Copies SCHEMEL(L)

W/

Copies V ZIEMANN(L)

W/4 Copies DICKER(E)

W/

Copies KNIGHTON(E) "

W/

Copies YOUNGBLOOD(E).

W/

Copies REGAN(E)

W/

Copies W/

Copies W/

Copies W/

Copies INTERNAL DISTRIBUTION REG AEC PDR

OGC, ROOM P-506A MUNTZING/STAFF CASE u'GIAMBUSSO BOYD MOORE (L) (BWR)

DEYOUNG (L) (PWR)

YSKOVHOLT (L)

P.

COLLINS QREG OPR FILE & REGION(3)

MORRIS STEELE TECH REVIEW

~HENDRIE SCHROEDER MACCARY KNIGHT PAWLICKI SHAO STELLO HOUSTON NOVAK ROSS IPPOLITO TEDESCO LONG LAINAS BENAROYA VOLIZER DENTON GRIMES GAMMILL KASTNER BALLARD SPANGLER ENVLRO MULLER DICKER KNIGHTON YOUNGBLOOD REGAN PROJECT LDR HARLESS LIC ASST HIGGS (L)

GEARIN (L)

GOULBOURNE (L)

LEE (L)

MAIGRET (L)

SERVICE (L)

SHEPPARD (E)

SMITH (L)

TEETS (L)

WADE (E)

WILLIAMS (E)

WILSON (L)

A/T IND

'RAIIMAN SALTZMAN B.

HURT PLANS

~MCDONALD DUSE INFO C, MILES 1 -. LOCAL PDR 1 - DTIE(ABERNATHY) 1 - NSIC(BUCHANAN) 1 - ASLB(YORE/SAYRE/

WOODARD/"H" ST, 16 -

CYS ACRS HOLDING EXTERNAL DISTRIBUTION (1) (2)(10)-NATIONAL LAB' 1-ASLBP(E/W Bldg,Rm 529) 1-W.

PENNINGTON, Rm E-201 GT 1"CONSULTANT'S NEMMARK/BLUME/AGBABIAN

.1-GERALDg4LRIKSON...ORNL 1-PDR-SAN/LA/NY 1-GERALD LELLOUCHE BROOKHAVEN NAT, LAB 1"AGMED(Ruth Gussman)

RM-8-127, GT.

1-.RD MULLER..F-309 GT

~

~

1 tt

~

~

~

~

~

~ 0

~

p ~

t II t

t t

t I t

~ t

'tg

~ ~ ~

'gomufatofff Fifo Oy.

NIAGARA MOHAWKPOWER CORPORATION NIAGARA lQ)

MOHAWK 300 ERIE BOULEVARD WEST SYRACUSE. N. Y. 13202 I

9 DFC,'4 3973I 1973 IL, Ny gg, 1ÃQ'~'~

November 30 Mr. A. Giambusso Deputy Director for Reactor Projects Directorate of Licensing U. S. Atomic Energy Commission Washington, D. C.

20545

Dear Mr. Giambusso:

Re:

Nine Mile Point Unit 1 Docket No. 50-220 10 lg '..

app~

III C 5 tg73 IrppL1Ippy SNL pfp7(pl kocEQ gag Our application for conversion of Provisional Operating License No. DPR-17 to a full-term operating license included an analysis of the capability of Nine Mile Point Unit 1 to accommodate anticipated transients without scram.

Since the time of that submittal, certain changes have taken place which affect the analysis of these transients and other anticipated transients.

The attachment to your letter of October 19, 1973 included assumptions and criteria to be used in the analysis of transients without scram.

The analysis which was included in our previous submittal showed that for the worst case during anticipated transients without scram, containment pressure could reach 45 psig.

This exceeds the design pressure of the suppression chamber.

The attachment to your letter of October 19, 1973 specified containment design pressure as the acceptable limit.

L The previous analyses'of other transients which include scram were performed assuming no tripping of the recirculation pumps.

Preliminary investi-gations indicate that incorporation of a tripping of the pumps on high reactor pressure aggravates these transients.

...See Page 2

8642

TQ Mr. A. Giambusso Because of the changes to the analyses as described

above, Niagara Mohawk considers that the addition of the recirculation pump trip is not justified until reanalyses of anticipated transients without scram and other transients are completed.

Therefore, the tn.p of tFie recirculation pumps on high reactor pressure is being deleted from the protection system circuitry.

The reanalyses of the anticipated transients without scram have been initiated and will be submitted by October 1, 1974 as requested in the attachment to your letter.

Very truly yours, udolph

. Schn ader Vice President

.- Electric Operations CVM/sz

4f.

I 4'

L>