ML19344E037
| ML19344E037 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 08/18/1980 |
| From: | Calhoun J TENNESSEE VALLEY AUTHORITY |
| To: | |
| References | |
| NUDOCS 8008260543 | |
| Download: ML19344E037 (3) | |
Text
TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 1750 Omstant Street Tooer II
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POOR ORIGINAL Mr. James P. O'Reilly, Direster U.S. Mosleer Regalatory h =ia=
Offias of Inspestiam and anfareamsat l
Rassen u 1a1 morsetta street, seite 3100 Atlanta, Geersia 30303 Deer Mr. O'Enf11 3 7
'N m neumann VALLET AUT30EITT - SEQUUTAE IEICLEAR FLANT UNIT 1 - PO E rr
- 30. 305-327 - FACILI!T OPEEAZING LICIEEE Drn SPECIAL REPORT 86 REFISION 1 The enslemed report, whish ourr1-*= our latter dated July 15, 1960, provides 4=faw==*ia= eseem a positive moderater temperature assifiasset whiah was meneered during the law poser phyelas testing at the all oestrel reds out a== fig===*1==.
This raport is submitted la asserdenes with Segueysk unit 1 T==h= h t ' - m==*4
-- 6.9.2 and 3.1.1.3.
Very truly yours, TEMNEREME TALLEY AgTunany J. 1. Calhous Diressor of Reeleer Feuer assimeure (3) es (Easleeure):
Diressor (3)
Offias of Ma==gn===* Inf====tiam and Program Central U.S. Eseleer Regolasery w==i==
Weah1astem, BC 20555 Diressor (40)
Offias of Inspestime and ' "+-:-
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U.S. Ih=s t aar = ; " _
" "- = __ DC 20555
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oW mr. nau x.s ne.
Meeleer Safety amalvets Center Pale Alte. California 94303 b
Mr. W. T. Cottle, NEC Inspester, Sequeysk u 2:uu c c:cc:-a, t,:-
8008210 l S '1 S 3
.s SPECIAL REPORT 80 REVISION 1 l
MODERATOR TEMPERATURE COEFFICIENT
'd The all control rods out, beginning of life, moderator temperature
-5 coefficient (MIC) was determined on July 6,1980, to be 0.85 x 10 delta k/k/0F. This does not meet the criteria of less positive than 0 delta k/k/0F established in the Sequoyah Nuclear Plant Unit 1 Technical Specifications. Control rod withdrawal limits (see attached)
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have been determined. A conservatism of 1 x 10 delta k/k/ F has been included in the limits to ensure that the reactor is not operated with a positive MIC. The predicted burnup at which the MIC will be restored to within its limit is 1000 MWD /MIU.
This report is submitted in accordance with Technical Specification 6.9.2 and 3.1.1.3 Action a.
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