ML19339A883
| ML19339A883 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 08/27/1976 |
| From: | Johnson W YANKEE ATOMIC ELECTRIC CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| WYR-76-88, NUDOCS 8011050638 | |
| Download: ML19339A883 (2) | |
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YANKEE ATOMICiELECTRIC COMPANY
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August 27, 1976
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/8 United States NucleariRe atory Commission
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O Attention: Office of Nuclear Reacter Regulation
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Subject:
Upper Hemispherical Head Temperature
Reference:
(1)
License No. DPR-3 (Docket No. 50-29)
(2)
Technical Specification, " Yankee Nuclear Power Station Core XII Performance Analysis" Appendix B, Additional LOCA Analysis, (February 20, 1976).
(3)
Letter from W. P. Johnson to USNRC, WYR 76-84, (August 23, 1976).
(4)
Letter from W. P. Johnson to USNRC, WYR 76-86, (August 26, 1976)
Dear Sir:
The re-analysis of the most limiting LOCA break size identified in Reference (2) assuming T (560 F) for the coolant temperature in the upperheadhasbeencompIOked. The results of this re-analysis are thus being transmitted to you in accordance with the schedule put forth in Reference (3).
The peak clad temperature (PCT) for Exxon fuel at 10.15 kw/ft and 180 Effective-Full-Power-Days (EFFD) burnup was calculated to be 1987.5 F.
This number compares conservatively to the previmusly calculated PCT value of 2019. F for the Exxon fuel at this bt.rnup and 10.5 kw/ft.
In s:rmary, the above results confirm the earlier info _mation transmitted to you in Reference (4) and justifies the.85 kw/ft reduction in the limiting LHGR for Exxon fuel for Yankee Rowe Core XII.
Any further questions regarding this matter please contact our Mr. William J. Szymczak at our Engineering Office, 20 Turnpike Road, Westborough, Massachusetts, 01581, (617) 366-9011, Extension 2844.
Very truly yours, bb'dO YAIEEE ATOMIC ELECTRIC COMPANY l
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W. P Johnson Vice'iresident WJS/kg
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.NRC DISTRIBUTION rOn PART 50 DOCKET MATERIAL TO:
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DATE OF DOCUMENT Yankee Atomic Electric Co.
8/27/76 N. R. C.
Westboro, Mass.
oATE RECElvEo W. P. Johnson 9/2/76 NLETTER ONOTORIZED PROP INPUT FORM NUMDER OF COPtES RECEIVED MoRIGIN AL gUNCLASSIFIEo One signed OCoPY DESCRIPTION E N CLOSU RE Ltr. tc their 2/20/76, 8/23/76 and 8/26/76 ltrs......concerning Upper Hemispherical Head Temperature.
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PLANT NAME:
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PROJECT MANAGER:
Burger PROLECT PANAGER:
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Sheppard
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SYSTEMS SAFETY l PIANT SYSTEMS SITE SAFITY &
'_JNRC PDR HEINEMAN Xt TEnEsco ENVIRO ANALYSIS 6
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SCHROEDER l BENAROYA DENTON & MUT T FR OELD
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L MIPC MACCARRY KIRKWOOD ERNST i ' CASE KNIGitT BALLARD IIIANAUER SIIMEIL OPERATING REACTORS SPANcLER
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EXTERNAL DISTRIBUTION
[ LPDR: Greenfield Mass.
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LA PDR CONSULTANTS iASL3:,
MOLOIN/5ENT *. $9/Afo -
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