ML20076C257
| ML20076C257 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 08/17/1983 |
| From: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8308220290 | |
| Download: ML20076C257 (4) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 1881 -1981 PHILADELPHI A. PA.19101 (215)841-4502 JOHN S KEMPER 48CE PRESIDENT
.............m......c-August 17, 1983 Mr.
A.
Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.
S.
Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Limerick Generating Station, Units 1 6 2 Core Performance Branch Request for Additional Information Re f e rence :
PECO and NRC Conference Call dated July 8, 1983 File:
GOVT l-1 (NRC)
Dear Mr. Schwencer:
The attached additional information requested by the Core Performance Branch reviewer addresses peak cladding temperature margin deterioration due to the increased fission gas release at h igh burnup.
Sincerely, Af$f 1
l RJS/gra/97 Copy to:
See Attached Service List E0-352,353 1
i 8308220290 830817 PDR ADOCK 05000352 A
PDR l
N'l'
cc: Judge Lawrence Brenner (w/ enclosure)
Judge Richard F. Cole (w/ enclosure)
Judge Peter A. Morris (w/ enclosure)
Troy B. Conner, Jr., Esq.
(w/ enclosure)
Ann P. Hodgdon, Esq.
(w/ enclosure)
Mr. Frank R. Romano (w/ enclosure)
Mr. Robert L. Anthony (w/ enclosure)
Mr. Marvin I. Lewis (w/ enclosure)
Judith A. Dorsey, Esq.
(w/ enclosure)
Charles W. Elliott, Esq.
(w/ enclosure)
Jacqueline I. Ruttenberg (w/ enclosure)
Thomas Y. Au, Esq.
(w/ enclosure)
Mr. Thomas Gerusky (w/ enclosure)
Director, Pennsylvania Emergency Management Agency (w/ enclosure)
Mr.' Steven P. Hershey (w/ enclosure)
Angus Love, Esq.
(w/ enclosure)
Mr. Joseph H. White, III (w/ enclosure)
David Wersan, Esq.
(w/ enclosure)
Robert J. Sugarman, Esq.
(w/ enclosure)
Martha W. Bush, Esq.
(w/ enclosure)
Spence W. Perry, Esq.
(w/ enclosure)
Atomic Safety and Licensing Appeal Board (w/ enclosure)
Atomic Safety and Licensing Board Panel (w/ enclosure)
Docket and Service Section (w/ enclosure)
Y w
,r-
e DRAFT SAFETY EVALUATION REPORT CORE PERFORMANCE BRANCH Additional Information:
LOCA/ECCS PCT Margin Deterioration Due to Increased FGR at High Burnup Concern In reference I telecon concern was expressed regarding the erosion of the Limerick Peak Clad Temperature (PCT). margin by the reduction in gap heat transfer capability caused by increased Fission Gas Release (FGR) at High Burnup.
Philadelphia Electric was referred to reference letters 2 and 3, and was requested to make a statement, similar to that contained in reference 4, confirming their applicability to the Limerick design.
Response
This,ssue was addressed generically in reference 5 letter.
Positions stated in that letter, which are based upon the material contained in reference 2 and 3 letters, are applicable to the Limerick design.
Limiting plant results for a BWR /4 using P8x8R fuel assemblies are tabulated in the attached table.
The table shows that the change in PCT due to application of the NRC fission gas release correction factors to the current GE model increases as exposure increases above 20,000 mwd /STU (22,000 mwd /MT).
However, current ECCS calculations for a B WR /4 limiting plant show that there is margin to the licensing limit of 2200 F which exceeds the APCT increase due to the FGR correction factor at all exposures (See column 3 of the attached table).
Therefore, even accounting for the increased FGR there is still overall margin to the licensing limit as shown in column 4 of the table.
References I)
- Telecon, R.
O.
Meyer (NRC) and R.
J.
Stipcevich (PECO), dated July 8, 1983.
2)
- Letter, R.
E. Engel (GE) tot.
A.
Ippolito (NRC),
" Extension o f Emergency Core Cooling System Performance Limits," May 6, 1981.
3)
- Letter, R.
E.
Engel to T.
A.
- Ippolito,
" Additional Information Regarding Extension o f Emergency Core Cooling System Performance Limits," May 28, 1981.
4)
- Letter, L.
F.
Dale (MP&L) to H.
R.
Denton (NRC),
dated July 24, 1981.
5)
- Letter, R.
M.
Pifferetti (CE) to R.
L.
Tedesco (NRC), " Fission Gas Release from Fuel at High Burnup," August 21, 1981.
4' b,%
GENERAL ELECTRIC ASSESSMENT OF NRC FISSION GAS CORRECTION FACTOR
' FOR LIMITING CASE BWR/4 WITH P8x8R FUEL TYPE 4
PCT INCREASE CURRENT WITH NRC LIMITING PLANT OVERALL EXPOSURE-CORRECTION MARGIN TO 2200 F MARGIN (GWd/MT)
FACTOR ( F)
( F)
( F) 22 10 30 20 28 30 80 50 33 70 140 70 39 130 260 130 4 200 340 140 50 240 440 200 4
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