ML19351E590

Advises That ECCS Analysis Can Not Be Firmly Established Since GE Has Not Been Required Under NRC Direction to Develop Model Changes Suggested by NUREG-0630

ML19351E590
Person / Time
Site:	Limerick
Issue date:	12/04/1980
From:	Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Tedesco R Office of Nuclear Reactor Regulation
References
RTR-NUREG-0630, RTR-NUREG-630 NUDOCS 8012100493
Download: ML19351E590 (2)

Text

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PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILA DELPHI A PA.19101 JOHN S. KEMPER

. .J/C"In!L.. 0EC 0 41980 Mr. Ibbert L. '1bdesco Assistant Director for Licensing Division of Licersing U.S. Nuclear Fegulatory Comission Washington, DC 20555

Subject:

Limerick Generating Station, Units 1 & 2 h7C Position on Clad Sw11ing and Rupture Models for IOCA Analyses Peferences: 1. NRC letter of October 9,1980 frun Ibbert L. Tedesco to Edward G. Bauer, Jr. " Staff Position on Cladding, Swlling and Rupture >bdels for IOCA Analyses."

2. GE letter MEW-268-79 of Novsber 2,1979 frcrn R. H.

Budholz to Darrell G. Eisenhut, "CENL Cladding, Swell and Rupture Data - BWR Evaluation."

3. GE letter MFN-278-79 of Novmber 16, 1979 frcrn R. H.

Bucbholz to Darrell G. Eiserhut, "GE c'1nMing Hoop Stress at Perforation."

4. GE letter MFN-066-80 of March 24, 1980 frcra G. G. Sherwotd to Richard P. Denise.

5. GE letter MEN-294-79 of Deceber 7,1979 frczn R. H.

Buchhol to Richard P. Denise, cczments on the draft report " Cladding, Swelling and Rupture McN1a for IOCA Analyses," hvREG-0630 dated Noverter 8,1979."

6. ACRS letter of Septerter 9,1980 frun Milton S. Plesset to William J. Circks, "CinMing, Swelling and Rupture Models for ICCA Analysis - SUREG-0630."

Dear Mr. Tedesco:

Your October 9,1980 (Peference 1) lette;' requested supplemental calculations to the Lirerick ECCS analyses in accordance with the materials models of hvFEG-0630.

It is our position, supported by General Electric, that the Appendix K analyses, that will soon be tendered in FSAR Section 6.3.3, conservatively bound the clad swelling and rupture ncdel concerns of NUREG-0630 and that additional analyses would be of little value in the ECCS Perforrance Evaluatirn Feview. In any case, since General Electric has not been .@ed, under NPC diruction, to develop the model changes suggested by NUREG-0630, the schedule for periernung such an analysis for Limerick cannot be finnly established.

30d

.s lk son w, m n - - -

DEC 0 41980 Mr. Robert L. Tat aam i

Assistant Director for Licensing Divisicn of Licensing U.S. Nuclear Regulatory Ccurdssica

. Please note the follcwing references in support of this position. E letters defending existing Wal suitability (References 2, 3, and 4) . E letter providing cnmvmts on NUREC-0639 (Reference 5) and finally a Septs &ar 9,1980 letter frcan the ACRS to the NRC (Reference 6) witich states in the final paragraph "'Ihe ACBS raentmands that irplanentation of the NUREG-0630 models and oter significant changes in the evaluation nodels be held in cbeyance until a tnorough revision of the @ Mix K requirenents can be LWh by the NBC staff."

Very truly yours,

.~, 5. dw

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