ML18009A882
| ML18009A882 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 04/30/1991 |
| From: | Vaughn G CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-011, IEB-88-11, NLS-91-103, NUDOCS 9105070255 | |
| Download: ML18009A882 (3) | |
Text
ACCELERATED +ATTRIBUTION DEMON/ATION SYSTEM E
REGULATORY INFORMATXON DISTRIBUTION SYSTEM (RIDS)
ACCESSION'BR: 9105070255 DOC. DATE: 91/04/30 NOTARIZED-YES FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit-. 1, Carolina AUTH.NAME AUTHOR AFFILIATION VAUGHN,G.E.
Carolina Power 6 Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
DOCKET 05000400
/
05000400
SUBJECT:
Submits final response to NRC Bulletin 88-011 re pressurizer surge line thermal stratification. Util contracted w/Westinghouse to perform ASME Class I stress 6
fatigue analysis of line to account for effects of striping.
DISTRIBUTION CODE:
IE30D COPIES RECEIVED:LTR J ENCL g SIZE:
TITLE: Bulletin 88-11 Pressurizer Surge Line Thermal Stratification NOTES:Application for permit renewal filed.
RECIPIENT ID CODE/NAME PD2-1 LA BECKER,D INTERNAL: AEOD/DOA AEOD/ROAB NRR HOU,S NRR/DET/EMEB 7E NRR/DOEA/OGCB11 E2 REG FILE 02 ILE 01, EXTERNAL'RC PDR COPIES LTTR ENCL 1
1 1
1 1
1 1
1 RECIPIENT ID.CODE/NAME PD2-1 PD AEOD/DSP/TPAB NRR CHAN,T NRR KUO,P NRR/DOEA/OEAB11 NRR/DREP/PEPB9D NRR/PMAS/ILRB12 RES/DSIR/EIB NSXC COPIES LTTR ENCL 1.1 1
1 1
1 NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE!.CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 20 ENCL ~iW
Carolina Power & Light Company P.O. Box 1551 ~ Rateigh, N.C. 27502 APR 30 i99>
G. E. VAUGKN Vice President Nuclear Services Department SERIAL'LS-91-103 United States Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-400/LICENSE NO. NPF-63 FINAL RESPONSE TO NRC BULLETIN 88-11, "PRESSURIZER SURGE LINE THERMAL STRATIFICATION"
References:
1)
NRC Bulletin 88-11, dated December 20, 1988 2)
CP&L Letter NLS-89-052 dated February 28, 1989 from M. A. McDuffie (CP&L) to NRC Document Control Desk 3)
NRC Letter dated May 11, 1989 from R. A. Becker (NRC) to L. W. Eury (CP&L) 4)
CP&L Letter NLS-89-160 dated December 29, 1989 from A.
B Cutter (CP&L) to NRC Document Control Desk 5)
CP&L Letter NLS-90-238 dated December 07, 1990 from A.
B Cutter,(CP&L) to NRC Document Control Desk Gentlemen:
On December 20,
- 1988, the NRC issued Bulletin 88-11 which requested addressees to establish and implement a program to confirm pressurizer surge line integrity.
Licensees were requested to demonstrate that the
'ressurizer surge line meets applicable design codes and other FSAR and
,.regulatory commitments for the licensed life of the plant, considering the phenomena of thermal stratification and thermal striping in the fatigue and stress evaluations.
In accordance with the Bulletin's reporting requirements and subsequent correspondence identified in the references
- above, Carolina Power 6 Light Company herein submits notification that the reanalysis of the Shearon Harris Nuclear Power Plant (SHNPP) surge line has been completed.
Carolina Power
& Light Company contracted Westinghouse to perform an ASME Class I stress and fatigue analysis of the SHNPP pressurizer surge line that accounts for the effects of thermal stratification and striping.
The Westinghouse analysis shows that the pressurizer surge line piping, meets applicable code requirements for the design life of the plant including maximum allowable component stress and cumulative usage factors.
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PDR 9
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Document Control Desk NLS-91-103 / Page 2
The analysis also showed that two of the surge line rigid supports may experience loads in excess of the code allowable values when the effects of thermal stratification and striping are taken into account concurrently with other design'oadings.
As a 'result CP6L is investigating modifying the design of these supports.
If,'necessary, modifications to the rigid supports will be completed in the next refueling outage (RFO Number 4)
'urrently scheduled for September 1992.
Sufficient margin remains within the bounds of the existing Justification for Continued Operation (JCO) pending implementation of the modifications (Reference 4).
The
'JCO documents the acceptability of the pressurizer surge line design in the absence of plant specific detailed reanalysis, for at least ten additional heatup and cooldown cycles-from the date of the bounding evaluation, i.e.,
June 1989.
SHNPP is currently in its fifth cycle since the 'ssuance of the JCO.
In summary, the integrity of the-SHNPP surge line has been confirmed in accordance with Bulletin requirements.
The analysis is available for inspection at Westinghouse's facilities.
Two rigid surge line supports may be modified as a result of increased loadings due to thermal stratification and striping. If necessary, these modifications will be completed during the next refueling outage'esolution of the support design will complete the actions required by the Bulletin with regard to surge line integrity.
Please refer any questions regarding -this submittal to Mr. Steven Chaplin at (919) 546-6623.
Yours very truly, GEV/SDC cc:
Mr. R. A. Becker Mr. S.
D. Fbneter Mr. J.
E. Tedrow tlpttpg
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~~(.CA Notary My commission expixes: g/g/q g G.
E. Vaughn, having been first duly sworn, did depose and say that the information contained herein is true and correct to the best of his information, knowledge and belief; and the sources of his information are
- officers, employees, contractors, and agents of Carolina Power
& Light Company.
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