ML15238B457
| ML15238B457 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 09/30/1981 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8110190063 | |
| Download: ML15238B457 (4) | |
Text
-4 SEPTEMBER 3 0 19i 8
DISTRI BUTI0N NSIC KWichman 1-ecketAFei ORB#4 Rdg NEconomos, Reg. II NRC PDR DEisenhut Hrnstein L PDR JStolz E1lackwood TERA PWagner QELD Dockets Nos. 50-269, 50-270 RIngram AEOD and 50-287 JKnight 1E3 WJohnston ACRS-10 RBosnak ADromerick, IE SPawlicki Gray File Mr. William 0. Parker, Jr.
R r Vice President - Steam Production OCT
_0 Duke Power Company M.
198 1ft P. a. Box 33189 C
l 2a) 422 South Church Street Charlotte, North Carolina 28242
Dear Mr. Parker:
47-T Wy The NRR staff has been reviewing_,the broken thermal shedbolt problem at.
thle Oconee Nuclear Station', Unit 1 and we have -determined that additional information is necessary for -us to, reach a conclusion on ani acceptable course 6f action to resolve tijs,problem.
S-inc e we'feel an. expeditious resolution is necessary, we r~qest-that you meet with us ini Bethesda, Maryland during the week of IIctober 5, 1981.
We have encloseda list of topics we would like to di scuss during _our. meeti ng..which can serve as an agenda.
Because of the possible genieric. implications of this problem, some of the topics necessa,.rily invol've information related' to oier'B&
plants. Our plan is to invite representa'tives.from..each..operatin Ig B&6,W plant because of what we believe to be generic concerns and becauise of this Hsonteino te*m' n
view would welcome any recomendaton ontpics to be added the etin agenda.
If you have any questions on the, agenda.,topics and to finalize a 'meeting date, please contact your NIRC.Project Manager.
Sincerely, Prgujslgned by Thomas M. Novak, Assistant Director.
for Operating Reactors Division of Licensing
Enclosure:
Agenda/Discussion Topics cc w/enclosure:
See next page R...
C 05000269Arom SURNAME.......................
X RC FORM 318 (10-80) NRCM 0240 OFFICIAL'RECORD COPY U
U SGPO: 1981-335-960
DISTRIBUTION:
Docket File NSIC RIngram Gray File NDocket FORB#4 Rdg JKnight DEisenhut WJohnston L PDR JStolz RBosnak TERA PWagner SPawlicki Dockets Nos. 50-269, 50-270 KWichman and 50-287 NEconomos, Reg. II HOrnstein EBlackwood OELD Mr. William 0. Parker, qr.
AEOD Vice President - Steam Production IE-3 Duke Power Company ACRS-10 P. 0. Box 33189 422 South Church Street Charlotte, North Carolina 28242-.
Dear Mr. Parker:
The NRR staff has been reviewing the broken thermal shield bolt problem at the Oconee Nuclear Station, Unit 1 and we have determined that additional information is necessary for us to reach a conclusion on an acceptable course of action to resolve this roblem. Since we feel an expeditious resolution is necessary, we request that you meet with us in Bethesda, Md. during the week of October 5, 1981.
We have enclosed a 1 st of topics we would like to discuss during our meeting which can serve as an agenda.
Because of the possible generic implications 6f this problem some of the topics necessarily involve information related to other B&W plants.
If you have any questions on the agenda topics and to finalize a meeting date, please contact your NRC Prject Manager.
Sincerely, Thomas M. Novak, Assistant Director for Operating Reactors Division of Licensing
Enclosure:
Agenda/Discussion Topics cc w/enclbsure:
See next page OFFICE OR #,C O B# :
SURNAMEj PWa ne b JT k
RNAOME 31 (.00)
NRCM.0....
OFFICIALRECORD O.............-33.,,
DA E NRC FOR M 318 (10-80) NRCM 0240 OFFICIAL RECORD COP Y USGPO: 1981-335-960
Duke Power Company cc w/enclosure(s):
Mr. William L. Porter Duke Power Company P. 0. Box 33189 422 South Church Street Office of Intergovernmental Relations Charlotte, North Carolina 28242 116 West Jones Street Raleigh, North Carolina 27603 Oconee County Library M.WlimCvnuh I 501 West Southbroad Street Mr. William Cavanaugh, III Walhalla, South Carolina 29691 Senior Vice President, Energy Supply Arkansas Power & Light Company Honorable James M. Phinney P. 0. Box 551 County Supervisor of Oconee County Little Rock, Arkansas 72203 Walhalla, South Carolina 29621 Mr. J. A. Hancock Assistant Vice President, Nuclear Operations Florida Power Corporation P. 0. Box 14042, M. A. C. H. 2.
St. Petersburg, Florida 33733 Mr. Richard P. Crouse Vice President, Nuclear Toledo Edison Company Regional Radiation Representative Edison Plaza - Stop 712 ERegion IV 300 Madison Avenue EPA Region IV 345 Courtland Street, N.E.
Toledo, Ohio 43652 Atlanta, Georgia 30308 Mr. J. J. Mattimoe Francis Assistant General Manager and Mr. FacsJape Chief Engineer U.S. Nuclear Regulatory Commission Sacramento Municipal Utility District Route 2, Box 610 Sret 6201 S Street Seneca, South Carolina 29678 P. 0. Box 15830 Sacramento, California 95813 Mr. Robert B. Borsum Babcock & Wilcox Mr. Henry D. Hukill, Vice President Nuclear Power Generation Division and Director - TMI-1 Suite 420, 7735 Old Georgetown Road Metropolitan Edison Company Bethesda, Maryland 20014 P. 0. Box 480, Middletown, Pennsylvania 17057 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 J. Michael McGarry, III, Esq.
DeBevoise & Liberman 1200 17th Street, N.W.
Washington, 0. C. 20036
Enclosure AGENDA/DISCUSSION TOPICS FOR MEETING ON BROKEN THERMAL SHIELD BOLTS ON OCONEE UNIT 1
- 1. Describe the differences between the modifications made to the Oconee I thermal shield and other Oconee units including such items as bolting material and fabrication, modification procedures (shop or field), installation and preloading procedures.
- 2. Provide the details of the bolt failure investigation available'to date (metallography, etc.), describe the failure mode and describe the condition of the other bolts.
- 3. Describe the differences in hydraulic loads between the inside and outside surfaces of the thermal shield.
- 4. Describe the Loose Parts Monitoring System at Oconee 1 and explain why it was ineffective in detecting these broken bolts and its sensitivity to thermal shield vibrations (i.e., is it sensitive such to preclude damage).
- 5. Provide additional discussion regarding the missing guide block, dowel, bolt and washer investigation.
- 6. Describe any planned inspection of Oconee 2 including sample size, inspection procedures and resolution for TV inspections.