ML16139A401
| ML16139A401 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/20/1991 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML16139A403 | List: |
| References | |
| NUDOCS 9105300138 | |
| Download: ML16139A401 (3) | |
Text
REGUA -Y-FO RD -- 1 ----
REGULASY INFORMATION DISTRIBUTIOWSYSTEM (RIDS)
ACCESSION NBR:9105300138 DOC.DATE: 91/05/20 NOTARIZED: NO DOCKET #
FACIL:50-287 Oconee Nuclear Station, Unit 3, Duke Power Co.
05000287 AUTH.NAME AUTHOR AFFILIATION TUCKMAN,M.S.
Duke Power Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Forwards BAW-2128, "Analysis of Capsule OCIII-D Duke Power Co,Oconee Nuclear Station Unit 3,Reactor Vessel Matl Surveillance Program."
DISTRIBUTION CODE: A008D COPIES RECEIVED:LTR / ENCL I SIZE: 2 -1 TITLE: OR/Licensing Submittal: Reactor Vessel Material Surveillance Report IR NOTES:
9J RECIPIENT COPIES RECIPIENT COPIES ID ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD2-3 LA 1
0 PD2-3 PD 1
1 S
WIENS,L 2
2 INTERNAL: ACRS 6
6 NRR/DEST/MTB 9H 1
1 NRR/DET/ECMB 9H 1
1 NRR/DET/ESGB 8D 1
1 0
NRR/DOEA/OTSBll 1
1 NRR/DST 8E2 1
1 NRR/DST/SRXB.8E 1
1 NRR/PMAS/ILRB12 1
1 IR OC LFMB 1
0 OGC/HDS2 1
0 01 1
1 RES/DSIR/EIB 1
1 D
RES/MEB 1
1 EXTERNAL: EG&G NAGATA,P.
1 1
NRC PDR 1
1 IL NSIC 1
1 ORNL KAM,F 1
1 0
UF TOTAL NUMBER OF COPIES REQUIRED: LTTR 26 ENCL 23
K
.ii~.____
__-_____-----------1 Duke Power Company M.S. TUCKMAN Nuclear Production Dept.
Vice President P 0. Box 1007 Nuclear Operations Charlotte, NC 28201-100 7 (704)373-3851
,I ON DUKE POWER May 20, 1991 Document Control Desk U. S. Nuclear Regulatory Commission Washington, D.C.
20555
Subject:
Oconee Nuclear Station, Unit 3 Docket No. 50-287 Gentlemen:
Pursuant to 10 CFR 50, Appendix H, please find attached a report, BAW-2128, dated May 1991 describing the results of the examination of the third capsule (OCIII-D) of the Duke Power Company's Oconee Nuclear Station Unit 3 reactor vessel surveillance program.
The objective of the program is to monitor the effects of neutron irradiation on the tensile and fracture toughness properties of the reactor vessel materials by the testing and evaluation of the tension and Charpy impact specimen. The program was designed in accordance with the requirements of Appendix H to 10 CFR 50 and ASTM Specification E185-73.
The capsule received an average fast fluence of 1.45 x 10 19n/cm2 (E > 1.0 MeV) and the predicted fast fluence for the reactor vessel T/4 location at the end of the eleventh cycle is 2.18 x 101 8n/cm 2 (E > 1 MeV).
Based on the calculated fast flux at the vessel wall, an 80% capacity factor, and the planned fuel management, the projected peak fast fluence that the Oconee Unit 3 reactor pressure lesse inside surface will receive in 40 calendar years of operation is 8.08 x 10 n/cm (E > 1 MeV).
The results of the tension tests indicated that the materials exhibited normal behavior relative to neutron fluence exposure. The Charpy impact data results exhibited the characteristic behavior of shift to higher temperature for the 30 ft-lb transition temperature and a decrease in upper-shelf energy.
These results demonstrated that the current techniques used for predicting the change in both the increase in the RT and the decrease in upper shelf properties due to NDT irradiation are conservative.
9105300138 910520 PDR ADOCK 05000287 P
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U. S. Nuclear Regulatory Commission May 20, 1991 Page 2 Please note that the results of the examination and analyses contained in this report have no impact on the current Oconee Nuclear Station Technical Specifications.
Very truly yours, M. S. Tuckman MAH/t1 Attachment xc:
w/Attachments Mr. S. D. Ebneter Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, NW, Suite 2900 Atlanta, GA 30323 Mr. L. A. Wiens, ONRR Office of Nuclear Regulation U. S. Nuclear Regulatory Commission Washington, DC 20555 Senior NRC Resident Inspector Oconee Nuclear Station