ML20129F311
| ML20129F311 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 10/03/1996 |
| From: | Wichman K NRC (Affiliation Not Assigned) |
| To: | Varga S NRC (Affiliation Not Assigned) |
| Shared Package | |
| ML20128P432 | List: |
| References | |
| TAC-M96313, NUDOCS 9610040101 | |
| Download: ML20129F311 (1) | |
Text
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UNITED STATES s
j NUCLEAR REGULATORY COMMIS810N
\\,..... /e WASHINGTON. D.C. 20086 0001 MEMORANDUM T0: Steven A. Varga, P o Director Division of Reactor Projects I/II h Keith R. Wichman, Chief FROM:
Naterial Integrity Section a
lj7{DivisionofEngineeringQ Materials and Chemical Enginee r
SUBJECT:
MILLSTONE 1: REVIEW OF CRACKED WELD OPERABILITY CAL STAFF'S RESPONSE TO THE NRC TASK INTERFACE AGR DATED AUGUST 2, 1996 CONCERNING TECHNICAL ASSISTANCE REQUEST FOR THIS REVIEW Plant Name:
N111 stone 1 Licensee:
Northeast Utilities TAC Number:
N96313 Review Status: Complete By NRC memorandum dated August 2,1996, Richard W. Cooper, Director of the Division of Reactor Projects (Region I) requested Steven A. Varga, Director of Region I Reactors (NRR), to assist in reviewing several weld operability calculations performed by the engineering staff of Northeast Utilities (NU) in reports 95-SDS-140lM1 and 9trSOS-1512M1 for Millstone 1.
The weld calculations were obtained as part of a follow up to an open item in Inspection Report (50-245/96-01 Inter-Granular Stress Corrosion) Cracking (IGSCC) program at Millstone 1 The Materials and Chemical Engineering Branch has completed the review.
Based on the evaluation, the staff concludes that all the calculation procedures and results in reports 95-SDS-1401M1 and 96-SDS-1512M1 are correct.
Although Appendix C methodology is not suitable for through-wall flaw evaluations, its use by NU in 96-SDS-1512M1 was proper for a rough estimate of the remaining margin for the circumferential flaw with the old configuration.
The staff's evaluation is attached as Attachment 1.
Since this effort does not involve the issuing of a safety evaluation report (SER), a SALP is not needed.
This completes our efforts for TAC No. M96313.
Docket No.
50-245
Attachment:
As stated
. ceg4miteesNiiiiiWN-CONTACT:
S. Sheng, NRR 415-2708
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