ML20205G979
| ML20205G979 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 10/25/1988 |
| From: | Hairston W GEORGIA POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8810280366 | |
| Download: ML20205G979 (2) | |
Text
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t w cwaws HL-119 2128C X7CJ17-H790 October 25, 1988 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Hashington, D.C.
20555 PLANT HATCH - UNIT 1 NRC DOCKET 50-321 OPERATING LICENSE DPR-57 DOCUMENTATION OF PHONE CONVERSATIONS REGARDING LIMITED SCOPE E)(PANSION OF IGSCC HELD EXAMINATIONS Gentlemen:
During Georgia Power Company's (GPC) ultrasonic inspection of ASHE Class 1 stainless steel piping and components. short axial crack-like indications were discovered in two 12-inch safe end to nozzle welds on the recirculation riser pipe in Unit 1.
These welds were classified as Category C using the criteria in Generic Letter 88-01 and NUREG 0313 Revision 2, which means that they had no identified IGSCC indications and had been treated with Induction Heating Stress Improvement (IHSI) during the 1985 maintenance / refueling outage.
After the indications were discovered, the NRC (NRR and Region II) was promptly notified.
A limited scope expansion was proposed in order to minimize radiation exposure to the available qualified ultrasonic testing inspectors.
- Also, all Category C welds had been inspected either during this outage or during the last maintenance / refueling (H/R) outage.
This letter documents the results of a series of phone conversations between members of the NRC staff and Georgia Power Company (GPC) personnel regarding a limited scope expansion of intergranular stress corrosion cracking (IGSCC) weld examinations for the current Unit 1 M/R outage.
The phone conversationa took place on October 18 and 19, 1988.
It was agreed that the scope expansion would be limited to ultrasonic testing of the following ten welds provided that no additional l
crack-like indications are detected:
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Georgia Power d U.S. Nuclear Regulatory Commission October 25, 1988-Page Two The fire remaining nozzle to safe end welds' on the 12-inch recirculation riser piping will be examined during this outage.
These~ Category C welds were examined last outage and had no recordable indications, i
Iwo jet pump instrument nozzle welds and two core spray nozzle welds will be examined this outage.
Ultrasonic testing was performed on these welds last outage also, but will be redone using a smaller size transducer.
The single nozzle to cap weld on the control rod drive line will also be examined.
Inspection on the two remaining 28-inch recirculation outlet nozzle welds (Category C) will be performed during the next M/R outage.
If you have any questions in this regard, please contact this office i
at any time.
t Sincerely, g}s). fkNY Y H. G. Hairston, III GKM/ac c: Georaia Power CoEDADY Mr. H. C. Nix, General Manager - Hatch i
Mr. L. T. Gucwa, Manager Licensing and Engineering - Hatch GO-NORMS U.S. Nuclear Reg & ton _ Commission. Washington. D.C.
Mr. L. P. Crocker, Licensing Project Manager - Hatch U.S. Nuclear Reg h tory Conmission. Reaion II 1
Mr. M. L. Ernst, Acting Regional Administrator i
Mr. J. E. Menning, Senior Resident Inspector - Hatch l
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