ML19329E425
| ML19329E425 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 05/12/1978 |
| From: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| Shared Package | |
| ML19329E424 | List: |
| References | |
| HOWE-73-78, NUDOCS 8006120788 | |
| Download: ML19329E425 (2) | |
Text
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Q CORSL!mCIS U P0YlBr Stephen H. Howell me,.,e-Company General Offlees: 212 West Mich8gan Avenue.. Jackson. Michsgen 49201 May 12, 1978 Howe-73-78 Mr J. G. Keppler, Regional Director Office of Inspection and Enforce =ent US Nuclear ReguJa tory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND NUCLEAR PLANT -
UNIT NO. 1, DOCKET NO. 50-329 UNIT NO. 2, DOCKET NO. 50-330 DECAY HEAT RDIOVAL PINP RADIOGRAPHY
Reference:
Letter S. H. Howell to J. G. Keppler, Midland Nuclear Plant -
Unit No.1, Docket No. 50-329, Unit No. 2, Docket No. 50-330, Decay Heat Removal Pump Radiography, Serial Howe-23-78, dated March 3, 1978.
The referenced letter was an interim report.
report in that radiography of the pump casin6s is on-going and the extent ofT any required repairs has not been fully determined.
status of each pump casing is attached.
A summary providin6 the radicBraphy and repairs closely including source inspection activities atCons B&W Canada.
An interim or final report vill be sent on or before July 1k, 1978
- ^
Attachment:
Midland, Decay Heat Removal Pump Radiography, Status of Re-radiography / Repair; dated May 8,1978 CC:
Dr Ernst Volgenau, USNRC (15)
Director, Office of Management Information and Program Control, USNRC (1) 8006 12'O )N
7 Attachment to Hove-73-78 MIDLAND DECAY HEAT REMOVAL PU4P RADIOGRAPHY' STATUSOFRE-RADIOGRAPHY /REPAIRASOFMAY5,1978 Pump Casing "A" Re-radiography completed:
CPCo and B&W Lynchburg reviewed and accepted film.
Required repairs: Weld lap open to surfact adjacent to an original veld repair. Repaired by grinding. E and PT of repair area completed and accepted. Wall thickness measurement made and accepted.
CPCo and B&W Lynchburg witnessed the above inspections.
Pump Casing "A" is now accepted.
Pump Casing "B" 3e-radiography completed:
CPCo and B&W Lynchburg reviewed and accepted film.
Required repairs: One rejectable area ( m 2 inches long). In addition, there is an indication (borderline to Code) that it was. decided to repair.
Pump Casing "C" Re-radiography completed:
CPCo and B&W Lynchburg reviewed and accepted film.
Required repairs:
deld repair was required or. an area that was excavated (approximately 2-5/8" long x 3/8" vide x 3/8" deep) to remove an unacceptable indication.
RP, PT, and hydrostatic testing have been completed.
CPCo and B&W Lynchburg witnessed the (low heat input) veld repair, the PT of the excavation and repair veld, and the casing hydrostatic test.
CPCo and B&W Lynchburg also reviewed and accepted the repair veld radiographs.
Pump Casing "C" is now accepted.
Pump Casing "D" Casing "D" was transferred to Canadian Alloy Company and then Vis-U-Ray for the re-radiography. Vis-U-Ray vill be performing the RP under B&W Canada's direction starting May 8, 1978. Casing "D" has been determined to be the casing which did not have the original repairs radiographed.
Dimensional checks were made at B&W Canada to establish a baseline against possible future distortion.
During transit (after leaving B&W Canada), some damage (gouging) occurred to a flange face. Extent, cause, and required repairs are being investigated.
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