ML19329E425

Interim Deficiency Rept Re Decay Heat Removal Pump Radiography.Pump Casing Status Rept Encl.Final Rept Will Be Forwarded on 780714

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: ML19329E425 ML19329E426 ML19329E430
References
HOWE-73-78, NUDOCS 8006120788
Download: ML19329E425 (2)

Text

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CORSL!mCIS Stephen H. Howell me,.,e- ,

U P0YlBr 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 March 3,Heat Removal Pump Radiography, Serial Howe-23-78, dated 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 B&W Canada. and repairs closely including source inspection activities atCons An interim or final report vill be sent on or before July 1k, 1978 .

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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

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, 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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