ML20154C960

Forwards Safety Evaluation Re Util 880428 & 0505 Submittals of Results of Inservice Insp Exam.Flaw Indications Conditionally Acceptable for Svc.Augmented Inservice Insp Required During Next Three Insp Periods,Per ASME Code

ML20154C960
Person / Time
Site:	Farley
Issue date:	05/12/1988
From:	Reeves E Office of Nuclear Reactor Regulation
To:	Mcdonald R ALABAMA POWER CO.
Shared Package
ML20154C962	List: ML20154C960 ML20154C965
References
TAC-67960, NUDOCS 8805190002
Download: ML20154C960 (3)

Text

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MAY 121988 DISTRIBUTION Docket File U W

1. . , gg ge porQ Docket No. 50-348 PD21 r/f~ ACRS (10)

S. Varga (14E4)

G. Lainas E. Adensam Mr. R. P. Mcdonald P. Anderson Senior Vice President E. Reeves (2J Alabama Power Company OGC Post Office Box 2641 E. Jordan (MNBB 3302)

Birmingham, Alabama 35291-0400 J. Partlow (9A2)

B. Elliot (9H15)

Dear Mr. Mcdonald:

M. Hum (9H15)

SUBJECT:

APPROVAL OF FRACTURE MECHAklCS ANALYSIS OF TWO REACTOR VESSEL FLAW INDICATIONS IN LOOP B, HOT LEG N0ZZLE TO SHELL WELD -

JOSEPH M. FARLEY NUCLEAR PLANT, UNIT 1 (TAC N0. 67960)

By letters dated April 28 and May 5,1988, you provided results of a recent inservice Inspection (ISI) examination for Unit 1. During the eighth refueling outage, ISI examinations of certain reactor vessel welds and ligaments were performed in accordance with the ASME Cnde,Section XI. The entire examination was completed on April 24, 1988.

During the scheduled 151 of the reactor vessel, four flaw indications were detected that exceed the acceptance standards of ASME Code,Section XI. To provide enhanced characterization and sizing of these indications, the Ultrasonic Data Recording and Processing System (UDRPS) was used. The UDRPS data revealed two indications in the lower shell longitudinal seam weld within the cladding. Also, two flaw indications located in the loop B hot leg nozzle-to-shell weld exceed the standards of ASME Code,Section XI. Therefore, the component would be unacceptable for service unless such flaws are removed or repaired. However, as allowed by ASME Code, a f racture mechanics evaluation, needed to demonstrate acceptance for service by evaluation and reexamination, was provided for our approval. We have completed our review.

Our enclosed safety evaluation concludes the following:

1. The fracture mechanics analysis demonstrates that the two flaw indications in the outlet nozzle-to-shell weld will not grow during the life of the plant to a. size that will affect the integrity of the reactor vessel.

2. These flaw indications are conditionally acceptable for service.

Therefore, augmented inservice inspection is required during the next three inspection periods pursuant to ASME Code,Section XI,  !

paragraph IWB-2420(b).

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$gjM888$$$ e 1

Mr. R. P. Mcdonald .

~

3. You responded to Generic Letter 83-15 Dy letter dated October 26, 1983 comitting to the implementation of Regulatory Guide 1.150. l Thus, in the event that future examinations of he reactor vessel ,

detect flaw indications that extend from the inside diameter past the clad to the base metal interface, you must address the effects of the cladding in all required fracture mechanics evaluations.  !

4. The 1st and 2nd interval examinations on the reactor vessel were the same refueling outage. Paragraphs '

performed during(4)(1) and (ii) do not permit inservice inspections 10CFR50.55a(g)  !

that are performed during two intervals to coincide because the regulation addresses the requirement for successive intervals.

Region II will review this item during the review of the 90-day ISI report.

Please contact us should you have any questions.

Sincerely,  !

Edward A. Reeves, Sr. Project Manager i Project Directorate 11-1 l Division of Reactor Projects 1/11 '

Enclosure:

Safety Evaluation i cc w/ enclosure:  !

I See next page l l

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0FC :LA:PD21:DRPR:PM:PDJ R: PD21: R:  :  :  :

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NAME :PAnderson:ch: ER  : d nsam  :  :  :  : l DATE : 5/ /88  : 5/lkf88  : 5/,)]/38  :  :  :  :

0FFICIAL RECORD COPY

i Mr. R. P. Mcdonald Alabama Power Company Joseph M. Farley Nuclear Plant ,

l cc:

Mr. Bill M. Guthrie D. Biard MacGuineas, Esquire Executive Vice President Volpe, Boskey and Lyons  ;

Alabama Power Company 918 16th Street, N.W.  !

Post Office Box 2641 Washington, DC 20006 Birmingham, Alabama 35291-0400 Charles R. Lowman Mr. Louis B. Long, General Manager Alabama Electric Corporation Southern Company Services, Inc. Post Office Box 550 1 Post Office Box 2625 Andalusia, Alabama 36420 Birmingham, Alabama 35202 Chairman Pegional Administrator, Region II Houston County Commission U.S. Nuclear Regulatory Commission  :

Dothan, Alabama 36301 101 Marietta Street, Suite 3100 Atlanta, Georgia 30323 Ernest L. Bleke, Jr., Esquire ,

Shaw, Pittman, Potts and Trowbridge Claude Earl Fox, M.D.  !

2300 N Street, N.W. State Health Officer +

Washington, DC 20037 State Department of Public Health i l

State Office Building Montgormry, Alabama 36130 Robert A. Buettner, Esquire Balch, Bingham, Baker, Hawthorne, Mr. J. D. Woodard l Wiliiams and Ward General Manager - Nuclear Plant I i Post Office Box 306 Post Office Box 470 Birmingham, Alabama 35201 Ashford, Alabama 36312  :

Resident Inspector i

U.S. Nuclear Regulatory Commission Post Office Box 24 - Route 2 Columbia, Alabama 36319 i

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