ML20196G671

Forwards Safety Evaluation Authorizing Proposed Alternative Plan to Delay by Two Operating Cycles Exam of Circumferential Welds at Pbaps,Unit 2,per in 97-063,Suppl 1

ML20196G671
Person / Time
Site:	Peach Bottom
Issue date:	12/02/1998
From:	Capra R NRC (Affiliation Not Assigned)
To:	Geoffrey Edwards PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
Shared Package
ML20196G674	List: ML20196G671 ML20196G702
References
IEIN-97-063, IEIN-97-63, TAC-MA3411, NUDOCS 9812080054
Download: ML20196G671 (5)

Text

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1 December 2,1998 Mr. Garrett D. Edwards Director-Licensing, MC 62A-1 l

PECO Energy Company Nuclear Group Heaaquarters Correspondence Control Desk P.O. Box No.195 Wayne, PA 19087-0195

SUBJECT:

PEACH BOTTOM ATOMIC POWER STATION (PBAPS), UNIT 2, PROPOSED ALTERNATIVE PLAN FOR EXAMINATION OF REACTOR PRESSURE VESSEL SHELL CIRCUMFERENTIAL WELDS (TAC NO. MA3411)

Dear Mr. Edwards:

I By letter dated April 2,1998, as supplemented by letter dated August 12,1998, PECO Energy Company (the licensee) requested approval of an attemative plan for examination of longitudinal and circumferential welds of Peach Bottom Atomic Power (PBAPS), Unit 2. The request for approval of an altemate plan for reactor pressure vessel (RPV) examination of longitudinal welds was addressed in a separate action. This action addresses the licensee's request for an attemative to performing the RPV circumferential shell weld examination requirements of both the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI,1980 Edition, with the Winter 1981 Addenda (inservice inspection), and the augmented examination requirements of 10 CFR 50.55a(g)(6)(ii)(A)(2), for the PBAPS, Unit 2.

l The altemative was proposed pursuant to the provisions of 10 CFR 50.55a(a)(3)(i) and is consistent with information contained in the NRC Information Notice (IN) 97-63, Supplement 1

" Status of NRC Staff Review of BWRVIP-05," dated May 7,1998.

In IN 97-63, Supplement 1, the staff indicated that it would consider technically justified attematives to augmented inspection requirements of 10 CFR 50.55a(a)(3)(i). Technically justified attematives would be considered for inspection delays of up to two operating cycles for BWR RPV circumferential welds examination only.

The staff has reviewed the licensee's request and determined that, based on the materials in the circumferential welds, the PBAPS, Unit 2 RPV will have less embrittlement than that determined in the staffs reference case and the conditional probability of vessel failure is expected to be less than or equal to that estimated in the staffs conservative assessment of the reference case.

Additionally, the staff finds that the low inadvertent high pressure injection potential, operator training, and plant-specific procedures provide a basis to cunclude that the non-design-basis cold l

overpressure transient is unlikely to occur during the requested delay period (two operating cycles of PBAPS, Unit 2).

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G. Edwards Accordingly, the staff concludes that the proposed alternative to delay by two operating cycles the examination of circumferential welds at PBAPS, Unit 2 provides an acceptable level of quality and safety. Therefore, the proposed alternative is authorized pursuant to 10 CFR 50.55a(a)(3)(i).

The staff's safety evaluation supporting the above conclusions is enclosed.

Sincerely, original signed by:

Robert A. Capra, Director Project Directorate 1-2 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation Docket No. 50-277

Enclosure:

Gafety Evaluation l

cc w/ encl: See next page i

DISTRIBUTION Docket File THarris(E-mail SE)

PUBLIC GHill(4)

PDI-2 Reading BMcCabe JZwolinski ESullivan RCapra HConrad MThadani i

MO-Brien OGC ACRS CAnderson, RGN-l ngG FFICE PDI-2/PM c/6 PDfykh EMCB/Bb

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/// /98 82./o2./98 DATE lf / 3 /98 OFFICIAL RECORD COPY DOCUMENT NAME: PB1740. GEN

G. Edwards !

Accordingly, the staff concludes that the proposed attemative to delay by two operating cycles the examination of circumferential welds at PBA.PS, Unit 2 provides an acceptable level of quality l

and safety. Therefore, the proposed attemative i.s authorized pursuant to 10 CFR 50.55a(a)(3)(i).

The staff's safety evaluation supporting the above conclusions is enclosed.

Sincerely, i

original signed by:

i Robert A. Capra, Director 1

Project Directorate 1-2 l

Division of Reactor Projects -l/ll Office of Nuclear Reactor Regulation Docket No. 50-277 i

Enclosure:

Safety Evaluation cc w/ encl: See next page DISTRIBUTION i

l Docket File THarris(E-mail SE)

PUBLIC GHill(4)

PDI-2 Reading BMcCabe JZwolinski ESullivan RCapra HConrad MThadani MO-Brien OGC ACRS CAnderson, RGN-1 nd OFFICE PDI-2/PM c%

PDh EMCB/BC OGC M N PDI-2/D

,e ESullivanh // // thy RCapra E*C NAME MThadani:rb MO' h/h/98 ll /3/98 i

M DATE If/S/98

/// /98 82./oL/98 l

OFFICIAL RECORD COPY DOCUMENT NAME: PB1740. GEN i

l G. Edwards l Accordingly, the staff concludes that the proposed attemative to delay by two operating cycles the examination of circumferential welds at PBAPS, Unit 2 provides an acceptable level of quality and safety. Therefore, the proposed attemative is authorized pursuant to 10 CFR 50.55a(a)(3)(i).

The staff's safety evaluation supporting the above conclusions is enclosed.

Sincerely, O CL, b

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P Robert A. Capra, Director Project Directorate 1-2 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation Docket No. 50-277

Enclosure:

Safety Evaluation cc w/ encl: See next page l

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Mr. Garrett D. Edwards Peach Bottom Atomic Power Station, PECO Energy Company Units 2 and 3 l

cc:

J. W. Durham, Sr., Esquire Chief-Division of Nuclear Safety Sr. V.P. & General Counsel PA Dept. of PECO Energy Company Environmental Resources 2301 Market Street, S26-1 P.O. Box 8469 Philadelphia, PA 19101 Harrisburg, PA 17105-8469 l

PECO Energy Company ATTN: Mr. J. Doering, Vice President Board of Supervisors i

Peach Bottom Atomic Power Station Peach Bottom Township 1848 Lay Road R.D.#1 Delta, PA 17314 Delta, PA 17314 l

PECO Energy Company Public Service Commission of Maryland ATTN: Regulatory Engineer, A4-58 Engineering Division l

Peach Bottom Atomic Powar St:Sn Chief Engineer l

1848 Lay Road 6 St. Paul Centre Delta, PA 17314 Baltimore, MD 21202-6806 Resident inspector Mr. Richard McLean l

U.S. Nuclear Regulatory Commission Power Plant and Environmental l

Peach Bottom Atomic Power Station Review Division P.O. Box 399 Department of Natural Resources Delta, PA 17314 B-3, Tawes State Office Building Annapolis, MD 21401 Regional Administrator, Region i U.S. Nuclear Regulatory Commission Dr. Judith Johnsrud 475 Allendale Road National Energy Committee King of Prussia, PA 19406 Sierra Club l

433 Orlando Avenue Mr. Roland Fletcher State College, PA 16803 l

Department of Environment 201 West Preston Street Manager-Financial Control & Co-Owner Baltimore, MD 21201 Affairs g.

l Public Service Electric and Gas A. F. Kirby, til Company Extemal Operations - Nuclear P.O. Box 236 Delmarva Power & Light Company Hancocks Bridge, NJ 08038-0236 P.O. Box 231 Wilmington, DE 19899 Manager-Peach Bottom Licensing PECO Energy Company PECO Energy Company Nuclear Group Headquarters Plant Manager Correspondence Control Desk Peach Bottom Atomic Power Station P.O. Box No.195 1848 Lay Road Wayne, PA 19087-0195 Delta, PA 17314 i.

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