ML20058A120

Informs That Licensee 931105 & 10 Evaluation of 3-inch Crack Identified in Segment of Core Spray Piping Located Between Inlet Nozzle & Vessel Shroud in Facility,Acceptable

ML20058A120
Person / Time
Site:	Peach Bottom
Issue date:	11/16/1993
From:	Stephen Dembek Office of Nuclear Reactor Regulation
To:	Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
References
IEB-80-13, TAC-M88098, NUDOCS 9311300115
Download: ML20058A120 (4)

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WASHINGTON, D.C. 2055 % 001 November 16, 1993 Docket No. 50-278 Mr. George A. Hunger, Jr.

Director-Licensing, MC 52A-5 Philadelphia Electric Company Nuclear Group Headquarters Correspondence Control Desk P. O. Box No. 195 Wayne, Pennsylvania 19087-0195

SUBJECT:

CRACKING IN SEGMENT OF CORE SPRAY PIPING, PEACH BOTTOM ATOMIC POWER STATION (PBAPS), UNIT 3 (TAC NO. M88098)

This letter responds to your November 5,1993, and November 10, 1993, letters in which you forwarded an evaluation of a 3-inch crack you identified in a segment of core spray piping located between the inlet nozzle and the vessel shroud in PBAPS, Unit 3.

Your submittals were in accordance with the actions requested by IE Bulletin 80-13, " Cracking in Core Spray Spargers."

IE Bulletin 80-13 requests that licensees submit an evaluation for NRR review and approval prior to return to operation, if they identify cracking in the core spray sparger system.

The NRR staff has reviewed your submittals and determined that your evaluation is acceptable for the next cycle of operation for the following reasons (the staff verbally approved your return to operations during a November 10, 1993 conference call):

1)

Piping integrity is expected to be maintained for all conditions including loss-of-coolant accident (LOCA).

2)

In the event piping integrity is lost, your analysis determined that the sleeved piping arrangement will ensure that adequate core spray flow is maintained to ensure that the requirements of 10 CFR 50~46 remain satisfied.

3)

In the unlikely event the B core spray loop fails completely, a more realistic analysis determined that adequate core cooling is assured during a LOCA.

4) There is no safety concern with loose parts.

5) During the November 10, 1993, conference call, you committed to l

repairing the crack during the next refueling outage (the repair method will be determined later).

You also committed to revise your submittal to explicitly state that pipe whip and cold water jet impingement will not compromise the integrity of the reactor vessel LOCA.

You further committed to maintain the analysis that suppo-p g) in the event of a guillotine break of the core spray piping durino i

this statement on site for NRC's review.

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.o-Mr. George A. Hunger, Jr. November 16, 1993 Should you have any questions please contact me at.(301) 504-1422.

Sincerely,

/S/

Stephen Dembek, Project Manager Project Directorate 1-2 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation cc:

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,0 Mr. George A. Hunger, Jr. November 13, 1993 Should you have any questions please contact me at (301) 504-1422.

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l Sincerely, b

Stephen Dembek, Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

See next page

I Mr. George A. Hunger, Jr.

Peach Bottom Atomic Power Station, Philadelphia Electric Company Units 2 and 3 cc:

J. W. Durham, Sr., Esquire Mr. William P. Dornsife, Director Sr. V.P. & General Counsel Bureau of Radiation Protection Philadelphia Electric Company Pennsylvania Department of 2301 Market Street, S26-1 Environmental Resources Philadelphia, Pennsylvania 19101 P. O. Box 8469 Harrisburg, Pennsylvania 17105-8469 Philadelphia Electric Company ATTN: Mr. D. B. Miller, Vice President Board of Supervisors Peach Bottom Atomic Power Station Peach Bottom Township Route 1, Box 208 R. D. #1 Delta, Pennsylvania 17314 Delta, Pennsylvania 17314 Philadelphia Electric Company Public Service Commission of Maryland ATTN:

Regulatory Engineer, Al-2S Engineering Division Peach Bottnm Atomic Power Station ATTN:

Chief Engineer Route 1, Box 208 231 E. Baltimore Street Delta, Pennsylvania 17314 Baltimore, MD 21202-3486 Resident Inspector Mr. Richard McLean U.S. Nuclear Regulatory Commission Power Plant and Environmental Peach Bottom Atomic Power Station Review Division P.O. Box 399 Department of Natural Resources Delta, Pennsylvania 17314 B-3, Tawes State Office Building Annapolis, Maryland 21401 Regional Administrator, Region I U.S. Nuclear Regulatory Commission Mr. John Doering, Chairman

'475 Allendale Road Nuclear Review Board King of Prussia, Pennsylvania 19406 Philadelphia Electric Company 955 Chesterbrook Boulevard Mr. Roland Fletcher Mail Code 63C-5 Department of Environment Wayne, Pennsylvania 19087 201 West Preston Street Baltimore, Maryland 21201 Carl D. Schaefer External Operations - Nuclear Delmarva Power & Light Company P.O. Box 231 Wilmington, DE 19899