ML20151J620
| ML20151J620 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 08/01/1997 |
| From: | Padovan L NRC (Affiliation Not Assigned) |
| To: | Hunger G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| IEB-96-003, IEB-96-3, TAC-M96160, TAC-M96161, NUDOCS 9708050203 | |
| Download: ML20151J620 (4) | |
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August 1, 1997 I
Mr.: George A. Hunger, Jr.
Director-Licensing,-MC 62A-1 l
PECO Energy Company-
~ Nuclear Group Headquarters 1
Correspondence Control Desk
-P.O. Box No. 195 Wayne, PA 19087-0195
' SUJJECT:
REQUEST FOR ADDITIONAL INFORMATION'(RAI) RELATED TO NRC BULLETIN' 96-03, " POTENTIAL PLUGGING OF EMERGENCY CORE COOLING SUCTION.
' STRAINERS BY DEBRIS IN BOILING-WATER REACTORS," PEACH BOTTOM ATOMIC 1
POWER STATION, UNITS 2 AND 3 (TAC NOS. M96160 AND M96161) i
Dear Mr. Hunger:
PECO Energy Company (PECO). submitted November 1, 1996, and,May 5, 1997, j
letters to the:NRC to resolve requested NRC Bulletin 96-03 actions. We i
. reviewed your. letters and determined.that we need additional information to complete our evaluation. Our RAI is enclosed.
Please contact me at (301):415-1423 if you have any questions.
)
Sincerely,
/S/
L. Mark Padovan; Project Manager 1
Project. Directorate I-2 1
1 Division of Reactor Projects - I/II.
Docket Nos. 50-277/278
Enclosure:
RAI l
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August 1, 1997 Mr. George A. Hunger, Jr.
Director-Licensing, MC 62A-1 PECO Energy Company Nuclear Group Headquarters Correspondence Control Desk i
P.O. Box No. 195 Wayne, PA 19087-0195
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION (RAI) RELATED TO NRC BULLETIN 96-03, " POTENTIAL PLUGGING OF EMERGENCY CORE COOLING SUCTION STRAINERS BY DEBRIS IN BOILING-WATER REACTORS," PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 (TAC NOS. M96160 AND M96161)
Dear Mr. Hunger:
PECO Energy Company (PECO) submitted November 1, 1996, and May 5, 1997, letters to the NRC to resolve requested NRC Bulletin 96-03 actions.
We reviewed your letters and determined that we need additional information to complete our evaluation. Our RAI is enclosed.
Please centact me at (301) 415-1423 if you have any questions.
Sincerely, 1
L, Mark Padovan, Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket Nos. 50-277/278
Enclosure:
RAI cc w/ encl: See next page
~
Mr. George A. Hunger, Jr.
Peach Bottom Atomic Power Station, PECO Energy Company Units 2 and 3 i
i cc:
I J. W. Durham, Sr., Esquire Chief-Division of Nuclear Safety i
Sr. V.P. & General Counsel PA Dept. of PECO Energy Company Environmental Resources 2301 Market Street, S26-1 P.O. Box 8469 l
Philadelphia, PA 19101 Harrisburg, PA 17105-8469 PECO Energy Company ATTN: Mr. T. N. Mitchell, Vice President Board of Supervisors Peach Bottom Atomic Power Station Peach Bottom Township 1848 Lay Road R. D. #1 Delta, PA 17314 Delta, PA 17314 PECO Energy Company Public Service Commission of Marylar.d ATTN: Regulatory Engineer, A4-SS Engineering Division Pench Bottom Atomic Power Station Chief Engineer 1848. Lay Road 6 St. Paul Centre Delta, PA 17314 Baltimore, MD 21202-6806 Resident Inspector Mr. Richard McLean U.S. Nuclear Regulatory Commission Power Plant and Environmental Peach Bottom Atomic Power Station Review Division i
P.O. Box 399 Department of Natural' Resources Delta, PA 17314 B-3, Tawes State Office Building Regional Administrator, Region I U.S. Nuclear Regulatory Commission Dr. Judith Johnsrud i
475 Allendale Road National Energy Committee King of Prussia, PA 19406 Sierra Club 433 Orlando Avenue Mr. Roland Fletcher State College, PA 16803 Department of Environment 201 West Preston Street Manager-Business & Co-owner Affairs Baltimore, MD 21201 Public Service Electric and Gas Company A. F. Kirby, III P.O. Box 236 External Operations - Nuclear Hancocks Bridge, NJ 08038-0236 Delmarva Power & Light Company l
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 l.
Peach Bottom Atomic Power Station P.O.. Box No. 195 1848 Lay Road Wayne, PA 19087-0195 Delta, PA 17314 1
i 4
l RE0 VEST FOR ADDITIONAL INFORMATION PEACH BOTTOM ATOMIC POWER STATION. UNITS 2 AND 3 NRC BULLETIN 96-03 IMPLEMENTATION i
Please provide the following information:
1.
What is the maximum outside diameter (0.D.) on which insulation is installed? What is the pipe 0.D. in which the break is postulated?.
2.
Submit strainer preliminary / final design (areas, etc)?
3.
What head loss correlation will you use to estimate strainer head losses?
If you intend to use independent testing, have you developed plans for performance testing? Provide the details on the procedures and the head loss data (if available).
i 4.
Is the containment overpressure according to the plant current licensing basis? Define the plant current licensing basis.
5.
Provide additional information clarifying the use of the URG bump-up factor used to determine that doubling the corrosion product inventory will increase calculated head loss by approximately 18%.
Include your rational for using 1000 pounds of sludge rather than miscellaneous particulate debris (e.g., dirt and concrete dtst).
(Note that the bump-up factor is intended to estimate increased head loss associated with miscellaneous debris rather than corrosion products. The head loss increase associated with doubling the corrosion products should be estimated by doubling the corrosion product inventory in the appropriate head loss correlation and the head loss increase may well I
exceed 18% depending upon the correlation used and other conditions.)
6.
How did you determine the 176% estimate for the operational margin for the NUKON debris load.
Howdoesthismarginrelatetotheactuglstrainer sizing using the entire drywell inventory of NUKON (1800 ft ).
- Also, explain what you mean by operational margin.
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ENCLOSURE
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