ML20128E135
| ML20128E135 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 02/03/1993 |
| From: | Andersen J Office of Nuclear Reactor Regulation |
| To: | Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| TASK-2.F.1, TASK-TM NUDOCS 9302100320 | |
| Download: ML20128E135 (4) | |
Text
_ _ _ _ _
February 3, 1993 Docket No. 50-245 Q111.tttatiqDi Docket File-...'
NRC & Local PDRs PD I-4 Plant Mr. John F. Opeka SVarga Executive Vice President, Nuclear JCalvo Connecticut Yankee Atomic Power Company SNorris Northeast Nuclear Energy Company JAndersen Post Office Box 270 OGC Hartford, Cor.necticut 06141-0270 ACRS (10)
LTDoerflein, RI
Dear Mr. Opeka:
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION FOR THE POST ACCIDENT CONTAINMENT HYDROGEN MONITORING REVIEW (TAC NO. M83986)
As discussed with your staff on January 22, 1993, enclosed is information which is requested to support the NRC staff's review of the postaccident containment hydrogen monitor issue (TMI Action Plan item II.F.1.6) at Millstone Unit No. 1.
We request that the information be provided as soon as possible. Thank you for your assistance in this matter.
This requirement affects one respondent, and, therefore, is not subject to Office of Management and Budget review under P.L.96-511.
Sincerely, Original signed by James W. Andersen, Acting Project Manager Project Directorate I-4 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation
Enclosure:
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_ February 3,'1993 Docket No.-50-245'
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-1 Nr. John F. Opeka -.
Executive Vfce President, Nuclear Connecticut Yariee Atomic Power Company Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06141-0270
Dear Mr. Opeka:
SUBJECT:
MILLSTONE NUCLEAR POWER STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION FOR THE POST ACCIDENT _ CONTAINMENT HYDROGEN MONITORING o
REVIEW (TAC NO. M83986)-
As discussed with your. staff on January 22, 1993, enclosed is information which is requested to support the NRC staff's review of the postaccident containment hydrogen monitor _ issue (TMI Action Plan Item. II.F.1.6) at.
Millstone Unit No. l.
We request that the-information be provided'as soon asi possible. Thank you for your assistance in' this matter.
This requirement affects one respondent, and, therefore, is-not' subject't'o'.-
Office of Management and Budget review under P.L.96-511.
Sincerely,
{-
i James.W.-Andersen, Acting Project Manager-Project: Directorate I-4.
- Division of Reactor Projects'.I/II Office 'of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:-
See.next page-
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s Mr. John F 'Opeka.
Millstone Nucloar Power Station
- Northeast.-' Nuclear-Energy Company Unit-1
.cc: '
Gerald Garfield, Esquire
- R.-M. Kacich,' Director-
= Day,. Berry and_Howard Nuclear LicensingL Counselors'at law.
Northeast Utilities Service ^ Company-City Place-Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270-W. D. Romberg,'Vice President D. O. Nordquist:
Nuclear, Operations Services Director of Quality Services
-Northeast Utilities Service Company Northeast-Utilities. Service Company:
Post Office Box 270 Post Office Box 270 Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270L Kevin McCarthy, Director Regional Ada aistrator Radiation Control Unit-
. Region I Department of Environmental Protection U.S. Nuclear Regulatory Commission State Office Building -
475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania;19406L Allan-Johanson, Assistant Director First Selectmen Office of Policy and Management Town of Waterford
. Policy Development- & Planning Division Hall of Records 80 Washington Street 200 Boston Post-Road Hartford, Connecticut 06106 Waterford, Connecticut 06385j S. E. Scace, Nuclear Station Director P. D. Swetland,.-Resident Inspector Millstone Nuclear Power Station-Millstone Nuclear Power. Station Northeast Nuclear Energy Company.
c/o U.S. _ Nuclear Regulatory Commission.-
Post.0ffice Box 128.
Post Office Box 513-Waterford, Connecticut 06385 Niantic, Connecticut 06357 H.' F. Haynes, Nuclear Unit Director Millstone Unit-No'. 1 Northeast Nuclear-' Energy Company Post Office-Box 128-Waterford,' Connecticut 06385 Nicholas'S. Reynolds Winston & Strawn-11400 L: Street, NW-
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RE0 VEST FOR INFORMAT103 RELATED TO POST ACCIDENT CONTAINMENT HYDROGEN MONITOR TMI ACTION PLAN ITEM II.F.1.6-00CKET NO. 50-245-This request for information includes the following:
1.
Provide an estimate of the core damage frequency for_each of the three assumed scenarios (inerted containment, de-inerted containment, and beyond design basis accident) for the current plant condition (i.e.,
one hydrogen monitor).
2.
Provide an estimate of the core damage frequency for each of the three assumed scenarios for two hydrogen monitors (the existing monitor and assumed backup).
3.
Provide the-offsite population exposure in terms of man-rem assuming total failure of the containment, with one hydrogen monitor.
4.
Provide an uncertainty analysis of the above three estimates.
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