ML20044H082

Informs That Listed Addl Info Needed to Complete Review of Util 921125 Proposed Amend to TS to Permit Fixed Incore Detectors to Be Utilized to Perform TS Surveillances. Response Requested by 930615

ML20044H082
Person / Time
Site:	Seabrook
Issue date:	05/28/1993
From:	De Agazio A Office of Nuclear Reactor Regulation
To:	Feigenbaum T NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO)
References
SEA-93-011, SEA-93-11, TAC-M85020, NUDOCS 9306070363
Download: ML20044H082 (4)

Text

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.s EI (l E UNITED STATES (h'g,p

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WASHINGTON, D.C. 2055MX)01 May 28, 1993 Docket No. 50-443 SEA-93-011 i

l Mr. Ted C. Feigenbaum Senior Vice President, and Chief Nuclear Officer North Atlantic Energy Service Corporation Post Office Box 300- _

Seabrook, New Hampshire 03874

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (TAC NO. M85020).

By letter dated November 25, 1992, North Atlantic Energy Service Corporation i

submitted a proposed amendment (License Amendment Request 92-14) to the l

Seabrook Station Technical Specifications that would permit the fixed incore L

detectors to be utilized to perform technical specification surveillances by incorporating the fixed incore detectors into the definition of the incore detector system. Report YAEC-1855P, "Seabrook Station Unit 1 Fixed Incore-l l

Detector System (FIDS) Analysis", was submitted to support the proposed amendment.

We are reviewing the proposed amendment and the supporting information, but for us to complete our review, the following information related to YAEC-1855P is required:

j 1.

A description of your software QA testing program for the fixed incore detector system data acquisition and processing software.

2.

A description of the software modifications required-for modeling platinum

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detectors that were made to the previously-reviewed CASMO-3/ SIMULATE-3

'l code package and a discussion of the benchmarking results.

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3.

It is stated that 25% of' the tota 1' detector: signal is derived from neutron flux response. ~ How much of the signal is due tof the response to thermal; neutrons alone? How does the thermal and total > neutron flux response vary 4

with core residence lifetime? How are multibundle effects represented?

4.

If it is not necessary to treat the effects of platinum depletion, present a quantitive numerical analysis on why this.effect can be neglected.

5.

An explanation of why the ratios of fixed / movable inferred " measured" Fy (Table 5.6) and F (Table 5.7) decrease with cycle exposure. -Does this indicate a burnup. dependent bias between the fixed and movable incore.

detector signal-to-power conversion methodologies?.

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Mr. Ted C. Feigenbaum May 28, 1993 Please provide your response no later than June 15, 1993. The requiremerits of this letter affect one respondent, and therefore, are not subject to Office of Management and Budget review under P.L.96-511.

Sincerely, Original siged by:

Albert W. De Agazio, Sr. Project Manager Project Directorate I-4 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page Distribution:

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Mr. Ted C. Feigenbaum May 28,.1993 Please provide your response no later than June 15,1993. The requirements of this letter affect one respondent, and therefore, are not subject to Office of.

Management and Budget review under P.L.96-511.

Sincerely,

)

Albert )K De Agazio,

r. Project Manager Project Directorate I-4' Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation-t cc: See next page l

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Mr. Ted C. Feigenbaum Seabrook Station cc:

Thomas Dignan, Esq.

Mr. George L. Iverson, Director John A. Ritsher, Esq.

New Hampshire Office of Emergency Ropes and Gray Management One International Place State Office Park South Boston, Massachusetts 02110-2624 107 Pleasant Street Concord, New Hampshire 03301 Mr. Peter Brann Assistant Attorney General Regional Administrator, Region I i

State House, Station #6 U.S. Nuclear Regulatory Commmission Augusta, Maine 04333-475 Allendale Road King of-Prussia, Pennsylvania 19406' Resident Inspector U.S. Nuclear Regulatory Commission Office of the Attorney General Seabrook Nuclear Power Station One Ashburton Place Post Office Box 1149 20th Floor Seabrook, New Hampshire 03874 Boston, Massachusetts 02108 Jane Spector Board of Selectmen Federal Energy Regulatory Commission Town of Amesbury 825 North Capital Street, N.E.

Town Hall Room 8105 Amesbury, Massachusetts 01913 Washington, DC 20426 i

Mr. Jack Dolan Federal Emergency Management Agency l

Mr. T. L. Harpster Region I l

North Atlantic Energy Service

'J W.. McCormack Post Office &

Corporation Courthouse Building, Room 442 i

Post Office Box 300 Boston, Massachusetts 02109 Seabrook, New Hampshire 03874 Mr. David Rodham, Director Massachusetts Civil Defense Agency Town of Exeter

- 400 Worcester Road 10 Front Street Post Office Box 1496 Exetar, New Hampshire 03823 Framingham, Massachusetts 01701-0317 ATTN: James.Muckerheide

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l Gerald Garfield, Esq.

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Day, Berry and Howard John P. Arnold, Attorney General City Place G. Dana Bisbee, Associate Attorney Hartford, Connecticut 06103-3499 Generalr l

Attorncy General's Office l

Mr. R. M. Kacich 25 Capitol Street Northeast Utilities Service Company Concord, New Hampshire 03301' Post Office Box 270-Hartford, Connecticut 06141-0270 Mr. Robert Sweeney Bethesda Licensing Office Suite 610 3 Metro Center Bethesda, Maryland 20814 t

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