ML20206K168

Forwards RAI Re 981116 Request for License Amend to Change TSs Re Implementation of Sys for Detection & Suppression of Coupled neutronic/thermal-hydraulic Instabilities in Reactor at Plant,Unit 1.Response Requested by 990621

ML20206K168
Person / Time
Site:	Nine Mile Point
Issue date:	05/10/1999
From:	Hood D NRC (Affiliation Not Assigned)
To:	Mueller J NIAGARA MOHAWK POWER CORP.
References
TAC-MA4218, NUDOCS 9905130086
Download: ML20206K168 (5)

Text

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. Chief NuclearOfficer -

,  : Niagara Mohawk Power Corporation :

Nine Mile Point Nuclear Station -

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Operations Building, Second Floor P.O. Box 63 Lycoming, NY 13093' -

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED AMENDMENT ON THERMAL-HYDRAULIC STABILITY, NINE MILE POINT NUCLEAR STATION, UNIT NO.1 (TAC NO. MA4218)-

Dear Mr. Muener:

By letter dated November 16,1998, Niagara Mohawk Power Corporation (NMPC) requested a hcense amendment to change the Technical Specifications regarding the implementation of systems for the detect 6on and suppression of coupled neutronic/ thermal-hydraulic instabilities in the reactor at Nine Mile Point Nuclear Station, Unit No.1. We are reviewing your request and find that additional information, identified in the enclosure, is needed.

The schedule for responding to this letter was discussed with Mr. J. Thuotte and others of your organization Based upon that discussion, a mutually agreeable response date is June 21,1999.

If you have questions regarding this letter or are unable to meet this response schedule, please contact me by phone on (301) 415-3049 or by electronic mail at dsh@nrc. gov.

Sincerely, Original signed by:

Darl S. Hood, Sr. Project Manager, Section 1

Project Directorate 1-1 Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-220

Enclosure:

Request for Additional Information g i'

- cc w/ encl: See next page h.

DISTRIBUTION:

6 SBajwa OGC MWaterman JZwolinski/SBlack j PUBLIC SLittle ACRS JWermiel JCalvo PDI-1 R/F ~ DHood S. Barber, RI THuang DOCUMENT NAME: G:\NMP2\RAIA4218.WPD To receive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure "E" = Copy with attachment /ent,'osure "N" = No copy _

• Previous concurrence OFFICE Pel: POI 1- lE LA: POI-10Q l' DIPOI 1 - ,

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,- Mr. John H. Mueller Fby 10,1999 Ch';f Nucle:r Officer

( Niag:ra Mohawk Power Corporction Nine Mile Point Nuclear Station Operations Building, Second Floor P.O. Box 83 Lycoming, NY_13093

SUBJECT:

REQUEST FOR ADDITIONALINFORMATION REGARDING PROPOSED AMENDMENT ON THERMAL-HYDRAULIC STABILITY, NINE MILE POINT NUCLEAR STATION, UNIT NO.1 (TAC NO. MA4218)

Dear Mr. Mueller By letter dated November 16,1998, Niagara Mohawk Power Corporation (NMPC) requested a license amendment to change the Technical Specifications regarding the implementation of systems for the detection and suppression of coupled neutronic/ thermal-hydraulic instabilities in the reactor at Nine Mile Point Nuclear Station, Unit No.1. We are reviewing your request and find that additional information, identified in the enclosure, is needed, j i

The schedule for responding to this letter was discussed with Mr. J. Thuotte and others of your organization. Based upon that discussion, a mutually agreeable response date is

- June 21,1999.

If you have questions regarding this letter or are unable to meet this response schedule, please contact me by phone on (301) 415-3049 or by electronic mail at dsh@nrc. gov.

Sincerely, Original signed by:

Darl S. Hood, Sr. Project Manager, Section 1 Project Directorate I 1 Division of Licensing Project Management 4 Office of Nuclear Reactor Regulation j Docket No. 50-220

Enclosure:

Request for Additional i Information j i

cc w/ encl: See next page  !

DISTRIBUTION: I Docket File SBajwa OGC MWaterman JZwolinski/SBlack PUBLIC SLittle ACRS JWermiel JCalvo l PDl-1 R/F DHood S. Barber, RI THuang i l

DOCUMENT NAME: G:\NMP2\RAIA4218.WPD l To receive a copy of this document, indicate in the box: "C" = Copy without attachment / enclosure "E" = Copy with  !

attachment / enclosure "N" = No copy .

' Previous concurrence  ;

0FFICE PM:PO! 1 lE LA:P01401 I D:PDI 1 , l BC:SRXB* lE BC:EICB* l NAME DNood/lcc .t)J N SU MlV SBajwa NMD M rmiel JCalvo  ;

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V,, j # May 10,1999 Mr. John H. Mueller. ,

Chief Nuclear Officer '

~ Niagara Mohawk Power Corporation.

Nine Mile Point Nuclear Station Operations Building, Second Floor

P.O. Box 63 1 Lycoming, NY 13093 '

~

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED 4 AMENDMENT ON THERMAL-HYDRAULIC STABILITY, NINE MILE POINT NUCLEAR STATION,' UNIT NO.1 (TAC NO. MA4218) <

Dear Mr. Mueller.

By letter dated November 16,1998, Niagara Mohawk Power Corporation (NMPC) requested a license amendment to change the Technical Specifications regarding the implementation of

. systems for the detection and suppression of coupled neutronic/ thermal-hydraulic instabilities in the reactor at Nine Mile Point Nuclear Station, Unit No.1. We are reviewing your request  ;

and find that additional information, identified in the enclosure, is needed. '

The schedule for responding to this letter was discussed with Mr. J. Thuotte and others of your organization. Based upon that discussion, a mutually agreeable response date is

. ' June 21,1999.

If you have questions regarding this letter or are unable to meet this response schedule, .

e please contact me by phone on (301) 415-3049 or by electronic mail at dsh@nrc. gov.

. Sincerely, l La /h4 Darl S. Hood, Sr. Project Manager, Section 1 Project Directorate 1-1

!- Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-220 l

Enclosure:

~ Request for Additional information

. cc w/ encl: 'See next page L

7; ,

Nine Mile Point Nuclear Station Unit No.1 Regional Administrator, Region i U.S. Nuclear Regulatory Commission

,475 Allendale Road -

King of Prussia, PA 19406 Resident inspector U.S. Nuclear Regulatory Commission P.O. Box 126 Lycoming, NY 13093 Chailes Donaldson, Esquire Assistant Attomey General New York Department of Law 120 Broadway New York, NY 10271 Mr. Paul D. Eddy State of New York Department of Public Service

-Power Division, System Operations 3 Empire State Plaza Albany, NY 12223 Mr. F. William Valentino, President New York State Energy, Research, and Development Authority Corporate Plaza West 286 Washington Avenue Extension Albany, NY. 12203-6399 Mark J. Wetterbahn, Esquire Winston & Strawn

'1400 L Street, NW Washington, DC 20005-3502

. Gary D.' Wilson, Esquire Niagara Mohawk Power Corporation

'300 Erie Boulevard West Syracuse, NY 13202 Supervisor Town of Scriba Route 8, Box 382 Oswego, NY 13126

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REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED TECHNICAL SPECIFICATION CHANGE CORE THERMAL-HYDRAULIC STABILITY NIAGARA MOHAWK POWER CORPORATION NINE MILE POINT NUCLEAR STATION. UNIT NO.1 DOCKET NO. 50-220 Please provide the following additional information regarding your application for license amendment dated November 16,1998, to change the Technical Specifications (TSs) on the implementation of systems for the detection and suppression of coupled neutronic/ thermal-hydraulic instabilities in the reactor at Nine Mile Point Nuclear Station, Unit No.1 (NMP1):

Reactor Systems Branch

1. Provide a schematic showing the approved ELLLA region versus the power / flow restriction rs#.m. ~ Describe the relationship in terms of the necessity of the increment of 2% for the APRM flow-biased neutron flux scram setting and 7% for APRM rod block trip settings. Justify that these proposed TS changes are stillwithin the approved ranges of the NMP1 stability

-long-term solution ll proposed in GENE-A13-00360-02.

2. Desenbe the relationship between the supporting document, NEDC-32696P, and the proposed TS changes. Since this topical report has not been submitted to the NRC for review / approval, explain why you believe it can, nevertheless, be used to support the proposed license amendment.

3. Provide the technical basis for changing the channel accuracy in the TS from 2% to +2%/-

1.9% . Discuss the significance of this new expression of uncertainty with respect to reactor power operation.~

s Electrical & Instrumentation and Controls Branch

4. Please supplement your submittal of November 16,1998, to address the list of criteria in Supplement 2 of Topical Report NEDC-32339P-A, " Reactor Stability Long-Term Solution:

Enhanced Option I-A, Solution Design." Specifically, confirm that the plant specific environmental conditions (temperature, humidity, pressure, seismic, and electromagnetic compatibility) are enveloped by the E1 A equipment environmental qualification values.

5.1 Please clarify whether you intend to apply the " shakedown" period allowed for this

_ equipment.. (We note that the licensee for the Brunswick plant installed the E1A and needed to make plant-specific revisions to the equipment to prevent spurious trips and alarms.)

Enclosure j