ML20086J541

Application for Amend to License DPR-35,revising Section 3/4.9, Auxiliary Electrical Sys,To Incorporate Surveillance for Inverters Associated W/Hpci & RCIC Sys

ML20086J541
Person / Time
Site:	Pilgrim
Issue date:	12/06/1991
From:	Richard Anderson BOSTON EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20086J546	List: BECO-91-150, Revised Proposed Tech Spec Re Auxiliary Electrical Sys ML20086J541
References
BECO-91-150, NUDOCS 9112110329
Download: ML20086J541 (4)

Text

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. 10CFR50.90 ff BOSTON EDISON Pdgom Nuclear Power Staton Rocky Hal Road  !

Plymouth, Massachuretts 02360 i i

December 6.1991 R, A Andwoon BECo 91-150  !

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U.S. Nuclear Regulatory Connission -

Document Control Desk Washington, DC 20555 4 Docket 50-293 Proposed Change to the Auxiliary _ '

Electrical lystem Technical Soecificationt Boston Edison Company proposes the attached change to the Pilgrim Nuclear Power Station Technical Specifications. These changes revise Section 3/4.9, Auxiliary Electrical System, to incorporate a surveillance for-the inverters associated with-the High Pressure Coolant Injection (HPCI) and Reactor Core Isolation Cooling-(RCIC) Systems. It addresses an October 17, 1991, BECo verbal commitment to the NRC.

Several minor editorial changes are also included in this submittal to improve

-the clarity of Technical Specifications.

The requested changes are described in Attachment.A and the revised Technical t Specification pages are in Attachment B. Attachment C provides existing pages '

marked-up to show the proposed changes.

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R'l A.' Anderson t PHK/ cab /6458

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Attachments i cc: _ See next page Commonwealth of Massachusetts) ngo/

County of Plymouth ) l'l #ff_

Then personally appeared before me, Roy A. Anderson, who being duly sworn, did i

state that he is Vice President & Station-Director Nuclear Operations-of Boston L . Edison Company and that he~1s duly authorized to execute and file the submittal.

contained herein in the name and on behalf of Boston Edison Company and that

-the statements in said submittal are true to the best of his knowledge and belief.

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DATE -NOTARY PUBLIC 91121103?9 911206 DR g 2[ 5 ADOCK --0500' 0 - . .-. - - .-. .. - . _ - - . - . - .

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BOSTON EDISON COMPANY Page 2 U. S. Nuclear Regulatory Commission cc: Mr. R. Eaton, Project Manager )

DivisionofReactorProjects-I/II '

Office of Nuclear Reactor Regulation Mail Stop: 1401 i U. S. Nuclear Regulatory Commission 1 White Flint North 11555 Rockville Pike Rockville. HD 20b52 U. S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 l Senior NRC Resident Inspector l Pilgrim Nuclear Power Station Mr. Robert M. Itallisey, Director Radiation Control Program Massachusetts Dei-rtment of Public Health 305 South Street Jamaica Plain, MA 02130 l-

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4 ATTACHMENT A 10 BECO 91-1so E0020.12d Change _ip_Auttliity Electrical $yttem Technic 1LSnct f1 cations Erpoosed Chane This change revises Pilgrim Nuclear Power Station (PNPS) Technical Specifications by adding a new surveillance requircment to Section 3/4.9, Auxiliary Electrical System, and adding material to the Bases Section providing a reason for the new t.urvelliance.

Several editorial changes are included to ih@ rove the clarity of Technical Specifications.

Reason for Chanag-Boston Edison Company (DECO) proposes this change to address our verbal commitment of October 17, 1991, to perform a periodic surveillance of the inverters in the control systems of the Reactor Core Isolation cooling (RCIC) and High Pressure Coolant Injection (HPCI) Systems.

No Sianificant Hazards Consideration and S3Btiv Evaluation The Commission has provided standards for determining whether a significant hazards consideration exists [10CFR50.92(c)]. A proposed amendment to an operating license for a fdcility involves no significant hazards consideration if operation of the facility in accordance with the proposed amendment would not: (1) involve a significant increase in the probability or consequences of an accident previously evaluated, or (2) create the possibility of a new or different kind of accident from cny accident previously evaluated, or (3) involve a s y nificant reduction in a margin of safety.

BECo has determined the proposed change does not involve a significant hazards consideration based on the following analysis:

1) The proposed r.hange does not involve a significant increase in the probability or consequences of an' accident previously evaluated, The proposed change adds a surveillance to Technical Specifications concerning the electrical inverters associated with the HPCI and RCIC systems. These inverters provide power to the flow control mechanisms of these systems.

Loss of the RCIC inverter results in a minimum flow condition. Loss of the HPCI inverter results in HPCI going to zero flow. The inverters have an automatic reset. After the inverters reset, RCIC flow returns to normal and HPCI restarts. The operation of PNPS in accordance with the proposed surveillance will not alter the function or configuration of the subject inverters or the HPCI and RCIC Systems. The surveillance will be performed during the verification of operability of the auxiliary electrical system and will not be performed during power operation.

Hence, this new surveillance will be performed when the HPCI and RCIC systems are not required and it will not involve an increase in the probability or consequences of an accident previously evaluated.

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2) 1he proposed change does not create the possibility of a new or different kind of accident from any accident previously evaluated. The proposed change does not change the configuration or function of PNPS and involves surveillance activities to be performed wnen the associated systems are not required. Therefore, operating PNPS in accordance with the proposed change does not create the possibility of a new or different kind of accident from any accident previously evaluated. l 1

3) The proposed change does not involve a significant reduction in a margin of safety. The proposed change adds a surveillance intended to ensure the operability of existing equipment (i.e., the inverters associated with the HPCI and RCIC Systems). The proposed change does not modify the configuration, function, or setpoint of the inverters or the associated systems. Hence, operating PNPS in accordance with the prnposed change does not involve a significant reduction in a margin of safety.

This change was reviewed and its approval recommended by BECo's Operations Review Committee., it was also reviewed by the Nuclear Safety Review and Audit Committee. j

$dtehle for Chanae These changes will be implemented within 30 days of BECo's receipt of approval l by the NRC.

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