ML20091A523

License Amend Request 91-07 to License NPF-86,changing TS to Decouple Third Integrated Leak Rate Test from 10-yr Inservice Insp

ML20091A523
Person / Time
Site:	Seabrook
Issue date:	03/23/1992
From:	Feigenbaum T PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:
Shared Package
ML20091A521	List: ML20091A517 ML20091A523 ML20091A529
References
91-07, 91-7, NUDOCS 9203270259
Download: ML20091A523 (3)

Text

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.51 S SEABROOK STATION UNIT 1 summmmmmmmmmmma New Hampshire Yankee WRM d 1. M_4t Facility Operating Ucense NPF Docket No. S0-443 License Amendment Request No.-91-07; Decoupling the Third Integrated Leak Rate Tert From the .10-Year Inservice Inspection 4

This License Amendment Requeu is submitted by New Hampshire Yankee

pursuant to 10 CFR50.90. The following information is enclosed in support of this License Amendment Request:

.Section I -

Introduction and Description of Proposed Changes

. Section ll -

Markup of Proposed Changes

. Section lli -

Retype of Proposed Changes

.Section IV -

Safety Evaluation of Proposed Changes

.Section V -

Determination of Significant Hazards for Proposed Changes

.Section VI -

Proposed Schedule for License Amendment Issennce and Effectiveness n .Section VII -

Environmental Impact Assessment 8

as 0'O Sworn and Subscribed 0x to before me this

$8 gind. day of '17//7 M / _3

,1992 h 46 A6W~

Oa: y_ 97 N /7. b / d h/ u.'!d Ted Q(Felgenbaum k 0 Notary Public President and' Chief Executive Officer TPACY A Decinc:00 l'?: y PuNe ih Ccmmi:=, ng c; oma ;, a

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1. Introduction and Description of PronoseJ Channes A. Introduction Seabrook Station Technical Specification Surveillance Requirement 4.6.1.2 provides the schedule by which primary containment leak rates are to be demonstrated. Surveillance Requirement 4.6.1.2.a specifically requires that three Type A Integrated Conteinment Leak Rate Tests be conducted at 401 10 month intervals during shutdown during each 10 year service period. Thia Surveillance Requirement also states that the third Type A test of each set shall be conducted during the shutdown for the 10 year plant inservice inspection.

License Amendment Request 91-07 proposes to change Technical Specification Surveillt.nce Requirement 4.6.1.2.a to maintain a Type A Integrated Containment Leak Rate testing schedule of 401 10 month intervals, but eliminate the requirement to perform three Type A tests in each 10 year service period. This amendment request also proposes to decouple cach third Type A test in a 10 year service period from the 10 year plant inservice inspection shutdown. In accordance with the ASME Code [lWA 2400(b)}, the 10 year plant inservice inspection period starts when commercial service begins, Seabrook Station's first '

and second Type A Integrated Ccntainment Leak Rate Tests were conducted in March 1986 and November 1989, respectively. These tests were performed in anticipation of receipt of 1 the zero power and full power operating licenses, respectively. Both of these tests _were I performed prior to commercial service, which occurred in August 1990. In order to maintain the 40 10 month interval requirements, Seabrook Station's third Type A Integrated Containment Leak Rate Test will be performed during the second refueling outage, which is scheduled to begin in September 1992. Due to the delay in receiving the full power operating license this third test will not coincide with the 10-year plant inservice inspection shutdown, which is scheduled for the 1999 2000 refueling outage. This will be inconsistent with the current Technical Specification surveillance requirement which does not distinguish between pre operational and periodic Type A tests. The proposed-license amendment will continue to ensure that the overall integrated containment leakage rate is maintained within Technical Specification limits, therefore, no adverse safety consequences are introduced.

Similar license amendments have been granted by the NRC to the Southern California Edison Company, for San Onofre Nuclear Generating Station, . Unit . Numbers'2 and 3.

B, Description of Proposed Changes License Amendment Request 91-07 proposes to change Technical Specification Surv_cillance Requirement 4,61.2.a to maintain the existing Type A testing interval of 40.*

10 months but climinate the requirement to perform three Type A tests in each 10-year service period. This change will also eliminate the requirement that each third Type. A.

Integrated Containment Leak Rate Test in a 10-year service period be performed coincident-with the 10-year plant inservice inspection shutdown. Surveillance . Requirement 4.6.1.2.a currently states:

' "Three Type A tests - (Overall Integrated - Containment Leakage Rate) 4 hall be conducted at 401 _ 10 month-intervals during shutdown' at a pressure not less 'than P., 49.6 ' psig, during each 10 year' service period. - The third test of each set shall be conducted during- the shutdown for the 10-year plant inservice inspection,"

1

License Amendment Request 9107 proposes to delete the reference to *Three" Type A tests and 'during each 10-year service period."- The last sentence of this surveillance, which states -

that the third test of each set shall be conducted during the shutdown for the 10-year plant "

inservice inspection, will also be deleted. With the aforementioned- changes, the revised Technical Specification Surveillance 4.6.1.2.a will ensure that Type A Integrated Containment Leak Rate Tests will be conducted at 401 10 month intervals during shutdown at a pressure not less than P., 49.6 psig. License Amendment Request 9107 does not change any other _

containment testing or surveillance requirements.

II. Markun of Proposed Channes See attached markup of proposed changes to the Technical Specifications.

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