ML20011A112

Application to Amend License DPR-35,consisting of Proposed Change 81-06,changing Tech Spec Section 3.7.B Re Standby Gas Treatment Sys & Control Room High Efficiency Air Filtration Sys.Class III Amend Fee Encl

ML20011A112
Person / Time
Site:	Pilgrim
Issue date:	09/30/1981
From:	Howard J BOSTON EDISON CO.
To:	Ippolito T Office of Nuclear Reactor Regulation
Shared Package
ML20011A113	List: ML20011A112 ML20011A115
References
81-230, NUDOCS 8110070274
Download: ML20011A112 (4)

Text

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BOETON ED63ON COMPANY B00 BOYt.sTON STREET BDaTON. massachusetts 02199 J. EDWARD HOWARD 3.....,

September 30, 1981 BECo. Ltr. #81-230 g ,% I,g Proposed Change No. 81-06 l r Mr. Thomas A. Ippolito, Chief 6 N- J{L mT

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Operating Reactors Branch #3 Division of Operating Reactors g L t >

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Si Office of Nuclear Reactor Regulation O m OCT 61981* wmu U.S. Nuclear Regulatory Commission r',\ " #omat cow Washington, D. C. 20555 \ ,

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J License No. DPR-35 Docket No. 50-293 Proposed Change to Technical Specifications on Standby Gas Treatment System and Control Room High Efficiency Air Filtration System

Dear Sir:

Introduction Pursuant to Section 50.90 of the Commission's Rules and Regulations, Boston Edison Company hereby proposes the following modification to Appendix A of Operating License No. DPR-35 Proposed Change The proposed change is applicable to the following Pilgrim Station Limiting Conditions for Operation.

3.7.B. 1 Standby Gas Treatment System (Page 158)

c. From and after the date that one train of the Standby Gas Treatment System is made or found to be inoperable for any reasca, continued reactor operation or fuel handling is per-missible only during the succeeding seven days providing that within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and daily thereafter, all active components of the other standby gas treatment train shall be demonstrated fl to be operable, foOI s 3.7.B. 1. Standby Gas Treatment System (Cortinued) (Page 158A) f

e. Except as specified in 3.7.B.1.c, both trains of the standby iN/cAEch!

gas treatment system shall be operable during fuel handling operations. If the system is not operable fuel movement shall ho.oo hhgO b g o!0 23 not be started (any fuel assembly movei. ant in progress may be P PDR completed).

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• l CD; TON EDCON COMPfcNY Mr. Thomas A. Ippolito, Chief '

September 30, 1981 Page 2 3.7.B. 2. Control Room High Efficiency Air Filtration System (Page 1588)

a. Except as specified in Specification 3.7.B.2.c below, both trains of the Control Room High Efficiency Air Filtration System used for the processing of inlet air to the control room under accident conditions and the diesel generator (s) required for operation of each train of the system shall be operable whenever secondary containment integrity is required and during fuel handling operations.

3.7.B. 2. Control Room High Efficiency Air Filtration System (Continued)

c. From and after the date that one train of the Control Room High Efficiency Air Filtration System is made or found to be incapable Of supplying filtered air to the control room for any reason, reactor operation or refueling operations are pemissible only during the succeeding 7 days. If the system is not made fully operable within 7 days, reactor shutdown shall be initiated and the reactor shall be in cold shutdown within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> and irradiated fuel handling operations shall be terminated within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. (Fuel handling operations in progress may be completed).

The proposed change consists of adding a footnote, applicable to each of the above Limiting Conditions of Operation which providesconditional relief from each LC0 for the period October 3, 1981 to October 19, 1981.

Rec,on For Change A recent engineering analysis, performed in response to IE Bulletin #80-11 "Masonary Wall Design" has revealed that a masonary wall located at el. 51' in the Turbine Building will not retain its structural integrity following certain design basis events; High Energy Pipe Break Outside Containment, Tornado Depressurization and Seismic. Failure of this wall would impact, ateng other equipment, a cable raceway which contains power cables for Standby Gas Treatment System A and Control Room High Efficiency Air Filtration System A. Loss of these power cables would render each of these systems inopsrable. Other impacted systems are not required operable during present modes of plant operation.

A corrective design modification has been developed to remedy the wall's design deficiency. This design package is presently within the final approval process.

Implementation of these modifications shall require a minimum of 17 days for completion. Fuel unloading is presently scheduled to commence on October 3 (removal of the central cell to facilitate inspection of the Core Spray Spargers between October 4 and October 8) with the remainder of the core unloaded between October 8 and October 19, 1981.

During this period of conditional relief from the stated sections of Technical Specifications, Boston Edison shall implement the following interim actions to address each casign base event of concern.

EdLTON EDCON COMPANY Mr. Thomas A. Ippolito, Chief September 30, 1981 Page 3 High Energy Pipe Break Detside Containment _

' This event has no potential impact upon system operability while the reactor is in the cold shutdown and the refueling mode.

Tornado Depressurization A temporary operating procedure shall be issued which required tennination of irradiated fuel handling operations in the event a Tornado Warning is issued for the immediate area. (A fuel handling operation in progress may ba completed)

Seismic To assure availability and operability of the non-impacted trains of the Standby Gas Treatment System and Control Room High Efficiency Air Filtration System, these systems shall be continuously operated during all irradiated fuel handling activities. A temporary procedure shall be issued which delineates instructions for the operating personnel to ascertain system operability and which requires termination of irradiated fuel handling operations should either of the continually running systems be found or made to be inoperable.

This proposed mode of operations provides an additional level of confidence in the availability of the equipment designed to mitigate the consequences of a fuel drop accident. This conservatism is apparant when compared to Bases 3.7.B.1.

"Only one of the two Standby Gas Treatment Systems (SBGTS) is needed to maintain the secondary containment at a 0.25 inch of water negative pressure upon contain-ment isolation. If one system is found to be inoperable, there is no imediate threat to the containment system performance and reactor operation or refueling activities may continue while repairs are being made. In the event one SBGTS is inoperable, the redundant system will be tested daily. This substantiates the availability of the operable system and justifies continued reactor or refueling operations."

Safety Considerations The proposed changes have been reviewed and the Safety Evaluation is provided in Attachment B. The Safety Evaluation concluded that the proposed change does not represent an unreviewed safety question and there is reasonable assurance that the public hbalth and safety will not be endangered. The proposed change has been reviewed and approved by the Operations Review Committee and reviewed by the Nuclear Safety Review and Audit Comittee.

BO3TObe F.Cl!O N COMPANY Mr. Thomas A. Ippolito, Chief September 30, 1981 Page 4 Schedule of Change Boston Edison Company requests expeditious approval of this proposed Technical Specification in order that it may be put into effect between October 3 and October 19, 1981.

Fee Consideration In accordance with Section 170.12 of the Commission's Regulations, Boston Edison -

proposes this license change as Class III. Accordingly a check for Four Thousand Dollars ($4,000) is enclosed.

Your immediate attention to this request would be greatly appreciated.

Very truly yours, N

j 3 signed originals and 37 copies Commonwealth of Massachusetts)

County of Suffolk )

Then personally appeared before me J. Edward Howard, who, being duly sworn, did state that he is Vice President - Nuclear of Boston Edison Company, the applicant herein, an! that he is duly authorized to execute and file the sub-mittal r.ontained 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.

My Commission expires: off $, /ff// M'f.a 0Vfr $dt)>

Notafy Public~ /

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