ML20062A268

Amend 145 to License DPR-32,eliminating Present Operational Restrictions on Main Control Room & Emergency Switchgear Room Air Handling Units

ML20062A268
Person / Time
Site:	Surry
Issue date:	10/11/1990
From:	Berkow H Office of Nuclear Reactor Regulation
To:
Shared Package
ML20062A275	List: ML20062A268 ML20062A278
References
NUDOCS 9010190272
Download: ML20062A268 (8)

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i UNITED STATES -

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NUCLEAR REGULATORY COMMISSION l

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I VIRGINIA ELECTRIC AND POWER COMPANY DOCKET NO. 50-280 SURRY POWER STATION, UNIT NO. 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 145 License No. DPR-32 1.

The Nuclear Regulatory Comission (the Comission) has found that:

1 A.

The application for amendment by Virginia Electric and Power Company (the licensee) dated June 26, 1990, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Comission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will oserate in conformity with the application, i

the provisions of tie Act, and the rules and regulations of the Commission; i

C.

There is reasonable assurance (i) that the activities authorized l

by this amendment can be conducted without endangering the healtn and safety of the public, and (ii) that such activities will be conducted in compliance with the Comission's regulations; I

D.

The issuance of this amendment 'will not be inimical to the comon defense and security or to the health and safety of the public; and E.

The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.

2.

Accordingly, the license is amended by changes to the technical Specifications as indicated in the attachment to this license amendment, and paragraph 3.B of Facility Operating License No. DPR-32 is hereby amended to read as follows:

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(B) Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No.

, are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications.

3.

This license amendment is effective prior to Cycle 11 Startup.

FOR THE NUCLEAR REGULATORY COMMISSION H

ert N. Berkow, Director Project Directorate 11-2 Division of Reactor Projects - 1/II Office of Nuclear Reactor Regulation

Attachment:

Changes to the Technical Specifications Date of Issuance: October 11, 1990

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ATTACHMENT TO LICENSE AMENDMENT AMENDMENT NO. 145 FACILITY OPERATING LICENSE NO. DPR-32 i

DOCKET NO. 50-280

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Revise Appendix A as follows:

L Remove Pages Insert Pages TS 3.23-1 TS 3.23-1 TS 3.23-2 TS 3.23-2 TS 3.23-3 TS 3.23-3 TS 3.23-4 TS 3.23-4 TS 3.23-5 TS 3.23-5 t

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TS 3.231 g

- 3.23 MAIN CONTROL ROOM AND EMERGENCY SWITCHGEAR RO f

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' VENTILATION AND AIR CONDITIONING SYSTEMS Acolicability j

Applies to the main control room (MCR) and emergency switchgear room o

(ESGR) air conditioning system and emergency ventilation system.

Obiective To specify requirements to ensure the proper function of the main control r

and emergency switchgear room air conditioning system and emergency

'i ventilation system.

SDecification A.

Botn trains of the main control and emergency switchgear rooms' t

emergency ventilation system shall be operable whenever either unit is above cold shutdown.

8.

With one train of the main control and emergency switchgear room emergency ventilation system inoperable for any reason, return the inoperable train to a operable status within 7 days or be in at least Hot Shutdown within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in Cold Shutdown within the following 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

i C.

The main control and emergency switchgear room air conditioning l.

system shall be operable as delineated in the following:

1.

Chiller Refrigeration Units Chillers 1 VS E 4A, 48, and 4C must be operable a.

whenever either unit is above Cold Shutdown.

b.

If one chiller becomes -inoperable, return the inoperable chiller to operable status within seven (7) days or bring both units to Hot Shutdown within the next six (6) hours and be in Cold Shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

Amendment No.

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3 J 2, Air Handling Units (AHU) y U' nit 1 air handling. units,1 VS AC 1.1 VS AC 2,1-a-

VS AC 6, and.1-VS AC 7,. must be operable whenever Unit 1 is above Cold Shutdown; m

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.lf one Unit 1 AHU becomes inoperable, return I o

the' inoperable AHU to operable status within d

'seven (7) days or bring Unit 1 to Hot

-i Shutdown within the next six (6). hours and be 4

in Cold' Shut'down within' the following 130' t

hours.

i b.

Unit.2 air handling units, 2-VS AC 8 2 VS AC 9, 2-a i

~ VS AC 6, and 2 VS AC 7 must be operable.

whenever Unit 2 is above Cold Shutdown, a

1.

If one Unit 2 MCR AHU becomes inoperable, return the inoperable AHU to operable. status I

within. seven _(7) days or bring Unit.2 to Hot-

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Shutdown within the next six (6) hours and be-ij

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L in Cold Shutdown within the following 30 hcurs.

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u one Unit 2 ESGR AHU becomes inoperable. l J'e

. bring Unit 2 to Hot Shutdown within the next y

sixc(6) hours and be in Cold Shutdown within the following'30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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Unit 2 ESGR AHU drive motors, 2-VS FMO 6A, 2 L

VS FMO 68,2-VS FMO 7A, and 2 VS FMO 78 must l

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.'e be - operable - whenever. Unit-2 is above Cold

.p Shutdown.

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This interim specification is necessary until the air conditioning.

syste'm moc.fications scheduled for - 1991 are -completed.

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Following cor pletion of the permanent modifications,' a revised air conditioning system specification will be submitted.

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if a Unit 2 ESGR AHU drive motor becomes inoperable, return the inoperable drive motor-qj to operable status within seven,(7) days or.

bring Unit 2 to Hot Shutdown within six (6)-

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hours and be-in Cold Shutdown' within the ^

following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

Basis o

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' When the supply of. compressed bottled air is depleted, the main control n

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room and emergency switchgear room emergency ventilation system is j

.}m m'anually started to continue to maintain the control room pressure at the a

[ design positive pressure so that leakage is outleakage. One train of the g

,1 imain. control room emergency ventilation consists of one fan powered

's from an. independent emergency power source.

L The main control and emergt :y switchgear room emergency ventilt'lon

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J' system is designed to. filter the intake air to the control room pressure et envelope, which consists of the control room, relay rooms,. and t

emergency switchgear rooms'during a LOCA.

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.High efficiency (particulate air (HEPA)' filters are installed before the-Charcoal adsorbers-to prevent clogging of the iodine adsorbers. The-y

charcoal:adsorbers are installed to reduce the potential intake of radio-iodine to the' control ~ room. The in place test results should indicate a E

Lsystem leaktightness of less than 1. percent bypass leakage for the

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charcoal adsorbers and a HEPA efficiency 'of 'at least-99.5 percent q

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. removal of DOP particulates. The laboratory carbon sample test results

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'should indicate aLradioactive methyliodide removal efficiency of at least 95 percent for expected accident conditions. The control room dose i

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? calculations assume only 90 percent iodine removal efficiency for the air j

1lg passing through the charcoal filters. Therefore, if the efficiencies of the b,

HEPA.' filters and charcoal adsorbers are as specified, at the u

temperatures, flow rates and velocities within the design values of the K

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isystem, the'resulting doses.will be less than the allowable levels stated 4

in~ Criterion 19 'of the General Design Criteria for Nuclear Power Plants, it S},

t Appendix A to 10 CFR Part 50.

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Amendment No i 145 1

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t If the system is foun' to be inoperable, there is.no immediate threat to the d

' control room, and reactor operation may continue for a limited period of time.while repairs are being made. If the system cannot be repaired "within the specified time, procedures are initiated to establish conditions i

for wnich.the filter system is not required.

The : Main, Control' Room and Emergency - Switchgear Room Air Conditioning System cools the control room, the control room annex, and the-Units.1 and 2 emergency switchgear and relay rooms.- T.he air E

conditioning system. includes three chillers (1 VS E 4A,48, and 40) and eight air handling units (1 VS AC 1,2,6, and 7 and 2 VS AC 6,7,8, and 9).

a interim mo'difications were completed on the MCR and ESGR Air Conditioning-System to. address interim failure and increased cooling

. requirements for the: ESGRs.

The interim modifications included installation 'of redundant drive. motors and power supplies to the Units 1 y

and.2 ESGR AHUs and a redundant power supply-to the 1-VS E 48

• 1 chiller, Permanent modifications willincludo replacement of the CR and ESGR AHUs and installation of an additional chiller to supplement the i

existing chillers. The new higher capacity AHUs and additional chiller

'd EW Twill restore the redundancy.of the original system design.

a' The Unit 1-MCR and ESGR. AHUs have been replaced in the first phase f

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-of the permanent modification. The Unit 2 MCR and ESGR AHUs will be 1

. replaced during the next Unit.2 refueling outage. Y a result of the first phase: modifications, the following MCR-and ESGR Air Conditioning j

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. System equipment will be. required to operate to maintain design temperatures under maximum heat load calculations:

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. Two chillers i

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~ One Unit.1 MCR AHU and one Unit 1 ESGR AHU g

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One Unit 2 MCR AHU and two Unit 2 ESGR AHUs 1

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Continued system operating restrictions will be imposed on the MCR and ESGR Air Conditioning System until th'e permanent system upgrades are e

completed. The basis for the intenm restrictions is as followsf i

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.Taking-credible.-single = failures into consideration requires that redundant equipment be available during operation.' As such, the three chillers and the MCR and ESGR must be operable when at

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,.io power operation. Further, both drive motors on each Unit 2 ESGR I

l JAHU must be operable.

i In addition'to the equipment restrictions above, a fire watch will be-l L

. required during this interim' period in both unit's ESGF and MER #3 to

-l address Appendix R considerations.

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n-Amendment No.145

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