Text

Proposed Tech Spec 3/4.7.6, Control Room Area Ventilation Sys
	ML19354D923
Person / Time
Site:	McGuire, Mcguire
Issue date:	01/19/1990
From:	; DUKE POWER CO.
To:	;
Shared Package
ML19354D922	List: ML19354D921; ML19354D923;
References
	NUDOCS 9001250010
	Download: ML19354D923 (5)
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iU.S. Nuclocr Rigu ctcry Comicsion -

1 ATTNr Document C ntr$1 Dask !

Janusry 19, 1990

. 4ttaciument No. 2 PLANT SYSTEMS l

3/4.7.6 CONTROL AREA VENTILATION SYSTEM LIMITING CONDITION FOR OPERATION l

3.7.6. Two independent Control Area Ventilation Systems shall be OPERABLE..

APPLICABILITY:

ALL MODES ACTION:

(Units 1 and 2)

MODES 1, 2, 3 and 4:

'With one Control.' Area Ventilation jystem inoperable, restore the inoperable system to OPERABLE status within 7A days or be in at least. HOT STANDBY within

(:

the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

p4IN MODES 5 and 6:

a.

With one Control Area Ventilation System inop3rable, restore the inoperable system to OPERABLE status within 7Adays or initiate and g

maintain operation of the remaining OPERABLE Control Area Ventilation System in the recirculation mode;.and b.

With both= Control A_rea Ventilation Systems inoperable, or with the OPERABLE Control Area Ventilation System, required to be in the recirculation mode by ACTION a., not capable of being powered by an OPERABLE emergency power source, suspend all operations involving CORE ALTERATIONS or positive reactivity changes, c.

The provisions of Specification 3.0.4'are not applicable.

SURVEILLANCE RE0VIREMENTS 4.7.6 Each Control Area Ventilation System shall be demonstrated OPERABLE:

a.

At least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , by verifying that the control room air temperature is less than or equal to MC*F; 40 b.

At least once per 31' days on a STAGGERED TEST BASIS, by-initiating, from the control room, flow through the HEPA filters and charcoal adsorbers and verifying that the system operates.for at,least 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months with the heaters operating; L

ime ex ension o 1 days is granted for each tra'

[

a time, to allow sys em mo t

e two 50%

6 capacity outside air filter fan ca system i

modification wo cGuire units is to be in a refueling o d

nre nf +nvir nac rnntainore e4+e

t :::;7 nm M'

McGUIRE - UNITS 1 and 2 3/4 7-13 Amendment No.I ((Unit t l Amendment No Unit %)1

U.S. E cr R;gulctcry ' Comme os' ion 1

Document Contral pa::k p

'J::n: cry 19..1990

.. Attachment No. 2

~

i PLANT SYSTEMS-SURVEILLANCE REQUIREMENTS (Continued)-

7 c.

At least once per 18 months, or (1)'after any structural maintenance on the HEPA filter or charcoal adsorber housings, ev d).following painting, fire or chemical release'in any ventilation zone _

communicating with the system, by:

1)

Verifying that the system' satisfies the in-place penetration and bypass leakage. testing acceptance criteria of less than 1%

and uses-the' test procedure guidance of Regulatory Positions L

C.5.a. C.5.c, and C.5.d of Regulatory Guide 1.52, Revision 2, i

March 1978, and the system flow rate is 2000 cfm

.10%;

2)

Verifying,'within 31 days after removal : that a laboratory-analysis of a representative carbon-sample obtained.in'

~

accordance with Regulatory Position C.6.b of. Regulatory Gu_ide-1.52, Revision 2, March 1978,' meets the laboratory _ testing criteria of Regulatory Pos'ition C 6.a of Regulatory Guide 1.52, Revision 2, March 1978.for'a methyl iodide penetration of less than Js; and 0./Tf yp 3)

' Verifying a system flow rate of 2000 cfm + 10% during system operation when tested in accordance with INSI N510-1975.

d.

After every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of charcoal adsorber operation, by verifying within 31-days after removal, that a laboratory analysis.of'a.

1 representative carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 2,. March-1978, meets the laboratory testing criteria of Regulatory Position 'C.6.a

~

t of Regulatory Guide 1.52, Revision 2, March 1978, for a methyl l

iodide penetration of less than )s; d./75 H e.

At least once per 18 months, by:

1)

Verifying that the pressure drop across the combined pre-filters, HEPA filters and charcoal'adsorber banks is less than 5 inches Water Gauge while operating the system at a flow rate of 2000 cfm + 10%;

2)

Verifying that upon actuation of a diesel generator sequencer the system automatically switches into a mode of operation'with flow through the HEPA filters and charcoal adsorber banks; 3)

Verifying that-the system maintains the control room at a-positive pressure of greater than or equal.to 1/8 inch W.G.

relative to the outside atmosphere during system operation; and i

4)

Verifying that the heaters dissipate 10 1 1.0 kW when tested in accordance with ANSI N510-1975.

kW 6.

(us2

-U.S. Mus1Scr Rigulctcry causmiscito i

ATTN:- Documeat-Control Dxk

- i K

Jcnu;ry 19.,1990 -

A. N Nf 5EST!MS SURVEILLANCE REQUIREMENTS'(Continued) r,

e f.

After each complete or partial replacement of a HEPA. filter bank, by verifying that the HEPA filter bank satisfies the in place penetration

[

and bypass leakage testing acceptance criteria of less than 1% in l

accordance with-ANSI N510-1975 for a 00P test aerosol while operating.

l the system at a flow rate'of 2000 cfm r 10%; and i

g.

After each complete or partial replacement-of a charcoal adsorber, bank, by verifying that the charcoal adsorber satisfies the in place l.

penetration and bypass leakage testing acceptance criteria of less-than 1%-in accordance with ANSI N510-1975 for a halogenated hydro-carbon refrigerant test gas while' operating-the system at a flow rate of 2000 cfm + 10%.

i NO CHANGES THIS PAGE.

I EOR INFORMATION ONLY i' '

(

l l

-+

McGUIRE - UNITS'l and 2 3/4 7 <

i

- u+

,.-yre y,

..-,-w<

'U.S. Cuclect. Reg:lctory Comniocion ATDI: Documezt' Control Deak

^

January 19, 1990

~

N3 CHANOES THIS PAGE.

. Attachment N6. 2 POR INFORMATION ONW BASE 5 STANDBY EWCLEAR SERVICE WATER POND (Continued)

The limitations on minimum water level and maximum temperature are based on providing a 30 day cooling water supply to safety-related equipment without exceeding their design basis temperature and is consistent with the recommend-ations of Regulatory Guide 1.27. " Ultimate Heat Sink for Nuclear Plants,"

March 1974.

The Surveillance Requirements specified for the das inspection will conform to the recommendations of Regulatory Guide 1.127. Revision 1 March 1978 3/4.7.6 CONTROL AREA VENTILATION $Y$7EM The OPERASILITY of the Control Area Ventilation System ensures that:

(1) the ambient air temocrature does not exceed the allowable temperature for continuous duty rating for the equipment and instrumentation cooled by this-system, and (2) the control room will remain habitable for operations personnel during and following all credible accident conditions.

Cumulative operation of the system with the heaters on for 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months over a 31-day period is sufficient to reduce the buildup of moisture on the adsorbers and HEPA filters. The OPERA 81LITY of this system in conjunction with control room design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 ren or less whole body, or its equivalent.

This limitation is consistent with the requirements of General Design Criterion 19 of Appendix A,- 10 CFR 50.

ANSI N510-1975 will be used as a procedural guide for surveillance testing.

3/4.7.7 AUXILIARY BUILDING FILTERED VENTILATION EXHAUST SYSTEM The OPERABILITY of the Auxiliary Building Filtered Ventilation Exhaust System ensures that radioactive materials leaking from the ECCS equipment within the auxiliary building following a LOCA are filtered prior to reaching the environment.

The operation of this system and the resultant effect on offsite dosage calculations were assumed in the accident analyses. ANSI N510 1975 will be used as a procedural guide for surveillance testing.

The methyl iodide penetration test criteria for the carbon samples have been made more restrictive than required for the assumed iodine removal in the accident analysis because the humidity may be greater than 70% under normal operating conditions.

i l

J i

t McGUIRE - UNITS 1 and 2 8 3/4 7-4 s

ML19354D923

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