ML17333A830

Proposed Tech Specs Modifying TS 4.7.5.1.e.2 Which Describes Control Room Ventilation Sys Autostart Functions

ML17333A830
Person / Time
Site:	Cook
Issue date:	03/26/1997
From:	AMERICAN ELECTRIC POWER CO., INC.
To:
Shared Package
ML17333A829	List: ML17333A828 ML17333A830
References
NUDOCS 9704010320
Download: ML17333A830 (12)

Text

>LA.'lT S'ST"-."S SURVEILLANCE REOUIREMEVTS (Continued)

Veri ying within 31 days after removal that a laboratory analysis of a carbon sample obtained from a test canister demonstrates a removal efficiency of > 90".. for radioactive methyl iodide when the sample is tested in accordance with ANSI N510 - 1975 (130'C, 95". R.H.}; or

2. Verifying within 31 days after removal that a 1:boratory analysis of at least two carbon samples demonstrate a removal efficiency of > 90", for radioactive methyl iodide when the samples are tested in accordance with ANSI N510 - 1975 (130'C, 95.". R.H.) and the samples are prepared by either:

a) Emptying one entire bed from a removed adsorbed tray, mixing the adsorbent thoroughly, and obtaining samples at least two inches in diameter and with a length equal to the thickness of the bed, or b) Emptying a longitudinal sample from an adsorber tray, mixing the adsorbent thoroughly, and obtaining samples at least two inc'.es in diameter and with a length equal to the thickness of the bed.

Subsequent to reinstalling the adsorber tray used for obtaining the carbon sample, the system shall be dem-onstrated OPERASLE by also:

a) Verifying that the charcoal adsorbers remove > 99" of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510 - 1975 while operating the ventilation system at a flow rate of'000 cfm + 10"., and b) Verifying that the HEPA filter banks remove > 99%

of the OOP v hen they are tested in-place in accordance with ANSI N510 - 1975 whi le operating the ventilation system at a flow rate of 6000 cfm + 10"..

0. C, COOK-UNIT 1 3/4 7-21 e70eo<0320 e70S26 PDR *DOCK 050003i5 P PDR

PLANT SYSTEMS SURVEILLANCE RE UIREMENTS Continued

e. At least once per 18 months by:

1. Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is less than 6 inches Water Gauge vhile operating the ventilation system at a flov rate of 6000 cfm plus or minus 104. t 2.

3. Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/16 inch W. G.

relative to the outside atmosphere at a system flov rate of 6000 cfm plus or minus 10%.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filtor banks remove greater than or equal to 99% of the DOP vhen they are tested in-place in accordance with ANSI N510-1975 while operating the ventilation system at a flow rate of 6000 cfm plus or minus 1Q%.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 994 of a halogenated hydrocarbon refrigerant test gas vhen they are tested in-place in accordance vith ANSI N510-1975 while operating the ventilation system at a flov rate of 6000 cfm plus or minus 10%.

1, the system

a. Verifying tnat on a Safety Injection Sianal from Unitmode.

automatically operates in the pressurization/cleanup

b. Verifying that on a Safety Injection Signal from Unit 2, the system automatically operates in the pressurization/cleanup mode.

COOK NUCLEAR PLANT - UNIT 1 3/4 7-22 AMENDMENT NO. )g7.,144.,

0 1 I

The Unit l ntrol room emergency vent ation from system operates either Unit 1 or automatically on a Safety InjectionUnit Signal is only available when Unit 2. The automatic start fromis active 2 in modes l through 4 in the Un~t 2 ESP actuation system Unit 2.

PLANT SYSTEMS BASES 3 4.7.5 CONTROL ROOM EMERGENCY VENTILATION SYSTEM The OPERABILITY ITY oof the control room emergency ventilation system ensures that the control room om wwil11 remain habitable for operations personnel during and following all credible accident conditi.ons. The OPERABILITY o f this system in conjunction vith control room design provisions iss baase d on miting the ra at on exposure to personnel occupying the control room too 5 rem or 1 ess li y, s equivalent. This limitation is consistent vt.th the requirements of General Design Criteria 19 of Appendix "A", 10 CFR 50.

The control room ventilation system normally n a ns thee control maintains conero room at tern p eratures p lant.. on Co e

t inued which control room equipment aat whi operation at che Technical is qualified Specificationon o ceo for limit m

the t is lif s

f teh permitted e

since the P ortion of o time ehe temperature is likely to be elevated i.s small in comparison to the qualified life of the equi,pment at the limit.

3 4.7.6 ESF VENTILATION SYSTEM The OPERABILITY of the ESF ventilation system ensures s that a aad equate cooling or equ pmenc and that radioactive materi,als leaking from che CCS equipment within the pump room following a LOCA arc env ronment. The operation of this fil and tered pri.or the resultant co effecc g e syseem i

on offsite dosage calculations vere assum e d n th e acc id cnc analyses.

The 1980 version of ANSI N510 is used as a testing guide. i e. Th's is sean d ard, however, is intended to be rigorously applied only to systems which, unlike the ESF ventilation system, are designed too ANSI N509 stan da rds. For the specific case o t e ai.r-aerosol mixing uniformi.ty test required by ANSI N510 as a prerequisice to in-place leak testing of charcoal and HEPA filters, the air'-aerosol uniform mixin test acc epcance criteria vere not rigorously met.

or thi.s reason, a statistical correction fa"tor vill be applied e ap licable too app ca e surveillance cest resules where required.

3 4.7.? SEALED SOURCE CONTAMINATION The limications on se alcd 1 source removable contamination ensure th t h total bod y n ividual or indiv d organ irradiation does not exceed allowable limits in the event of ingestion or inhalation of the probablee leaks ea ge from th e source a . e m tations on removabla contamination for sources requiring leak testing, including alpha emiceers, is based on 10 CFR 70.39(c) limits for intercsc to this spacifi.cation vhich are exempt from che leakage testing are consistent vith the criteria of 10 CFR Parts 30.11-20 COOK NUCLEAR PLANT - UNIT 1 B 3/4 7-5 AMENDMENT NO. gag,gg5,159

C U Co t ued B~ At least once per 18 months by:

1. Verifying that the pressure drop across the combined HEPA filters and charcoal adsorbez banks is less than 6 inches Water Gauge while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10X.

2.

3. Verifying that the system maintains the control zoom at a positive pressure of greater than or equal to 1/16 inch V. G.

relative to the outside atmosphere at a system flow rate of 6000 cfm plus or minus 10X.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99X of the DOP when they are tested in-place in accordance with ANSI N510-1975 while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10X.

g- Aftez each complete or partial replacement of .a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99X of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510-1975 while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10X.

Verifying that on a Safety Injection Signal from Unit 1, the system automatically operates in the pressurization/cleanup mode.f Verifying that on a Safety Injection Signal from Unit 2, the system automatically operates in the pressurization/cleanup mode.g f The provisions of Technical Specification 4.0.8 are applicable.

COOK NUCLEAR PLANT - UNIT 2 3/4, 7-16a AHENDMENT NO. M, ~, 158

PIANT SYSTEMS BASES 3 4.7.5 CONTROL ROOM EMERGENCY UENTILATION SYSTEM The OPERABILITY of the control room EMERGENCY ventilation system ensures that the control room vill remain habitable for operations personnel during and follouing all credible accident conditiona. The OPERBBELETY cf thia system in conjunction vith control room design provisi~ns is based on limiting t e radiation exposure to personnel occupying the control room to 5 rem or less vhole body, or its equivalent. This limitation is consi.stent vith the requirements of General Design Criteri,a 19 of Appendix "A", 10 CFR 50.

The P-~~m) control rooh ventilation system no mally maintains the control room at temperatures at vhi.ch control room equipment is qualified for the life of the p ant. Continued operation at the Technical Specification limit is permitted since the portion of time the temperature is likely to be elevated i.s small in comparison to the qualified life of the equipment at the limit.

The Unit 2 control room emergency ventilation system operates automatically on a Safety Injection Signal from either Unit 1 or Unit 2. The automatic start from Unit 1 is only available when the Unit 1 ESP actuation system is active in modes 1 through 4 in Unit 1.

COOK NUCLEAR PLANT - UNIT 2 B 3/4 7-4a AMENOMENT NO l43

ATTACHMENT 3 TO AEP:NRC: 0398AS PROPOSED REVISED TECHNICAL SPECIFICATION PAGES

3/4 LIMITINGCONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS

.3/4.7 'LANTSYSTEMS SURVEILLANCE RE UIREMENTS Continued At least once per 18 months by:

1. Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is less than 6 inches Water Gauge while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10%.

2. a. Verifying that on a Safety Injection Signal from Unit 1, the system automatically operates in the pressurization/cleanup mode.

b. Verifying that on a Safety Injection Signal from Unit 2, the system automatically operates in the pressurization/cleanup mode.

Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/16 inch W. G. relative to the outside atmosphere at a system flow rate of 6000 cfm plus or minus 10%.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99% of the DOP when they are tested in-place in accordance with ANSI $ 510-1975 while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10%.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater th:a or equal to 99% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510-1975 while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10%.

COOK NUCLEAR PLANT-UNIT I Page 3/4 7-22 AMENDMENT407, 444,

3/4 BASES 3/4.7 ~

PLANT SYSTEMS 3/4.7.5 CONTROL ROOM EMERGENCY VENTILATIONSYSTEM The OPERABILITY of the control room emergency ventilation system ensures that the control room will remain habitable for operations personnel during and following all credible accident conditions. The OPERABILITYof this system in conjunction with control room design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 rem or less whole body, or its equivalent. This limitation is consistent with the requirements of General Design Criteria 19 of Appendix "A", 10 CFR 50.

The Unit 1 control room emergency ventilation system operates automatically on a Safety Injection Signal from either Unit 1 or Unit 2. The automatic start from Unit 2 is only available when the Unit 2 ESF actuation system is active in modes I through 4 in Unit 2.

The control room ventilation system normally maintains the control room at temperatures at which control room equipment is qualified for the life of the plant. Continued operation at the Technical Specification limit is permitted since the portion of time the temperature is likely to be elevated is small in comparison to the qualified life of the equipment at the limit.

3/4.7.6 ESF VENTILATIONSYSTEM The OPERABILITYof the ESF ventilation system ensures that adequate cooling is provided for ECCS equipment and that radioactive materials leaking from the. ECCS equipment within the pump room 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.

The 1980 version of ANSI N510 is used as a testing guide. This standard, however, is intended to be rigorously applied only to systems which, unlike the ESF ventilation system, are designed to ANSI N509 standards. For the specific case of the air-aerosol mixing uniformity test required by ANSI N510 as a prerequisite to in-place leak testing of charcoal and HEPA filters, the air-aerosol uniform mixing test acceptance criteria were not rigorously met. For this reason, a statistical correction factor will be applied to applicable surveillance test results where required 3/4.7.7 SEALED SOURCE CONTAMINATION The limitations on sealed source removable contamination ensure that the total body or individual organ irradiation does not excccd allowable limits in the event of ingestion or inhalation of the probable leakage from thc source material. The limitations on removable contamination for sources requiring leak testing, including alpha emitters, are based on 10 CFR 70.39(c) limits for plutonium. Quantities of interest to this specification which are exempt from the leakage testing are consistent with the criteria of 10 CFR Parts 30.11-20 COOK NUCLEAR PLANT-UNIT I Page B 3/4 7-5 AMENDMENT446, 424, 4$ 9,

3/4 LIMITINGCONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS 3/4.7 'LANTSYSTEMS SURVEILLANCE RE UIREMENTS Continued At least once per 18 months by:

1. Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is less than 6 inches Water Gauge while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10%.

2. a. Verifying that on a Safety Injection Signal from Unit 1, the system automatically operates in the pressurization/cleanup mode.t

b. Verifying that on a Safety Injection Signal from Unit 2, the system automatically operates in the pressurization/cleanup mode.t Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/16 inch W. G. relative to the outside atmosphere at a system flow rate of 6000 cfm plus or minus 10%.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99% of the DOP when they are tested in-place in accordance with ANSI N510-1975 while operating the ventilation system at a flow rate of 6000 cfm plus or minus 10%.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510-1975 while operating the ventilation, system at a flow rate of 6000 cfm plus or minus 10%.

tThe provisions of Technical Specification 4.0.8 are applicable.

COOK NUCLEAR PLANT-UNIT2 Page 3/4 7-16a AMENDMENTK, ~, 4$ 8,

3/4 BASES 3/4.7 ~

PLANT SYSTEMS 3/4.7.5 CONTROL ROOM EMERGENCY VENTILATIONSYSTEM The OPERABILITY of the control room EMERGENCY ventilation system ensures that the control room will remain habitable for operations personnel during and following all credible accident conditions. The OPERABILITY 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 rcm or less whole body, or its equivalent. This limitation is consistent with the requirements of General Design Criteria 19 of Appendix "A", 10 CFR 50.

The Unit 2 control room emergency ventilation system operates automatically on a Safety Injection Signal from either Unit 1 or Unit 2. The automatic start from Unit 1 is only available when the Unit 1 ESF actuation system is active in modes 1 through 4 in Unit 1.

The control room ventilation system normally maintains the control room at temperatures at which control room cquipmcnt is qualified for the life of the plant. Continued operation at the Technical Specification limit is permitted since the portion of time the temperature is likely to be elevated is small in comparison to the qualified life of the equipment at the limit.

COOK NUCLEAR PLANT-UNIT2 Page B 3/4 7Aa AMENDMENT443,

~4 gl