Text

Proposed Tech Specs Section 3/4.7.7 Re Control Room Emergency Ventilation Sys
	ML20095L028
Person / Time
Site:	Farley
Issue date:	12/19/1995
From:	; SOUTHERN NUCLEAR OPERATING CO.
To:	;
Shared Package
ML20095L021	List: ML20095L016; ML20095L028;
References
	NUDOCS 9512290390
	Download: ML20095L028 (28)
	v • d • e

. - - . -. . . - .-

ENCLOSURE 3 s

Joseph M. Farley Nuclear Plant Request to Revise Technical Specifications ;

Control Room Emergency Ventilation System 1

Changed Pages Unit 1 Remove Pane Insert Pane Page 3/4 7-16 Replace Page 3/4 7-17 Replace Page 3/4 7-17a Replace Page 3/4 7-17b Add Page B 3/4 7-4 Replace Page B 3/4 7-4a Add Unit 2 Remove Pane Insert Page Page 3/4 7-16 Replace Page 3/4 7-17 Replace Page 3/4 7-17a Replace Page 3/4 7-17b Add Page B 3/4 7-4 Replace Page B 3/4 7-4a Add E3-1 9512290390 951219 PDR ADOCK 05000348 P PDR

PLANT SYSTEMS 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM CONTROL ROOM EMERGENCY FILTRATION / PRESSURIZATION SYSTEM (CREFS) l LIMITING CONDITION FOR OPERATION I I 3.7.7.1 Two Control Room Emergency Filtration / Pressurization System (CREFS) trains shall be OPERABLE.

APPLICABILITY: ALL MODES, during novement of irradiated fuel assemblies, and during movement of loads over irradiated fuel.

ACTION:

MODES 1, 2, 3 and 4:

With one CREFS train inoperable, restore the inoperable train to OPERABLE status within 7* 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 .

' MODES 5, 6, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel:

a. With one CREFS train inoperable, restore the inoperable system to OPERABLE status within 7 days or immediately place the OPERABLE CREFS train in the emergency recirculation mode or immediately l suspend movement of irradiated fuel assemblies and movement of l loads over irradiated fuel,

b. With both CREFS trains inoperable, immediately suspend movement of i irradiated fuel assemblies and movement of loads over irradiated fuel.

SURVEILLANCE REQUIREMENTS 4.7.7.1 Each CREFS train shall be demonstrated OPERABLE: l

a. At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flow through the pressurization and

! recirculation system HEPA filters and charcoal adsorbers and verifying that the pressurization system has operated for at least 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months with the heater on during the past 31 days.

A one-time extension to 30 days for each train of the recirculation filtration function of CREFS is granted for implementation of control room l cooling design changes.

FARLEY-UNIT 1 3/4 7-16 AMENDMENT NO.

1 PLANT SYSTEMS

, SURVEILLANCE REQUIREMENTS (Continued) l

b. At least once per 18 months or (1) after any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release that could have contaminated the charcoal adsorbers or HEPA filters in any )

ventilation zone ecmmunicating with the system by: j l

l

1. Verifying that the cleanup system satisfies the in-place l testing acceptance criteria of greater than or equal to i 99.5% filter efficiency while operating the system at a flow rate indicated in Note 1 and using the following test procedures-l (a) A visual inspection of the control room emergency air ;

cleanup system shall be made before each DOP test or activated carbon adsorber section leak test in accordance with Section 5 of ANSI N510-1980.

(b) An in-place DOP test for the HEPA filters shall be performed in accordance with Section 10 of ANSI N510-1980.

1 (c) A charcoal adsorber section leak test with a gaseous !

halogenated hydrocarbon refrigerant shall be performed in accordance with Section 12 of ANSI N510-1980.

2. Verifying within 31 days af ter removal that a laboratory analysis of a representative carbon sample obtained in accordance with Section 13 of ANSI N510-1980 meets the )

laboratory testing efficiencies criteria given in Note 2 ;

when tested with methyl iodide at 80'C and 70% relative humidity.

3. Verifying a system flow rate as indicated in Note 1 during system operation when tested in accordance with Section 8 of ANSI N510-1980, i

c. 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 representative carbon sample obtained in ;

accordance with Section 13 of ANSI N510-1980 meets the !

laboratory testing ef ficiencies criteria given in Note 2 when l tested with methyl iodide at 80'C and 70% relative humidity I l

i l

l l

FARLEY-UNIT 1 3/4 7-17 AMENDMENT NO.

PLANTSYSTEh3 SURVEILLANCE REQUIREMENTS (Continued) m I \

d. 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 system at a flow rate indicated in Note 1.

2. Verifying that the filter train starts on a Safety Injection Actuation test signal.#

3. Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/8 inch water gauge relative to the outside atmosphere during system operation.

4. Verifying that the pressurization system heater dissipates 7.5 2 0.8 kw when tested in accordance with Section 14 of ANSI N510-1980,

e. After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99.5% of the DOP when they are tested in-place in accordance with Section 10 of ANSI N510-1980 while operating the system at a flow rate indicated in Note 1.

f. After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99.5% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with Section 12 of ANSI N510-1980 while operating the system at a flow rate indicated in Note 1.

Note 1. a. Control Room Recirculation Filter Unit 2000 cfm i 10%

b. Control Room Filter Unit 1000 cfm i 10%

c. Control Room Pressurization Filter Unit 300 cfm 10%

Note 2. a. Control Room Recirculation Filter Unit 2 99%

b. Control Room Filter Unit 2 99%

c. Control Room Pressurization 2 99.825%

l I

l

Surveillance Requirement 4.7.7.1.d.2 does not apply in MODES 5 and 6. l FARLEY-UNIT 1 3/4 7-17a AMENDMENT NO. l

, . PLANT SYSTEMS

. . . 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM CONTROL ROOM AIR CONDITIONING SYSTEM iCRACS)

LIMITING CONDITION FOR OPERATION

' 3.7.7.2 Two Control Room Air Conditioning System (CRACS) trains shall be OPERABLE.

APPLICABILITY: ALL MODES, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel.

ACTION:

MODES 1, 2, 3 and 4:

With one CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 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 follouing 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

MODES 5, 6, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel:

a. With one CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 days er immediately place the OPERABLE CRACS train in operation or immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel,

b. With two CRACS trains inoperable, immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel.

SURVEILLANCE REQUIREMENTS 4.7.7.2 At least once per 18 months verify that each CRACS train has the capability to remove the assumed heat loads.

1 i

l FARLEY-UNIT 1 3/4 7-17b AMENDMENT NO.

ELANT SYSTEM'S e

BASES-6 I I 144 7.6.1 ULTIMATE HEAT SINK (RIVER)

This specification deleted.

3/4 7.6.2 ULTIMATE HEAT SINK iPOND)

The limitations on the ultimate heat sink level and temperature ensure that sufficient cooling capacity is available to either 1) provide normal cooldown of the facility, or 2) to mitigate the effects of accident conditions within acceptable limits.

e limitations on minimum water level and maximum temperature are based on preaiding a 30 day cooling water supply to safety related equipment without exceeding .oir design basis temperature. The measurement of the ground water neepage a least once per 5 years will provide assurance that the 30 day supply of water is available.

3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM The control room emergency filtration / pressurization system (CREFS) consists of two independent, redundant trains that recirculate and filter the control room air, and two independent, redundant trains that pressurize the control room. The OPERABILITY of th.s system in conjunction with control room design provisiens 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", 10CFR50.

When one CREFS train is inoperable, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CREFS train is adequate to perform the control room protection function.

However, the overall reliability is reduced because a single failure in the OPERABLE CREFS train could result in loss of CREFS function. The 7 day Completion Time is based on the low probability of a DBA occurring during this period of time period, and ability of the remaining train to provide the required capability.

Cumulative operation of the system with the heaters on for at least 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 filter.

The control room air conditioning system (CRACS) consists of two independent, redundant trains that provide cooling of recirculated control room air. Each control room air conditioning (CRAC) train is inoperable if it )

is not capable of removing the required heat load for plant conditions. The ~

actual heat load and the heat removal capability needed to adequately cool the .

control room is dependent upon factors such as outdoor air temperature. l FARLEY-UNIT 1 B 3/4 7-4 AMENDMENT NO.

j

PLANT SYSTEMS BASES 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM fcontinued)

With one CRAC train inoperable, the inoperable train .rcast be returned to OPERABLE status within 30 days. This Allowed Outage Time is based on the low probability of complete loss of control room cooling due to the redundancy of the support systems, the capability of the OPERABLE train to provide the required cooling, the potential that plant staff actions can restore or mitigate the effects of component failures, and the time available to respond as loss of control room cooling does not have an immediate, irreversible impact.

While in MODES 5 and 6 during movement of irradiated fuel assemblies or movement of loads over irradiated fuel, if both trains of CRAC cannot be restored to OPERABLE status within 30 days, an OPERABLE CRAC train must be placed in operation immediately; otherwise, immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel.

The OPERABILITY of the control room emergency ventilation system ensures that I

1) the ambient air temperature 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.

3/4.7.8 ECCS PUMP ROOM EXHAUST AIR FILTRATION SYSTEM (PENETRATION ROOM AIR FILTRATION SYSTEM)

The OPERABILITY. of the penetration room air filtration system ensures 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 was assumed in the accident analyses.

Cumulative operation of the system with the heaters on for at least 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 filter.

)

i l

I 1

FARLEY-UNIT 1 B 3/4 7-4a AMENDMENT NO. l 1

- . -. - . . - - =- .

. PLANT SYSTEMS 4

.- 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM l' CONTROL ROOM EMERGENCY FILTRATION / PRESSURIZATION SYSTEM (CREFS) l LIMITING CONDITION FOR OPERATION 3.7.7.1 Two Control Room Emergency Filtration / Pressurization System (CREFS) trains shall be OPERABLE.

APPLICABILITY: ALL MODES, during movement of irradiated fuel assemblies and during and during movement of loads over irradiated fuel.

ACTION:

MODES 1, 2, 3 and 4:

d With one CREFS train inoperable, restere the inoperable train to OPERABLE status within 7* 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 .

MODES 5, 6, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel:

a. With one CREFS train inoperable, restore the inoperable system to

} OPERABLE status within 7 days or immediately place the OPERABLE CREFS train in the emergency recirculation mode or immediately

, suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel.

I

b. With both CREFS trains inoperable, immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated l fuel.

SURVEILLANCE REQUIREMENTS I l l

4.7.7.1 Each CREFS train shall be demonstrated OPERABLE: l

a. At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flow through the pressurization and recirculation system HEPA filters and charcoal adsorbers and verifying that the pressurization system has operated for at least 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months with the heater on during the past 31 days.

1

A one-time extension to 30 days for each train of the recirculation I

, filtration function of CREFS is granted for the purpose of implementation of l control room cooling design changes.

FARLEY-UNIT 2 3/4 7-16 AMENDMENT NO. l

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

I II I

b. . At least once per 18 months or (1) after any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release that could have contaminated the charcoal adsorbers or HEPA filters in any i ventilation zone communicating with the system by:

1. Verifying that the cleanup system satisfies tha in-place testing acceptance criteria of greater than or equal to i 99.5% filter efficiency while operating the system at a flow rate indicated in Note 1 and using the following test procedures:

(a) A visual inspection of the control room emergency air cleanup system shall be made before each DOP test or activated carbon adsorber section leak test in accordance with Section 5 of ANSI N510-1980.

(b) An in-place DOP test for the HEPA filters shall be performed in accordance with Section 10 of ANSI N510-j 1980.

(c) A charcoal adsorber section leak test with a gaseous halogenated hydrocarbon refrigerant shall be performed in accordance with Section 12 of ANSI N510-1980.

2. Verifying within 31 days after removal that a laboratory analysis of a representative carbon sample obtained in accordance with Section 13 of ANSI N510-1980 meets the laboratory testing efficiencies criteria given in Note 2

' when tested with methyl iodide at 80*C and 70% relative humidity.

3. Verifying a system flow rate as indicated in Note 1 during system operation when tested in accordance with Section 8 of

. ANSI N510-1980.

[ c. 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 af ter removal that a laboratory analysis of a representative carbon sample obtained in accordance with Section 13 of ANSI N510-1960 meets the laboratory testing ef ficiencies criteria given in Note 2 when tested with methyl iodide at 80'C and 70% relative humidity.

4 FARLEY-UNIT 2 3/4 7-17 AMENDMENT NO.

4

. . - . - . . . - . ._ _ . - . . .~

(

PLANT SYSTEMS

'- SURVEILLANCE REQUIREMENTS (Continued)

. i i 4

d. 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 system at a flow rate indicated in Note 1.

2. Verifying that the filter train starts on a Safety Injection Actuation test signal.#

3. Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/8 inch water gauge relative to the outside atmosphere during system operation.

4. Verifying that the pressurization system heater dissipates 7.5 1 0.8 kw when tested in accordance with Section 14 of ANSI N510-1980.

e. After each complete or partial replecement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or

, equal to 99.5% of the DOP when they are tested in-place in

) accordance with Section 10 of ANSI N510-1980 while operating the 1 j system at a flow rate indicated in Note 1. I

f. After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than

).. or equal to 99.5% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with Section 12 of ANSI N510-1980 while operating the system at a flow rate indicated in Note 1.

i

Note 1. a. Control Room Recirculation Filter Unit 2000 cfm ! 10%

b.

Control Room Filter Unit 1000 cfm : 10% l l

c. Control Room Pressurization Filter Unit 300 cfm : 10%

Note 2. a. Control Room Recirculation Filter Unit 2 99%

b. Control Room Filter Unit 2 99%

c. Control Room Pressurization 2 99.825%

3

Surveillance Requirement 4.7.7.1.d.2 does not apply in MODES 5 and 6. l FARLEY-UNIT 2 3/4 7-17a AMENDMENT NO. l

PLANT'SVSTE$S 3/4.7.7 CONTROL ROCM EMERGENCY VENTILATION SYSTEM

=

CONTROL ROOM AIR CONDITIONING SYSTEM (CRACS)

LIMITING CONDITION FOR OPERATION I I I I 3.7.7.2 Two Control Room Air Conditioning System (CRACS) trains shall be OPERABLE.

APPLICABILITY,2 ALL MODES, during movement of irradiated fuel' assemblies, and during movement of loads over irradiated fuel.

ACTION:

MODES 1, 2, 3 and 4:

With one CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 days or be in at least HOT STANDBY within the j next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN L lin the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

MODES S, 6, during movement of irradiated ft.el assemblies, and during movement of loads over irradiated fuel:

a. With one CRACS train inoperable, I vtore the inoperable system to OPERABLE status within 30 days or i. mediately place the OPERABLE CRACS train in operation or immediat. ;y suspend movement of irradiated fuel assemblies and moveme.'t of loads over irradiated fuel,

b. With two CRACS trains inoperable, immedia' ely suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel.

SURVEILLANCE REQUIREMENTS 4.7.7.2 At least once per 18 months verify that each CRACS train has the I

capabil'.ty to remove the assumed heat loads.

4 l

l I

1 FARLEY-UNIT 2 3/4 7-17b AMENDMENT NO. i

PLANT SYSTEMS BASES 3/4 7.6.1 ULTIMATE HEAT SINK (RIVER)

This specification deleted.

3/4 7.6.2 ULTIMATE HEAT SINK (POND)

The limitations on the ultimate heat sink level and temperature ensure that sufficient cooling capacity is available to either 1) provide normal cooldown of the facility, or 2) to mitigate the effects of accident conditions within acceptable limits.

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. The measurement of the ground water seepage at least once per 5 years will provide assurance that the 30 day supply of water is available.

3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM The control room emergency filtration / pressurization system (CREFS) consists of two independent, redundant trains that recirculate and filter the l control room air, and two independent, redundant trains that pressurize the control room. 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 rem or less whole body, or its equivalent.

This limitation is consistent with the requirements of General Design Criteria 19 of Appendix "A', 10CFR50.

)

When one CREFS train is inoperable, action must be taken to restore OPERABLE ' status within 7 days. In this Condition, the remaining OPERABLE CREFS train is adequate to perform the control room protection function.

However, the overall reliability is reduced because a single failure in the OPERABLE CREFS train could result in loss of CREFS function. The 7 day Completion Time is based on the low probability of a DBA occurring during this period of time period, and ability of the remaining train to provide the required capability.

Cumulative operation of the system with the heaters on for at least 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 filter. l The control room air conditioning system (CRACS) consists of two l independent, redundant trains that provide cooling of recirculated control room air. Each control room air conditioning (CRAC) train is inoperable it it !

is not cipable of removing the required heat load for plant conditions. The actual heat load and the heat removal capability needed to adequately cool the i control room is dependent upon factors such as outdoor air temperature.

FARLEY-UNIT 2 B 3/4 7-4 AMENDMENT NO.

' FLANT SYSTfjiS BASES 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM (continued)

With one CRAC train inoperable, the inoperable train must be returned to OPERABLE status within 30 days. This Allowed Cutage Time is based on the low probability of complete loss of control room ecoling due to the redundancy of the support systems, the capability of the OPERABLE train to provide the required cooling, the potential that plant staff actions can restore or mitigate the effects of component f ailures, and the time available to respond as loss of control room cooling does not have an immediate, irreversible impact.

While in MODES S and 6 during movement of irradiated fuel assemblies or movement of loads over irradiated fuel, if both trains of CRAC cannot be restored to OPERABLE status within 30 days, an OPERABLE CRAC train must be ,

placed in operation inanediately; otherwise, immediately suspend movement of l irradiated fuel assemblies and movement of loads over irradiated fuel. i l

l The OPERABILITY of the control room emergency ventilation system ensures that

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

3/4.7.8 ECCS PUMP ROOM EXHAUST AIR FILTRATION SYSTEM (PENETRATION ROOM AIR FILTRATION SYSTEM)

The OPERABILITY of the penetration room air filtration system ensures 1 i

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 was assumed in the accident analyses.

Cumulative operation of the system with the heaters on for at least 10 l hours over a 31 day period is sufficient to reduce the buildup of moisture on i the adsorbers and HEPA filter.

l l

l 1

FARLEY-UNIT 2 B 3/4 7-4a AMENDMENT NO. l

ENCLOSURE 4

. Joseph M. Farley Nuclear Plant Request to Revise Technical Specifications Control Room Emergency Ventilation System Marked Pages .

1 l

I i

E4-1

PLANT SYSTEMS 3/4.7.7 CONTR0t. R00M EMERGENCY VENTILATION SYSTEM bW IMITING CONDITION FOR OPERATION

3. Two independent sontrol room emergency air cleanup systems be OPER E.

.1

] APPLICABIL : ALL MODES.

! ACTION: ,

l MODES 1, 2, 3 and 4:

)

With one control room emergenc ir clean system inoperable, restore the l inoperable system to OPERABLE sta w n 7 days or be in at least HOT STAND 8Y

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

j MODES 5 and 6 (during irradiate uel move t, or movement of loads over i irradiated fuel):

a. With one contro oom emergency air cleanu stem inoperable, restore i the inoperab system to OPERA 8LE status wit 7 days or initine and l 1 maintain o ation of the control room emergenc, ventilation system in l

the reci lation mode. l j -

I

b. Wit oth control room emergency air cleanup systems rable, i

! s end all operations involving the movement of irradia fuel or

! vement of loads over irradiated fuel.

. The provisions of Specification 3.0.3 are not applicable in M0 6.

VEILLANCE REQUIREMENTS 4%T.8

.J#7* Each control room emergency ventilation system shall be demonstrated

! OPERABLE:

e. At icest en;e gr 12 hevc; t, ,erif fic,9 thet the e;ntre! rec- W tews. sui s ia lei; the.. vi cyei 1.o A G^i.

A / At least once per 31 days on a STAGGERED TEST BASIS by initiating, fron the control room, flow through the pressurization and recirculation system HEPA filters and charcoal adsorbers and verifying that the pressurization system has operated for at least 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months with the

< heater on during the past 31 days.

b pl At least once per 18 months or (1) after any structural maintenance on

the HEPA filter or charcoal adsorber housings, or (2) folicwing painting, fire or chemical' release that could have contaminated the charcoal adsorbers or HEPA filters in any ventilation zone communicating with the system by:

FARLEY-UNIT 1 3/4 7-16 AMENDMENT NO. N o 70 t

. - . .. ._ . . _ . . _ ~

IP(SIElt1r JL l PLANT SYSTEMS 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM CONTROL ROOM EMERGENCY FILTRATICM PRESSURI2ATICN SYSTEM (CREFS)

LIMITING CONDITION FOR OPERATION

.i I I 11 I I 5 3.7.7.1 Two Control Room Emergency Filtration / Pressurization System (CREFS) trains shall be OPERABLE. l l

APPLICABILITY: ALL MODES, during movement of irradiated fuel assemblies, i and during movement of loads over irradiated fuel.

ACTION: .)

MODES 1, 2, 3 and 4: l 1

With one CREFS train inoperable, restore the inoperable train to OPERABLE status within 7* 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 . l MODES 5, 6, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel: j

a. With one CREFS train inoperable, restore the inoperable system to OPERABLE status within 7 days or immediately place the OPERABLE CREFS train in the emergency recirculation mode or immediately suspend movement of irradiated fuel assemblies and movement of l

loads over irradiated fuel.

b. With both CREFS trains inoperable, inmediately suspend movement of irradiated fuel assa.-blies and movement of loads over irradiated fuel.

A one-time extension to 30 days for each train of the recirculation filtration function of CREFS is granted for implementation of control room cooling design changes.

f 1

- . . . - = . - - . .. . . - - . . - . - _ _ . - _ _ . - - . . - -- _ - --

l PLANT SYSTEMS 1

SURVEILLANCE REQUIREMENTS (Continued) l i 1. Verifying that the cleanup system satisfies the in-place testing acceptance criteria of greater than or equal to

, 99.5% filter efficiency while operating the system at a i

flow rate indicated in Note 1 and using the following test l procedures:

(a) A visual inspection of the control room emergency air cleanup system shall be made before each DOP test or activated carbon adsorber section leak test in accordance with Section 5 of ANSI N510-1980.

(b) An in-place DOP test for the HEPA filters shall be performed in accordance with Section 10 of ANSI N510-1980.

1 l (c) A charcoal adsorber section leak test with a gaseous i halogenated hydrocarbon refrigerant shall be performed j in accordance with Section 12 of ANSI N510-1980.

2. Verifying witht'n 31 days after removal that a laboratory

, analysis of a representative carbon sample obtained in J

accordance with Section 13 of ANSI NS10-1980 meets the laboratory testing efficiencies criteria given in Note 2

when tested with methyl todide at 80'C and 705 relative

! humidity, i 3. Verifying a system flow rate as indicated in Note 1 durtag I

system operation when tested in accordance with Section 8 . l

! . of ANS! N510-1980. l i

L C, / After every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of charcoal adsorber operation by 1

, verifying within 31 days after removal that a laboratory '

analysis of a representative carbon sample obtained in accordance with. Section 13 of ANS! N510-1980 meets the

! laboratory testing efficiencies criteria given in Note 2 when j tested with methyl iodide at 80*C and 705 relative humidity.

d /. At least once per 18 months by: 1

! 1. Verifying that the pressure drop across the combined HEPA '

! filters and charcoal adsorber banks is less than 6 inches Water 9auge while operating the system at a flow rate 1 indicated in Note 1.

2. Verifying that the filter train starts on a Safety Injection Actuation test signal.f i f Surveillance Requirement ^_'_'r

does not apply in MODES S and 6.

4.i'9* h .

FARLEY-UNIT 1 3/4 7-17 AMEN 0 MENT NC. 46 l

l 4

?

4 thw=4- . _-.

PL NT SYSTEMS SURVE!LLANCE REQUIREMENTS (Continued)

3. Verifying that the system maintains the control room at a positive pressure of greater than or equal to 1/8 inch water gauge relative to the outside atmosphere during system operation.

4 Verifying that the pressurization system heater dissipates 7.5 + l 0.8 kw when tested in accordance with Section 14 of ANSI M510-1780.

g, /. After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99.5% of the DOP when they are tested in-place in accordance with Section 10 of ANSI N510-1980 while operating the system at a flow rate indicated in Note 1.

fg.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99.5% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with Section 12 of ANSI N510-1980 while operating the system at a flow rate indicated in Note 1.

Note 1. a. Control Room Recirculation Filter Unit 2000 cfm + 101

b. Control Room Filter Unit 1000 cfm T 105

c. Control Room Pressurization Filter Unit 300cfm{los Not e 2. 4. Control Room Recirculation Filter Unit > 991

b. Control Room Filter Unit Y 995

c. Control Room Pressurization E99.8251 l

i L ltJSed b -

1 E

/

i FARLEY-UNIT 1 3/4 7-17a MENOMENT NO. 4, 70 I

! I i

l

INSERT B PLANT j;VSTEMS 314.7 7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM CONTROL ROOM AIR CONDITIONING SYSTEM (CRACS)

LIMITING CONDITION FOR OPERATION 3.7.7.2 Two Control Room Air Conditioning System (CRACS) trains shall

'be OPERABLE.

APPLICABILITY: ALL MODES, during movement of irradiated fuel assemblies, and during movement of loads over irradicted fuel.

ACTIONt MODES 1, 2, 3 and 4:

With one CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 days or be in at least HCfr STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD Sh";TDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

MODES 5, 6 during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel:

a. With one CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 days or immediately place the OPERABLE CRACS train in operation or immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel,

b. With two CRACS trains inoperable, immediately suspend movement of j irradiated fuel assemblies and movement of loads over irradiated fuel.

SURVEILLANCE REQUIREMENTS 4.7.7.2 At least once per 18 months verify that each CRACS train has the capability to remove the assumed heat loads.

PLANT SYSTEMS _

a BASES

3/4 7.6.1 I!LTIMATE HEAT SINK (RIVER)

This specification deleted.

l l 3/4 7.6.2 ULTIMATE HEAT SINK (PONO) i The limitations on the ultimate heat sink level and temperature ensure that

, sufficient cooling capacity is available to eithei 1) provide normal cooldown of the facility, or 2) to mitigate the effects of accident conditions within acceptable limits.

I The limitations on minimum water level and maxima temperature are based on providing a 30 day cooling water supply to safety related equipment without j

exceeding their design basis temperature. The measurement of the ground water seepage at least once per 5 years will provide assurance that the 30 day supply

of water is available. __

4 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM gg(

e OPERABILITY of the control room ventilation sysum ensures that 1) e erature does not exceed the allowable temperature fo uous ambient i

duty rating for quipment and in:traentation cooled by and'2)

nel during and the control room wil in habitable for operations 4

following all credible acci conditions. ILITY of this system in conjunction with control room d or ns is based on Ifniting the radiation exposure to personnel the control room to 5 rem or less whole body, or its equival his limi is consistent with the requirements of Gen sign Criteria 19 of Ap fx "A*, 10CFR50.

l Cum e operation of the system with the heaters o at least 10 i

hour er a 31 day period is sufficient to reduce the buildup isture on i

l adsorbers and HEPA filter.

3/4.7.8 ECCS PUMP ROOM EXHAUST AIR FILTRATION SYSTEM (PENETRATION ROOM AIR FILTRATION SYSTEM) l The OPERABILITY of the penetration room air filtration system ensures that I 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 was assumed in the accident analyses.

i 4 Cumulative operation of the system with the heaters on for at least 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 build 0p of moisture on the adsorbers and HEPA filter. .

j 8 3/4 7-4 AMEN 0 MENT NO. 45 FARLEY-UNIT 1 l,

4

-. -. -. . . - _ = _ - . . .

4 INSERT C

l I

1 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM.

The control room emergency filtration / pressurization system (CREFS) l consists of two inderendent, redundant trains that recirculate and filter the l

control room air, and two independent , redundant trains that pressurize the i control room. The OPERABILITY of this system in conjunction with control room i 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*, 10CFR50.

t When one CREFS train is inoperable, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CREFS train is adequate to perform the control room protection function.

However, the overall reliability is reduced becauce a single failure in the OPERABLE CREFS train could result in loss of CREFS function. The 7. day Completion Time is based on the low probability of a DBA occurring during this )

time period, and ability of the remaining train to provide the required capability, i

Cumulative operation of the system with the heaters on for at least 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 filter, j l

3 The control room air conditioning system (CRACS) consists of two !

independent, redundant trains that provide cooling of recirculated control room air. Each control room air conditioning (CRAC) train is inoperable if it is not capable of removing the required heat load for plant conditions. The actual heat load and the heat removal capability needed to adequately cool the l

control room is dependent upon f actors such as outdoor air temperature. j l

With one CRAC train inoperable, the inoperable train must be returned to OPERABLE status within 30 days. This Allowed Outage Time is based on the low probability of complete loss of control roce cooling due to the redundancy of

, the support systems, the capability of the CPERABLE train to provide the required cooling, the potential that plant staff actions can restore or mitigate the effects of component failures, and the time available to respond as loss of control room cooling does not have an immediate, irreversible impact.

While in MODES 5 and 6 during movement of irradiated fuel assemblies or movement of loads over irradiated fuel, if both trains of CRAC cannot be restored to OPERABLE status within 30 days, an OPERABLE CRAC train must be j placed in operation immediately; otherwise, immediately suspend movement of l irradiated fuel assemblics and movement of loads over irradiated fuel. l The OPERABILITY of the control room emergency ventilation system ensures that

1) the ambient air temperature does not exceed the allowable temperature for 1 continuous duty rating for the equipment 'and instrumentation cooled by this !

system and 2) the control room will remain habitable for operations personnel I during and following all credible accident conditions.

I y ., , _ , _ _ , _ , _ _ _ _ _ _ - - _ - - - - _ _ - - - - - - - - - - - - - - - - - -

i '

A PLANT SYSTEMS, 88 J

3 7.7 CONTW0t. ROOM EMERGENCY VENT!LATION SYSTEM LIMI CON 0! TION FOR OPERATION 3.7.7 Two i pendent control room emergency air clean systems shall be OPERABLE.

APPLICAS!L!TY: ALL ES.

ACTION:

MODES 1, 2, 3 and 4:

With one control room energency af anup system inoperable, restore tne 1

inoperable system to OPERABLE s us w in 7 days or be in at least HOT STA!40BY j within tne next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and i OLD SHUTO within the following 3U hours.

! MODES 5 and 6 (during tre ated fuel movement, j reovement of loads over irradiated fuel):

. a. With one trol room emergency air cleanup sy e inoperable, restore the ino able system to OPERA 8LE status within ays or initiate and maint operation of the control room emergency ve 11ation systen in

} the circulation mode.

b. th both control room emergency air cleanup systems inop :le, i

suspend all operations involving the movement of irradiated ei or movement of loads over irradiated fuel.

c. The provisions of Specification 3.0.3 are not applicable in MODE .

URVEILLANCE REQUIREMENTS hi.Tl ch control room emergency ventilation system shall be demonstrated 1

~ y..,.m.. u.____w_ . _ _ c 2: n_ ,y. +.. m+ " - -

....1 .

1 i

i (L Ar". At least once per 31 days on a STAGGERED TEST BASIS by initiating, from j

the control room, flow through the pressurization and recirculation

system HEPA filters and charcoal adsorters and verifying that the pressurization system has operated for at least 10 hours1.157407e-4 days 0.00278 hours 1.653439e-5 weeks 3.805e-6 months witn the j heater on during the past 31 days.

j j

6 /. At least ones per 18 months or (1) after any ptructural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release that could have contaminated the charcoal adsorbers or HEPA filters in any ventilation zone connunicating with tne system by:

FARLEY-UNIT 2 3/4 7-16 AMEtCMENT W. 37, 62 h

J

sm t

INSERT A ELANT SYSTEMS 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM -

[

CONTROL ROOM EMERGENCY FILTRATION / PRESSURIZATION SYSTEM (CREFSL

_ LIMITING CONDITION FOR OPERATION 3.7.7.1 Two Control Room Emergency Filtration / Pressurization System (CREFS) trains shall be OPERABLE.

APPLICABILITY: ALL MODES, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel.

ACTION:

MODES 1, 2, 3 and 4:

With one CREFS train inoperable, restore the inoperable train to OPERABLE status within 7* 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 .

MODES 5, 6, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel: s

a. With one CREFS train inoperable, restore the inoperable system to OPERABLE status within 7 days or immediately place the OPERABLE CREFS train in the emergency recirculation mode or immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated fuel.

b. With both CREFS trains inoperable, immediately suspend movement of

irradiated fuel assemblies and movement of loads over irradiated 1

fuel.

A one-time extension to 30 days for each train of the recirculation filtration function of CREFS is granted for implementation of control room cooling design changes, j

i i

f i

l

'~

) Pt. ANT SYSTEMS

. SURVE!LLAbtt REQUIREMENT 5 (Contine:41

1. Verifying that the cleanup systes satisffes the in-place testing acceptance criteria of greater than or equal to i 19.55 filter efficiency entle operating the system at a i flow rate indicated in Note 1 and using the following test pcocedures:

1 (4) A visual inspection of the control room emergency air i

cleanup system shall be sade before each 00P test or activated cart'on adsorber section leak test in j accordance with Section 5 of ANS! NS10-1980.

f (b) An in-place 00P test for the HEPA filters shall be

! performed in accordance with Section 10 of ANS!

j N510-1980.

! (c) A charcoal adsorber section leak test with a gaseous

halogenated hydrocarbon refrigerant shall be performed

] in accordance with Section 12 of ANS! N510-1980.

2. Verifying within 31 days after removal that a laboratory

- analysis of a representative carbon sample obtained in accordance with Section 13 of ANSI N510-1980 seets the laboratory testing efficiencies criteria given in Note 2

! when tested with methyl iodide at 80*C and 701 relative huaidity.

l 3. Verifying a system flow nte as indicated in Note 1 during j system operation when tested in acc'ordance with Section 8

i. of ANS! M510-1980. ,

! c /. 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 6

analysis of a representative carbon sample obtained in i accordance with Section 13 of ANSI N510-1980 meets the j laboratory testing ef ficiencies criteria given in Note 2 when j tested with methyl iodide at 80*C and 70% relative htsaidity.

l d /. At least once per 18 onths by:

I 1. Verifying that the pressure drop across the combined HEPA 4

filters and charcoal adsorber banks is less than 6 inches Water Gauge while operating the systes at a flow rate Indicated in Note 1.

I

! 2. Yerifying that the filter train starts on a Safety j Injection Actuatton test signal.# ,

Surveillance Requirement dwhMT* does not apply in MODES 5 and 6.

4.1.1.id.'L

{ FAALEY-UNIT 2 3/4 7-17 M O OMENT No.37 I

1 l

.I l

PLANT'$'Y$iEMS SURVE!U ANCE R(QUIREMEMi$ (Continued) ;

l

3. Verifying tnat the system maintains the control room at a positive pressure of greater than or equal to 1/8 inen water gauge relative to the outside atmosphere during system operation, j 4 Verifying that the pressurization system heater dissipates 7.5 +

0.8 kw wnen tested in accordance with Section 14 of AhS! .N5'.0-17do, g, /. After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99.5% of the 00P when they are tested in-place in accordance with Section 10 of ANSI N510-1980 while operating the system at a flow rate indicated in Note 1.

[4. After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal i to 99.5% of a halogenated hydrocaroon refrigerant test gas wnen they ,

are tested in-place in accordance with Section 12 of ANS! N510-1980 l while operating the system at a flow rate indicated in Note 1.

Note 1. a. Control Room Recirculation Filter Unit 2000 cfm + 101 l

b. Control Room Filter Unit 1000 cfm T 10% l

c. Control Roos Pressurization Filter Unit 300cfm310%

l Note 2. a. Control Room Recirculation Filter Unit > 995

b. Control Room Filter Unit Y 991

c. Control Room Pressurization T 99.8255 lDf i

4 i

l l

FARLEY-UNIT 2 3/4 7-17a AMEN 0 MENT NO. 37,62

, 1 1

t INSERT B PLANT SYSTEMS 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM ,

CONTROL ROOM AIR CONDITIONING SYSTEM (CRACS)

LIMITING CONDITION FOR OPERATION 3.7.7.2 Two Control Room Air Conditioning System (CRACS) trains shall be OPERABLE.

APPLICABILITY: ALL MODES, during movement of irradiated fuel assemblies, and during movement of loads over irradiated fuel.

ACTIONr MODES 1, 2, 3 and 4 :

With orie CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 days or be in at least HOT .etANDBY 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 followiag 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

MODES 5, 6 during movement of irradiated fuel assemblies, and during movement ,

of loads over irradiated fuel: l

a. With one CRACS train inoperable, restore the inoperable system to OPERABLE status within 30 days or immediately place the OPERABL1:

CRACS train in operation or immediately suspend movement of irradiated fuel assemblies and movement of loads over irradiated

^

fuel,

b. With two CRACS trains inoperable, immediately suspend movement of l irradiated fuel assemblies and movement of loads over irradiated ,

fuel.

SURVEILLANCE REQUIREMENTS J

4.7.7.2 At least once per 18 months verify that each CRACS train has the capability to remove the assumed heat loads.

y., - . . , .y-. . _ . . y

i

, PLANT SYSTEMS _

$ASES i 3/4 7.6.1 ULTIMATE HEAT S!* (RIVER) ;

1 This specification deleted. l 3/4 7.6.2 ULTIMATE HEAT S!* (POND)

The limitations on the ultimate beat sink level and temperature ensure that sufficient the facility,cooling) or 2 tocapacity mitigateistheavailable effectstoofeither 1) provide accident normal conditions cooldown of within acceptable Ilmits.

The limitations on minimum water level and maxima temperature are based on i providing a 30 day cooling water supply to safety related equipment without '

exceeding their design basis temperature. The measurement of the ground water seepage at least once of water is available.per 5 years will provide assurance that the 30 dal supply

, 3 ,

3/4.7.7 CONTROL, ROOM EMERGENCY VENTILATION SYSTEM l$

OPERASILITY cf the control room ventilation sys .ee ensures the ambient erature does not exceed the allowable temper r continuous duty rating equipment and instruentation cool ~

is system and 2) the control room w ain habitable for opera personnel during and ;

following all credible a t conditions OPERASILITY of this systan in ;

conjunction with control r a sions is based on Itaiting the ,

4 radiation exposure to personn p e control room to S ren or less '

whole body, or its equi . This I fmita consistent with the l requirements of G Design Criteria 19 of Appe **

l 10CFRSO. '

s

} tve operation of the system with the heaters on for a 0 l over a 31 day period is sufficient to reduce the buildup of moisture n the adsorbers and HEPA filter.

)

l 3/4.7.8 ECCS PUMP ROOM EXHAUST AIR FILTRATION SYSTEM (PENETRATION ROOM AIR l F ILIRATION SY5 TEM) ,

4 The OPERA 8tLITY of the penetration room air filtration system ensures that radioactive materials leaking from the ECCS equipment within the pop room following a LOCA are filtered prior to reaching the environment. The operation l of this system and the resultant effect on offsite dosage calculations was

assmed in the accident analysus.

)

Cumulative operation of the system with the heaters on for at least 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 l the adsorbers and HEPA filter. j l FARLEY-UNIT 2 8 3/4 7-4 M4ENDMENT NO. 36 i

l

1 1

l o' IP4SEI11F(:

l l

3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM l I

i The control room emergency filtration / pressurization system (CREFS) l consists of two independent, redundant trains that recirculate and filter the J control room air, and two independent, redundant trains that pressurize the 1 control room. The OPERABILITY of this system in conjunction with control room l design provisions is based on limiting the radiation exposure to personnel j 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", 10CFR50.

When one CREFS train is inoperable, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CREFS train is adequate to perform the control room protection function. l However, the overall reliability is reduced because a single failure in the OPERABLE CREFS train could result in loss of CREFS function. The 7 day Completion Time is based on the low probability of a DBA occurring during this time period, and ability of the remaining train to provide the required capability.

Cumulative operation of the system with the heaters on for at least 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 filter.

The control room air conditioning system (CRACS) consists of two independent, redundant trains that provide cooling of recirculated control room air. Each control room air conditioning (CRAC) train is inoperable if it is not capable of removing the required heat load for plant conditions. The actual heat load and the heat removal capability needed to adequately cool the control room is dependent upon factors such as outdoor air temperature.

With one CRAC train inoperable, the inoperable train must be returned to OPERABLE status within 30 days. This Allowed Outsge Time is based on the low probability of complete loss of control rocm cooling due to the redundancy of the support systems, the capability of the OPERABLE train to provide the required cooling, the potential that plant staff actions can restore or mitigate the effects of component failures, and the time available to respond as loss of control room cooling does not have an immediate, irreversible impact.

While in MODES S and 6 during movement of irradiated fuel assemblies or movement of loads over irradiated fuel, if both trains of CRAC cannot be restored to OPERABLE status within 30 days, an OPERABLE CRAC train must be placed in operation immediately; otherwise, immediately suspend movement of irradiated fuel assemblies and movement of loads cver irradiated fuel.

The OPERABILITY of the control room emergency ventilation system ensures that

1) the ambient air temperature 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.

ML20095L028

Text

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