Text

Amends 88 & 77 to Licenses DPR-77 & DPR-79,respectively, Changing Tech Specs to Decrease Max Allowable Pressure Drop Across HEPA & Charcoal Filters in Emergency Gas Treatment, Auxiliary Bldg Gas Treatment & Ventilation Sys
	ML20204H486
Person / Time
Site:	Sequoyah
Issue date:	10/14/1988
From:	Black S; NRC OFFICE OF SPECIAL PROJECTS
To:	;
Shared Package
ML20204H491	List: ML20204H486;
References
	NUDOCS 8810240416
	Download: ML20204H486 (18)
	v • d • e

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UNITED STATES 0'

NUCLEAR REGULATORY COMMISSION

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TENNESSEE VALLEY AUTHORITY DOCKET NO. 50-327 SEQUOYAH NUCLEAR PLANT, UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 88 License No. DPR-77 I

1.

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

L A.

The application for amendment by Tennessee Valley Authority (the licensee) dated April 17, 1987, as supplemented by letter dated July 15, 1988, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),

and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Comission; C.

There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Comission's regulations; D.

The issuance of this amendnent will not be inimical to the common 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.

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Accordingly, the license is amended by changes to the Technical 2.

Specifications as indicated in the attachment to this license amendment and paragraph 2.C.(2) of Facility Operating License No. OPR-77 is hereby amended to read as follows:

(2) Technical Specifications The Technical Specifications contained in Appendices A and B, as revised throuch Amendment flo. 88, are hereby incorporated in the license.

The licensee shall operate the facility in accordance with the Technical Specifications.

This license amendment is effective as of its date of issuance.

3.

FOR THE NUCLEAR REGULATORY COMMISSICN t

Suzanne lack. Assistant Director i

for Pro,iects TVA Projects Division Office of Special Projects

Attachment:

Changes to the Technical Specifications Date of Issuance: October 14, 1988 e

4 h

4 ATTACPPENT TO L!COISE AMENDMENT NO. 88 FACILITY OPERATING LICENSE NO. DPR-77 DOCKET NO. 50-327 4

s Revise the Appendix A Technical Specifications by removing the pages identified below and insertine the enclosed pages. The revised pages are identified by the captioned amendment number and contain marginal lines indicating the area of change. Asterisked pages* are provided to maintain document completeness.

REMOVE INSERT 3/4 6-13*

3/4 6-13*

3/4 6-14 3/4 6-14 3/4 7-17*

3/4 7-17*

3/4 7-18 3/4 7-18 f'

3/4 7-20 3/4 7-20 3/4 9-13 3/4 9-13 O

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O CONTAINMENT SYSTEMS EMERGENCI GAS TREATMENT SYSTEM - EGTS -_ CLEANUP SUBSYSTEM LIMITING CONDITION FOR OPERATION 3.6.1.8 Two independent emergency gas treatment system cleanup subsystems (EGTS) snall be OPERABLE.

APPLICABILITY:

MODES 1, 2, 3 and 4.

ACTION:

With one EGTS cleanup subsystem inoperable, restore the inoperable subsystem to OPERABLE status within 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 aad in COLD SHUTOOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SURVEILLANCE REQUIREMENTS l

4.6.1.8 Each EGTS cleanup subsystem shall be demonstrated OPERABLE:

i a.

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 on.

b.

At least once per 18 months or (1) af ter any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chtmical release in any ventilation zone communicating with the system by:

1.

Verifying that the cleanup system satisfies the in place testing acceptance criteria and uses the test procedures of Regulatory Position C.5.a., C.S.c and C.S.d of Regulatory Guide 1.52, Revision 2, March 1978 (except for the provisions of ANSI N510 Sections 8 and 9), and the system flow rate is 4000 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 Guide 1.52, Revision 2, March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 2, March 1978.

3.

Verifying a system flow rate of 4000 cfm + 10% during system operation when tested in accordance with XNSI N510-1975.

SEQUOYAH - UNIT 1 3/4 6-13

CONTAINMENT SYSTEMS SURVEli. LANCE REQUIREMENTS (Continued) 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 representa-tive 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 of Regulatory Guide 1.52, Revision 2, March 1978.

d.

At least once per 18 months by:

1.

Verifying that the pretsure deep ; cross the combined HEPA filters and charcoal adsorber banks is less than 5 inches Water l

Gauge while operating the filter train at a flow rate of 4000 cfm i 10L 2.

Verifying that the filter train starts on a Phase A containment isolation Test Signal, q

3.

Verify the op6 ration of the filter cooling bypass valves, i

4.

Verifying that the heaters dissipate 16 i 1.6 kw when tested in accordance with ANSI N510-1975.

5.

Verifying that each system produces a negative pressure of greater than or equal to 0.5 inches W. G. in the annulus within 1 minute after a start signal, 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 99.95% of the DOP when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 4000 cfm i 10%.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99.95% of a halogenated hydrocarbon refrigerant test gas when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 4000 cfm i 10%.

I SEQUOYAH - UNIT 1 3/4 6-14 Amendment No. 21, 23 o

PLANT SYSTEMS 3/4.7.7 CONTROL ROOM EMERGENCY VENTILATION SYSTEM

' LIMITING CONDITION FOR OPERATION 3.7.7 Two independent control room emergency ventilation systems shall be OPERABLE.

APPLICABILITY:

ALL MODES ACTION:

MODES 1, 2, 3 and 4 With one control room emergency ventilation system inoperable, restore the inoperable system to OPERABLE status within 7 days or be in at least HOT STAN0BY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUT 00WN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

1 MODES 5 and 6 a.

With one control room emergency ventilation system inoperable, restore the inoperable system to OPERABLE status within 7 days or initiate and maintain operation of the control room ecsrgency ventilation system in the recirculation mode, b.

With both control room emergency air ventilation systems inoperable, suspend all operations involving CORE ALTERATIONS or positive reactivity changes.

c.

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

SURVEILLANCE REQUIREMENTS 4.7.7 Each control room emergency 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 104'F.

b.

At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flow through the HEPA filters and chtrcoal adsorbers and verifying that the system operates for at least 15 minutes.

i c.

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 in any ventilation zone communicating with the system by:

SEQUOYAH - UNIT 1 3/4 7-17 Amendment No. 12

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 1.

Verifying that the cleanup system satisfies the in-ulace testing acceptance criteria and uses the test procedures of Regulatory Positions C.S.a, C.S.c and C.5.d of Regulatory Guide 1.52, Revision 2, March 1978 (except for the provisions of ANSI N510 Sections 8 and 9), anJ the system flow rate is 4000 cfm i 10%.

2.

Verifying within 31 days af ter removal that a laboratory analysis of a representative carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatoiy Guide 1.52, Revision 2, March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 2, March 1978.

3.

Verifying a system flow rate of 4000 cfm i 10% during system cperation when tested in accordance with ANSI 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 af ter removal that a laboratory analysis of represent 1-tive carbon sample obtained in accordance with Regulatory Position Cl6.b of Regulatory Guide 1.52, Revision 2, March 1978, meets the laborato *y testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.32, Revision 2, March 1978.

i 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 3 inches Water Gauge while operating the system at a flow rate of 4000 cfm i 10%.

I 2.

Verifying that on a safety injection signal or a high radiation signal from the air intake stream, the system automatically diverts its inlet 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 Water Gauge relative to the outside atmosphere at a syste,a flow rate of 4000 cfm i 10% (2 3000 cfm recirculation and 5 1000 cfm freih air),

f.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99.95% of the 00P when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 4000 cfm 2 10%.

g.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99.95% of a halogenated hydrocarben refrigerant test gas when they are tested in-place in accordcnce with ANSI N510-1975 while operating the system at a flow rate of 4000 cfm i 10%.

i SEQUOYAH - UNIT 1 3/4 7-18 Amendment No. 12, 68, 33 l

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4 PLANT SYSTEMS

$URVEILLANCE REQUIREMENTS (Continued) 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 repre-sentative 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 Positica C.6.a of Regulatory Guide 1.52, Revision 2, March 1978.

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 3 inches Water Gauge while operating the filter train at a flow rate of 9000 cfm i 10%.

2.

Verifying that the filter trains start on a Containment Phase A Isolation test signal; or a high radiation signal from the fuel pool radiation monitot ing system or the auxiliary building ventilation monitoring system.

3.

Verifying that the system maintains the spent fuel storage area and the ESF pump rooms at a pressure equal to or more negative thar, minus 1/4 inch water gage relative the outside atmosphere while maintaining a vacuum relief flow greater than 2000 cfm and a total system flow of 9000 cfm i 10%.

4.

Verifying that the heaters dispite 32 1 3.2 kw when tested in accordance with ANSI Nd10-1975.

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 99.95% of the DOP when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 9000 cfm i 10%.

f.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99.95% of a halogenated hydrocarDo.: refrigerant test gas when they are tested in place in accordance with ANSI H510-1975 while operating the system at a flow rate of 9000 cfm i 10%.

I i

SEn,UOYAH - UNIT 1 3/4 7-20 Amendment No. 12, 83

REFUELING _0PERAT10?ls SURVEILLANCE REQUIREMENTS (Continued) 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 analysjs of representa-tive carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 2, March 1918, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 2, March 1978.

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 3 inches Water Gauge while operating the filter train at a flow rate of 9000 cfm i 10%.

2.

Verifying that the filter train starts on a Containment Phase A Isolation Test Signal; or a high radiation signal from the fuel pool radiation monitoring system or the auxiliary building ventilation monitoring system.

l 3.

Verifying that the heaters dissipate 32 1 3.2 kw when tested in accordance with ANSI NS10-1975.

e.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater taan or equal to i

99.95% of the 00P when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 9000 cfm

+ 10%.

f.

After each complete or partial replacement of a charcoal adsorber j

bank by verifying that the charcoal adsorbers remove greater than or t

equal to 99.95% of a halogenated hydrocarbon refrigerant test gas i

when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 9000 cfm i 10%.

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SEQUOYAH - UNIT 1 3/4 9-13 Amendment No.SS

pa aug'k UNITEJ STATES E'

NUCLEAR REGULATORY COMMISSION a

D WASHINGTON, D. C. 20066 b,

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TENNESSEE VALLEY AUTHORITY D[tXETNO.50-328 SEQUOYAH NUCLEAR PLANT, UNIT 2 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 77 License No. OPR-79 1.

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

A.

The application for amendment by Tennessee Valley Authority (the licencee) dated April 17, 1987, as supplemented by letter dated July 15, 1988, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),

and the Commission's rules and regulations set forth in 10 CFR Chapter I; 8.

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.

There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.

The issuance of this amendment will not be inimical to the common 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, t

1 1

2 Accordingly, the license is amended by changes to the Technical 2.

Specifications as indicated in the attachment to this license amendment and paragraph 2.C.(2) of Facility Operating License No. OPR-79 is hereby amended to read as follows:

(2) Technical Specifications The Technical Specifications contained in Appendices A and B, as revised through Amendment No. 77. are hereby incorporated in the license.

The licensee shall operate the facility in accordance with the Technical Specifications.

t-3.

This license amendment is effective as of its date of issuance.

FOR THE NUCLEAR REGULATORY COMMISSION Y

?

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SuzannY Black, Assistant Director for Projects TVA Projects Division Office of Special Projects

Attachment:

Changes to the Technical Specifications Date of Issuance: October 14, 1988

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ATTACHMENT TO LICENSE AMENDMENT NO. 77 FACILITY OPERATING LICENSE NO. DPR-79 DOCKET NO. 50-328 Revise the Appendix A Technical Specifications by removing the pages identified below and inserting the enclosed pages. The revised pages are identified by the captioned amendment number and contain narginal lines. indicating the area of change. Asterished pages* are provided to maintain document completeness.

REMOVE INSERT 3/4 6-13*

3/4 6-13*

3/4 6-14 3/4 6-14 7

3/4 7-17*

3/4 7-18 3/4 7-18 1

3/4 7-19*

3/4 7-20 3/4 7-20 3/4 9-15 3/4 9-15 P

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CONTAINMENT SYSTEMS EMEPGENCY GAS TREATMENT SYSTEM - EGTS - CLEANUP SUBSYSTEM LIMITING CONDITION FOR OPERATION 3.6.1.8 Two independent emergency gas treatment system cleanup subsystems (EGTS) shall be OPERABLE.

APPLICABILITY:

MODES 1, 2, 3 and 4.

ACTION:

With one EGTS cleanup subsystem inoperable, restore the inoperable subsystem 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 .

SURVEllLANCE REQUIREMENTS 4,6.1.8 Each EGTS cleanup subsystem shall be demonstrated OPERABLE:

a.

At least once per 31 days on a STAGGEREO TEST BASIS by initiating, i from the control room, flow through the HEPA filters and charcoal adsorbers and verifying that the sys'.em operates for at least 10 heurs with the heaters on, b.

At least once per 18 months or (1) af ter any structural maintenance on the HEPA filter or charcoal adsorber housings, or (2) following painting, fire or chemical release in any ventilation zone communicating with the system by:

1.

Verifying that the cleanup system satisfies the in place test-ing acceptance criteria and uses the test procedures of Regulatory Position C.5.a., C.S.c and C.S.d of Regulatory Guide 1.52, Revision 2, March 1978 (except for the provisions of ANSI N510 Sections 8 and 9), and the system flow rate is 4000 cfm + 10%.

2.

Verifying within 31 days after removal that a laboratory aaaly-sis of a representative carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52. Revi-sion 2, March 1978 meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52. Revision 2, March 1978.

3.

Verifying a system flow rate of 4000 cfm 10% during system operation when tested in accordance with ANSI N510-1975.

SEQUOYAH - UNIT 2 3/4 6-13

?

CONTAINMENT SYSTEMS SURVEILLANCE REQUIREMENTS (Contirued) c.

After overy 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 representa-tive carbon sample obtained in accordance with Regulatory Position C.S.b of Regulatory Guide 1.52. Revision 2. March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52.

Revision 2, March 1978.

d.

At least once per 18 months by:

1.

Verifying that the pressure drop across the combined HEPA ll filters and charcoal adsorber banks is less than 5 inches Water Gauge while operating the filter train at a flow rate of 4000 cfm + 10%.

2.

Verifying that the filter train starts on a Phase A containment isolation Test Signal.

3.

Verify the operation of the filter cooling bypass valves.

4.

Verifying that the heaters dissipate 16 + 1.6 kw when tested in accordance with ANSI N510-1975.

5.

Verifying that each system produces a negative pressure of grt.

than or equal to 0.5 inches W.G. in the annulus within 1 minute after a start signal.

t 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 99.95% of the 00P when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 4000 cfm + 10%.

t 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 99.95% of a halogenated hydrocarbon refrigerant test gas when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 4000 efm + 10%.

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I SEQUOYAH - UNIT 2 3/4 6-14 Amendt.ent No. 11.77

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D PLANf SYSTEMS m

3/4.h.7 CONTR01. ROOM EMERGENCY VENTILATION SYST@

LIMI11NG CONDITION FOR OPERATION 3.7.7 Two indeoendent control room einergency ventilation systems shall be OPERABLE.

APPLICABILITY:

ALL MODES ACTION:

MODES 1, 2, 3 and 4:

With one control room emergency ventilation system inoperable, restore the inoperaole system to OPERABLE status within 7 days or be in at least HOT STANDBY '.11 thin the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTOOWN within the fo' lowing 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

MODES 5 and 6:

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a.

With one control room emergency ventilation system inoperable, restore the inoperable system to OPERABLE status within 7 days or initiate and maintain operation of the control room emergency ventilation system in the recirct.lation mode.

J b.

With both control room emergency air ventilation systemt inoperable, suspend all op:..aations involving CORE ALTERATIONS or positive reactivi'y changes.

c.

The provisions of Specification 3.0.3 are not applicable in M00E 6.

[

SURVEILLANCE REQUIREMENTS i

4.7.7 Each control room emergency venHlation 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 verifyi % that the control room air temperature is less than or equal to 104'F.

i b.

At least once per 31 dayc 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 i

15 minutes.

c.

At least once per 18 months or (1) after any structural maintenance on the HEPA filter or charcoal adsorcer housings, or (2) following t

painting, fire or chemical release in any ventilation zone camunicating with the system by:

Sr M YAH - UNIT 2 3/4 7-17

g 4

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 1.

Verifying that the cleanup system satisfies the in-place testing acceptance criteria and uses the test procedures of Regulatory Positions C.5.a. C.S.c and C.S.d of Regulatory Guide 1.52, Revision 2, March 1978 (except for the provisions of ANSI N510 Sectiens 8 and 9), and the system flow rate is 4000 cfm 1 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 Guide 1.52, Revision 2, March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a of Pegulatory Guide 1.52, Revision 2, March 1978.

3.

Verifying a system flow rate of 4000 cfm + 10% during system cperation when tested in acccrdance with XNSI H510-1975, d.

After every 720 hours0.00833 days 0.2 hours 0.00119 weeks 2.7396e-4 months of charcoal adsorber operation by verifyin.

within 31 days after removal, that a laboratory analysis of a rep.eson-tative 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 of Regulatory Guide 1.52, Revision 2, March 1978, e.

At least once per 18 months by:

1.

Verifying that the pressure drop across the combined HiDA filters and charcoal adsorber banks is less than 3 inches Water Gauge while operating the system at a flow rate of 4000 cfm i 10%.

2.

Verifying that on a safety injection signal or high radiation signal from the air intake stream, the system automatically diverts its inlet 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 Water Gauge relative to the outside atmosphere at a system flow rate of 4000 cfm i 10% (2 3000 cfm recirculation and 5 1000 cfm fresh air),

f.

After each complete or partial replacement of a HEPA filter bank by verifying that the HEPA filter banks remove greater than or equal to 99.95% of the 00P when they are tested in place in.accordance with ANSI H510-1975 while operating the system at a flow rate of 4000 cfm i 10%.

g.

After each complete or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to 99.95% of a halogenated hydrocarbon refrigerant test gas when they are tested in placa in accordance with ANSI N510-1975 while operating the system at a flow rate of 4000 cfm 10%.

SEQUOYAH - UNIT 2 3/4 7-18 Amendment No. 60, 77

_ PLANT SYSTEMS 3/4.7.8 AUXILIARY BUILDING GAS TREATMENT SYSTEM LIMITING CONDITION FOR OPERATION 3.7.8 Two independent auxiliary building gas treatment filter trains shall be OPERABLE.

APPLICABILITY:

Modes 1, 2, 3 and 4.

ACTION:

With one auxiliary building gas treatment filter 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 COLO SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SU,RVEILLANCE REQUIREMENTS l

4.7.8 Each auxiliary building gas treatment filter train shall be demonstrated OPERABLE:

a.

At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flow through the HEPA filter and charcoal adsorber train 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 on, 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 in any ventilation zone communicating with the system by:

1.

Verifying that the cleanup system satisfies the in place testing acceptance criteria and uses the test procedures of Regulatory Positions C.5.a C.5.c and C.S.d of Regulatory Guide 1.52, Revision 2 March 1978 (except for the provisions of ANSI N510 Sections 8 and 9), and the system flow rate is 9000 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 Guide 1.52, Revision 2 March 1978, meets the laboratory testing criteria of Regulatory Position C.6.a of Regulatory Guide 1.52, Revision 2, March 1978.

3.

Verifying a system flow rate of 9000 cfm + 10% during system operation when tested in accordance with NSI N510-1975.

4 SEQUOYAH - WIT 2 3/4 7-19

PLANT SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 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 repre-sentative carbon sample obtainec 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 of Regulatory Guide 1.52, Revision 2, March 1978.

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 3 inches Water Gauge while operating the filter train at a flow rate of 9000 efm i 10%.

2.

Verifying that the filter trains start on a Containment Phase A Isolation test signal; or a high radiation signal from the fuel pool radiation monitoring system or the auxiliary buildingl ventilation monitoring system.

3.

Verifying that the system maintains the spent fuel storagt area and the ESF pump rooms at a pressure equal to or more negative than minus 1/4 inch water gauge relative the outside atmosphere while maintaining a vacuum relief flow greater than 2000 cfm and a total system flow of 9000 cfm i 10%.

4.

Verifying that the heaters dissipate 32 1 3.2 kw when tested in accordance with ANSI N510-1975.

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 99.95% of the 00P when they are tested in place in accordance with ANSI N510-1975 while operating the system at a flow rate of 9000 cfm 1 10%.

f.

After each complcte or partial replacement of a charcoal adsorber bank by verifying that the charcoal adsorbers remove greater than or equal to,99.95% of a halogenated hydrocarbon refrigerant test gas when they are tested in-place in accordance with ANSI N510-1975 while operating the system et a flow rate of 9000 cfm 1 10%.

SEQUOYAH - UNIT 2 3/4 7-20 Amendment No.77

REFUELING OP_ERATIONS SURVEILLANCE REQUIREMENTS g entinued) 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 representa-tive carbon sample obtained in accordance with Regulatory Position C.6.b of Regulatory Guide 1.52, Revision 2. March 1978, w ts the laboratory testing criteric of Regulatory Position C.6 a of Re0ulatory Guide 1.52, Revision 2, March 1978.

d.

At least once per 18 months by:

1.

Verifying that the pressure drop across the combined HEPA filters and charcoal adsorber banks is loss than 3 inches Water l

Gauge while operating the filter train at a flow rate of 9000 cfm l

l t 10%.

{

?.

Verifying that the filter train starts on a Containment Phase A Isolation Test Signal; or a high radiation signal from the i

fuel pool radiation monitoring system or the auxiliary building l'

ventilation monitoring system.

3.

Verifying that the heaters dissipate 32 1 3.2 kw when tested in accordance with ANSI N510-1975.

e.

After each complete or partial replacement of a HEPA filter bank by j

veritying that the HEPA filter banks remove greater than or equal to 99.95% of the DOP when they are tested in place in accordance with 3

ANSI N510-1975 while operating the system at a flow rate of 900A cfm i 10%.

l f.

After each complete or partial replacement of a charcoal adsorcer bank by verifying that the charcoal adsorbers remove greater than or equal to 99.95% of a halogenated hydrocarbon refrigerant test gas when they are tested in place in accordance with ANSI N510-1975 I

while operating the system at a flow rt.te of 9000 cfm i 10%.

l 4

1 I

1 1

SEQUOYAH - UNIT 2 3/4 9-15 Ament tent No. 77

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