Text

Proposed Tech Specs,Providing Clarification to Current TS Requirements for Containment Isolation Valves
	ML20211K172
Person / Time
Site:	Sequoyah
Issue date:	08/30/1999
From:	; TENNESSEE VALLEY AUTHORITY
To:	;
Shared Package
ML20211K157	List: ML20211K152; ML20211K172;
References
	NUDOCS 9909070118
	Download: ML20211K172 (19)
	v • d • e

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ENCLOSURE 2

. TENNESSEE VALLEY AUTHORITY SEQUOYAH PLANT (SQN)

UNITS 1 AND 2 PROPOSED TECHNICAL SPECIFICATION (TS) CHANGE TS MARKED PAGES I. AFFECTED PAGE LIST Unit 1 3/4 6-1 3/4 6-17 3/4 6-18 B 3/4 6-3a j I

Unit 2 1

3/4 6-1 {

3/4 6-17 3/4 6-18 B 3/4 6-3a II. MARKED PAGES See attached.

I 1

E2-1 i

9909070118 990830 PDR ADOCK 03000327 P PDR

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3/4.6 CONTAINMENT SYSTEMS 3/4,6.1 PRIMARY CONTAINMENT CONTAINMENT INTEGRITY LIMITING CONDITION FOR OPERATION .

3.6.1.1 Primary CONTAINMENT INTEGRITY shall be maintained.

APPLICABILITY: MODES 1,'2, 3 and 4.

ACTION:

Without primary CONTAINMENT INTEGRITY, restore CONTAINMENT INTEGRITY within one hour 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 .

SURVEILLANCE REQUIREMENTS 4.6.1.1 Primary CONTAINMENT INTEGRITY shall be demonstrated:

a. At e per 31 days by verifying that all penetrati

R16 capable of bein b OPERABLE containme

ic isolation valves and required to be e ent conditions are Og\ e,te closed by valves, blin p , or ed automatic valves '

secured in t pctritions , except for valves t en under R207 M. ative control as permitted by Specification 3.6. . ,

R134

b. By verifying that each containment air lock is in compliance with l

+

the requirements of Specification 3.6.1.3.

c. Perform required visual examinations and leakage rate testing in R221 accordance with the Containment Leakage Rate Testing Program.

~_

Except located h @he ta flanges, and deactivated inside ntainment orautomatic the main valves which vaults and are locked, sealed or otherwise see -

osed position. These penetrations shall beA osed during eae -

except that such,,,,ygr1LicaticE need not be performed more often than once per R195 I

i

! February 5, 1996 3/4 6-1 Amendment Nos. 12, 130, 176, 191, SEQUOYAH - UNIT 1

j. 203, 217 t.

1

.. O . o

. CONTAINMENT SYSTEMS hN -3/4.6.3-' CONTAINMENT ISOLATION VALVES Nhh. .

LIMITING CONDITION FOR OPERATION 3.5,3 Each containment isolation valve shall be' OPERABLE.* R207 i

APPLICABILITY: MODES li.2, 3 and 4.

ACTION:

a. With one or more of ' the isolation valve (s) , except containment vacuu - R207 ef isolation valve (s) , inoperablei maintain at least one is olen valv ERABLE in each affected penetration that is open a Ither:

inoperable valve (s) to OPERABL atus within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , R201 l

. gg 1. Restore or '

i A Isolate eacn affected e tra on within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months 'by use of at least 2.

one deactivated automa y secured in the isolation position, or .

3. Isolat ch affected penatration within rs by use of at least o osed manual valve or blind flange; 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 i LD M

SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

8 4>, .With one or more containment vacuum relief isolation valve (s) inop ,

lR207 the valve (s e_ returned to OPE _RABLE_ status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .,er b_ -

ggg . ! 'lf .ft " .T CT. f.' Nit.Sih t4: 5:E f5

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10Sf:, rhy ip _ COLP '? - u O "

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=e, The provisions of Specification 3.0.4 do not apply. lR207 SURVEILLANCE REQUIREMENTS r- ..

R207 4.6'.3.1 Deleted

1. Penetration flow path (s) may be unisolated intermittently under R221 administrative controls. )

2. Enter the ACTION of LCO 3.6.1.1, " Primary Containment" when containment isolation valve leakage results in exceeding the overall containment leakage rate acceptance criteria.

3GR.T' O.

February 5, 1996 3/4 6-17 Amendment No. 12, 197, 203, 217

'SEQUOYAH - UNIT'1.

d O O .

CONTAINMENT SYSTEMS N

SURVEILLANCE REOUIREMENTS (Continued)

R207 4.6.3.2 Each automatic' containment isolatio shall be demonstrated l OPERABLE @ rip; th COLD :::UTOOQw NC L "ETUCL]Qyat least once per 18 m by: -- -

a. Verifying that on a Phase A containment isolation test signal, each Phase A isolation valve actuates to its isolation position. j

b. Verifying that on a Phase B containment isolation test signal, each Phase B isolation valve actuates to its isolation position. j

c. Verifying that on a Containment Ventilation isolation test signal, each Containment Ventilation Isolation valve actuates to its isolation position.

R85

d. Verifying that on a high containment pressure isolation test signal, each Containment Vacuum Relief Valve actuates to its isolation position. .

I

e. Verifying that on a Safety Injection test signal that the Normal R105 Charging Isolation valve actuates to its isolation position.

R207 4.6.3.3 The isolation time of each power operated or automatic containment I isolation valve shall be determined to be within its limit when tested pursuant to Specification 4.0.5. l! $;

4.fo.3 9 fik lessf enee per 3l N4yS , Ver'. 'l$b ab\ ynektblons R124 ned cep<Lle d le:n3 closed by OPE 2ABLE ade *nme t ado.,,2c. is.Idan wIvag aJ ray; cal +. he el sed ,

a.cc daat e ,dLos ace wl<a s,, bI.'d dac:,3 elosed 63 v<Iveg seucad 6 s nges, or de ad.v* +ad <oLd:e

'N'*Y " ofen und'r ti,e:r p c: & c , except 'Gr v'Ives aol :a;s +< Me. c .k' l .

hl:,A FI<,3es ~l da d.*vdad ad.,,,J.a valas sea,cb valus, ded i>s de& e.,nulos or &-fe: >m.f or 14 e w l,;ct, a re. lee

,,,e , <&., va ta vaults a,d are lacKad saaled .c Aara:se sacueL :., L. etosed poe:+.6n. 71,ese pe,dedie,s .c4J+t& ba.

,iac:f kd close.l obe;.,3 end cotD snuroeaa exeep+d+an -ile,,

.< u ci, ver:Ech .*ed not be fer Sr. ad more. '

o.,ca par- 9.2 da.,r.

3/4 6-18 Amendment No. 12, 81, 101, 120

/ SEQUOYAH - UNIT 1 203

O . . O CONTAINMENT SYSTEMS 3/4.6.3 CONTAINMENT ISOLATION VALVES (Continued)

BASES R207 The opening of penetration flow path (s) on an intermittent basis under administrative control includes the following considerations: (1) stationing an operator, who is in constant communication with the control room,' at the valve controls, (2) instructing the operator to close these valves in an accident situation, and (3) assuring that the environmental conditions will not preclude access tc close the valves and that this action will prevent the release of radioactivity outside the containment. For valves with controls located in the control room, these conditions can be satisfied by including a specific reference to closing the particular valves in the emergency procedures, since communication and environmental factors are not affected because of the location of the valve controls.

Note that due to competing requirements and dual functions associated with R201

. the containment vacuum relief isolation valves (FCV-30-46, -47, and -48), the air supply and solenoid arrangement is designed such that upon the unavailability of Train A essential control air, the containment vacuum relief isolation valves are incapable of automatic closure and are therefore considered inoperable for the containment isolation function without operator action.

The containment vacuum relief valves (30-571, -572, and -573) are qualified to perform a containment isolation function. These valves are not powered from any electrical source and no spurious signal or operator action '

could initiate opening. 'The valves'are spring loaded, swing disk (check) valves with an elastomer seat. The valves are normally closed and are equipped with limit switches that provide fully open and fully closed indication in the main control room (MCR). Based upon the above information, a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months allowed action time is appropriate while actions are taken to return the containment vacuum relief isolation valves to service.

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i June 13, 1995 i B 3/4 6-3a Amendment No. 197, 203 SEQUOYAH - UNIT 1

\v (_./

-s 3/4.6 CONTAINMENT SYSTEMS

'3/4.6.1 PRIMARY CONTAIfMENT CONTAINMENT INTEGRITY LIMITING CONDITION FOR OPERATION -

3.6.1.1 Primary CONTAINMENT INTEGRITY shall be maintained.

APPLICABILITY: MODES 1, 2, 3 and 4. ,

ACTION:

Without primary CONTAINMENT INTEGRITY, restore CONTAINMENT INTEGRITY within one hour 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 .

SURVEILLANCE REQUIREMENTS 4.6.1.1 Primary CONTAINMENT INTEGRITY shall be demonstrated:

a. D a er 31 days by verifying that all penetrati g capable of being b OPERABLE containment._autom1f1"c isolation valves and required to be c ing e Tdent conditions are gQd '

closed by valves, bli And n secured i pnitions, except for valves t a or e - d automatic valves en under jtdmintsfrative entrol as permitted by Specification 3.6.3. ,

p193

b. By verifying that each containment air lock is in compliance with R117 the requirements of Specification 3.6.1.3.

c. Perform required visual examinations and leakage rate testing in accordance with the Containment Leakage Rate Testing Program. R207 n es, and deactivated automatic valves which are <

located inside the annulus ent or the main stea s are R183 locked, sealed or otherwise secured in ition. These penetrations shall be verified cl OLD SHUTDOWN excep .

verif not be performed more often than once per 92 days.

February 5, 1996 3/4 6-1 Amendment No. 117, 167, 183, 193, SEQUOYAH - UNIT 2 207

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CONTAINMENT SYSTEMS 3/4.6,3 CONTAINMENT ISOLATION VALVES f w; j

LIMITING CONDITION FOR OPERATION 3.6.3 Each containment isolation valve shall be OPERABLE.* '

APPLICABILITY: MODES-1, 2, 3 and 4.

ACTION:

R193

a. ith one or more of the isolation valve (s), except containment vacuum ,

re isolation valve (s) , inoperable, maintain at least one isol

n R188 1 valve O LE in each affected penetration that is open and er: )

ygggg7 1. Restore the in able valve (s) to OPERABLE us within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , or A 2. Isolate each affected pen ion in 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months by use of at least one deactivated automatic va ured in the isolation position, or penetration within 4 rs by use of at least j

3. Isolate each affe I

one closed al valve or blind flange; or I

, 4. B 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 l HUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . i g gggy-B -6s - With one or more containment vacuum relief isolation valve (s) inoperable _

t_he_ valve ( s ) m_ust'be returned to OPERABL.E status _within 72_ hours.f6: b; i5 R188 i 7 d 1;;;t "OT CT,~OO',' wi t.'.in U.; . cat C~ hour: T..; i. ;OLO S E CO;"!jithir l ghe followin5 2 0 h;;rs . f - -- ~-

1 g lR193 '

(C am, The provisions of Specification 3.0.4 do not apply.

SURVEILLANCE REQUIREMENTS lR193 1 4.6.3.1 ' Deleted {

'i1 i

I

~*1. Penetration flow path (s) may be unisolated intermittently under administrative controls.

R207

2. Enter the ACTION of LCO 3.6.1.1, " Primary Containment" when containment isolation valve leakage results in exceeding the overall containment leakage rate acceptance criteria.

J'aSERT C February 5, 1996 3/4 6-17 Amendment No. 193, 207 SEQUOYAH - UNIT 2

O O ,

I CONTAINMENT SYSTEMS

~.

SURVEILLANCE RE0VIREMENTS (Continued)

R193 4.6.3.2 Each agtomatic conta<inment_ isolation valve shall be demonstrated l OPERABLEQfiFqth: COLO "UT."~'"" Or REFUEL!"C "^00 at least once per 18 months by:

a. Verifying that on a Phase A containment isolation test signal, each Phase A isolation valve actuates to its isolation position.

b. Verifying that on a-Phase B containment isolation test signal, each Phase B isolation valve actuates to its isolation position.

c. Verifying that on a Containment Ventilation isolation test signal, each Containment Ventilation Isolation valve actuates to its isolation position.

R72

d. Verifying that on a high containment pressure isolation test signal, each containment vacuum relief valve actuates to its isolation position. i R90

e. Verifying that on a Safety Injection test signal that the Normal Charging Isolation valve actuates to its isolation position.

R193 4.6.3.3 The isolation time of each power operated or automatic containment isolation valve shall be determined to be within its limit when tested pursuant to Specification 4.0.5. (

4.6 3.# A 6- lea.sf onec per 31 2*gr, v e<.

d .t Il pen,b.fl,nfR109 C)PEAABLE co.d< n ,e,.S hot cafalal<. of being c.losed by Clos e iso la$5n v< lve s and regu,' red +o b e-ajoaaf.c cond.+:o.,s <<e cIase d 6y v. lies , bI.;d 1

do,. y acc;da.t

-Qt, da <e+;vdad < den die v< Ive s sceored in ,l es, a

&< vcI"' R<S ar' *PM U" k

.d,a;c p c:+:ons, con te=I.eneyt ad-.n.s+cA.'a.

Ex caft v<lves bl.'n, c:de

,hd A fl<f s and a.,,,,

Ne.<ehude)

Jo,- , , c, ., +,, ,,

<u$oeb.*e n a + ,, tb e valv wuer <re 1. c- 4 4,

~<.n s-la ..n v. Ive v<aI+s a d are toekad , sealed or . L wac<.

44e cloca/ p.e. L . There pena +,.4,on s Aall be secureel i.,

eack <btD Muroowa excep & 4La+

var. fed closed dar.., !**fL QNen YN* A SUCN Ver.$cshoon nee no$ be fr </M C em Per 92 d<gs

M e 13, 1995 3/4 6-18 Amendment No. 72, 90, 104, 109, SEQUOYAH - UNIT 2 193

O O CONTAINMENT SYSTEMS

, BASES 3/4.6.3 CONTAINMENT ISOLATION VALVES (Continued)

R193 The opening'of penetration flow path (s) on an intermittent basis under administrative control includes the following considerations: (1) stationing an operator, who is in constant communication with the control room, at the valve controls, (2) instructing the operator to close these valves in an accident situation, and (3) assuring that the environmental conditions will not preclude access to close the valves and that this action will prevent the release of radioactivity outside the containment. For valves with controls located in the control room,. these conditions can be satisfied by including a specific reference to closing the particular valves in the emergency procedures, since communication and environmental factors are not affected because of the l location of the valve controls. l Note that due to competing requirements and dual functions associated with R188 the containment vacuum relief isolation valves (FCV-30-46, -47, and -48), the air supply and solenoid arrangement is designed such that upon the unavailability of Train A essential control air, the containeent vacuum relief

.. isolation valves are incapable of. automatic closure and are therefore considered inoperable for the containment isolation function without operator action.

The containment vacuum relief valves (30-571, -572, and -573) are qualified to perform a containment isolation function. These valves are not powered from any electrical source and.no spurious signal or operator action could initiate opening. The valves are spring loaded, swing disk (check) O, 1 valves with an elastomer seat. The valves are normally closed and are equipped with limit switches that provide fully open and fully closed indication in the main control room-(MCR). Based upon the above information, a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months allowed action time is appropriate while actions are taken to return the containment vacuum relief isolation valves to service.

ZMER T E

June 13, 1995 Amendment No. 188, 193 SEQUOYAH - UNIT 2 B 3/4 6-3a

\

4 Insert Page INSERT A 1

, j

a. With one or more penetration' flow paths with one containment !

isolation valve' inoperable; except for containment vacuum relief isolation valve (s), isolate each affected penetration j within 4 hour4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months s:by use of at least one closed deactivated automatic valve, closed manual. valve, blind flange, or check valve with flow through the valve secured; and, verify # the affected-penetration flow path is isolated once per 31 days for isolation devices ~outside containment, and prior to

' entering MODE l4 from MODE 5 if not. performed within the previous 92 days for-isolation devices inside containment.

INSERT B

b. With one or more penetration flow paths with two containment i isolation valves inoperable; except_for containment vacuum relief isolation valve (s), isolate each affected penetration within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by use of at least one closed deactivated automatic valve, closed manual valve, or blind flange and verify # the affected penetration flow puth is isolated once per 31 days.

INSERT C

d. With any of-the above ACTIONS not met, 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 .

INSERT D

3. Isolation devices in high radiation areas may be verified by use of administrative means.

4. Isolation devices that are locked, sealed, or otherwise secured may be verified by use of administrative means.

INSERT E Isolation of a containment penetration flow path may include the use of a check valve with flow through the valve secured. This method of isolation.would involve stopping flow through the penetration' flow' path such that the check valve acts as a containment-isolation-barrier.

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ENCLOSURE 3 TENNESSEE VALLEY AUTHORITY SEQUCYAH NUCLEAR PLANT (SQN)

UNITS 1 AND 2 PROPOSED TECHNICAL SPECIFICATION (TS) CHANGE TS REVISED PAGES I. AFFECTED PAGE LIST Unit 1 3/4 6-1 3/4 6-17 3/4 6-18 B 3/4 6-3a Unit 2 3/4 6-1 3/4 6-17 3/4 6-18 B 3/4 6-3a II. REVISED PAGES See attached.

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3/4.6 CONTAINMENT SYSTEMS 3/4.6.1 PRIMARY CONTAINMENT

' CONTAINMENT INTEGRITY LIMITING CONDITION FOR OPERATION 3.6.1.1 Primary CONTAINMENT INTEGRITY shall be maintained.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

Without primary CONTAINMENT INTEGRITY, restore CONTAINMENT INTEGRITY within one hour 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 .

SURVEILLANCE REQUIREMENTS 4.6.1.1 Primary CONTAINMENT INTEGRITY shall be demonstrated:

a. Deleted.

b. By verifying that each containment air lock is in compliance with R134 the requirements of Specification 3.6.1.3.

c. Perform required visual examinations and leakage rate testing in R221 accordance with the Containment Leakage Rate Testing Program.

SEQUOYAH - UNIT 1 3/4 6-1 Amendment Nos. 12, 130, 176, 191, 203, 217, l

o

)

CONTAINMENT SYSTEMS 3/4.6.3 CONTAINMENT ISOLF. TION VALVES-LIMITING CONDITION FOR OPERATION 3.6.3 Each containment isolation valve shall be OPERABLE.* R207 APPLICABILITY: MODES 1, 2,.3 and 4.

ACTION:

a. With one or more penetration flow paths with'2D1 containment isolation valve inoperable; except for containment vacuum relief isolation valves (s) , isolate each affected penetration within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months by use of at least~one closed deactivated automatic valve, closed manual valve, blind flange, or check valve with flow through the valve secured; and, verify #

the affected penetration flow path is isolated once per 31 days for isolation devices outside containment, and prior to entering MODE 4 from MODE 5 if not performed within the previous 92 days for isolation devices inside containment.

b. With one or more penetration flow paths with tw2 containment isolation valves inoperable; except for containment vacuum relief isolation valves (s) , isolate each affected penetration within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by use of at least one closed deactivated automatic valve, closed manual valve, or blind flange and verify # the affected penetration flow path is isolated once per 31 days.

c. With one or more containment vacuum relief isolation valve (s) inoperable, the valve (s) must be returned to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ,

d. With any of the above ACTIONS not met, 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 .

e. The provisions of Specification 3.0.4 do not apply.

. SURVEILLANCE REQUIREMENTS 4.6.3.1 Deleted R207

1. Penetration flow path (s) may be unisolated intermittently under administrative controls.

R221

2. Enter the ACTION of LCO 3.6.1.1, " Primary Containment" when containment isolation valve leakage results in exceeding the overall containment leakage rate acceptance criteria.

3. Isolation devices in high radiation areas may be verified by use of j administrative'means.

4. Isolation devices that are locked, sealed, or otherwise secured may be verified by use of administrative means.

i SEQUOYAH - UNIT 1 3/4 6-17 Amendment No. 12, 197, 203, ;

217, '

f' CONTAINMENT SYSTEMS

, SURVEILLANCE REQUIREMENTS (Continued) 4.6.3.2 Each automatic containment isolation valve shall be demonstrated OPERABLE at least once per 18 months by:

a. Verifying that on a Phase A containment isolation test signal, each !

Phase A isolation valve actuates to its isolation position. I l

b. Verifying that on a Phase B containment isolation test signal, each i Phase B isolation valve actuates to its isolation position, j

c. Verifying that on a containment Ventilation isolation test signal, each Containment Ventilation Isolation valve actuates to its isolation position.

d. Verifying that on a higu containment pressure isolation test signal, each Containment Vacuum Relief Valve actuates to its R85 isolation position.

e. Verifying that on a Safety Injection test signal that the Normal Charging Isolation valve actuates to its isolation position. R105 4.6.3.3 The isolation time of each power operated or automatic containment isolation valve shall be determined to be within its limit when tested pursuant R207 to Specification 4.0.5.

4.6.3.4 At least once per 31 days, verify that all penetrations

not capable of being closed by OPERABLE containment automatic isolation valves and required .

to be closed during accident conditions are closed by valves, blind flanges, or !

deactivated automatic valves secured in their positions, except for valves that I are open under administrative control.

I

Except valves, blind flanges and deactivated automatic valves which are ,

located inside the annulus or containment or the main steam valve vaults and j are locked, sealed or otherwise cecured in the closed position. These !

penetrations shall be verified closed during each COLD SHUTDOWN except that l such verification need not be performed more often than once per 92 days.

1 i

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SEQUOYAH - UNIT 1 3/4 6-18 Amendment No. 12, 81, 101, 120 203, i

CONTAINMENT SYSTEMS l

3/4.6.3 CONTAINMENT ISOLATION VALVES (Continued) I

' BASES The opening of penetration flow path (s) on an intermittent basis under R207 administrative control includes the following considerations: (1) stationing ,

an operator, who is in constant communication with the control room, at the I valve controls, (2) instructing the operator to close these valver in an accident situation, and (3) assuring that the environmental conditions will not preclude access to close the valves and that this action will prevent the i release of radioactivity outside the containment. For valves with controls located in the control room, these conditions can be satisfied by including a i specific reference to closing the particular valves in the emergency I procedures, etnc communication and environmental factors are not affected because of '.he location of the valve controls. {

1 i

Note that due to competing requirements and dual functions associated with '

the containment vacuum relief isolation valves (FCV-30-46, -47, and -48), the R201 air supply and solenoid arrangement is designed such that upon the unavailability of Train A essential control air, the containment vacuum relief isolation valves are incapable of automatic closure and are therefore considered inoperable for the containment isolation function without operator action.

The containment vacuum relief valves (30-571, -572, and -573) are qualified to perform a containment isolation function. These valves are not powered from any electrical source and no spurious signal or operator action could initiate opening. The valves are spring loaded, swing disk (check) valves with an elastomer seat. The valves are normally closed and are equipped with limit switches that provide fully open and fully closed indication in the main control room (MCR). Based upon the above information, a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months allowed action time is appropriate while actions are taken to return the containment vacuum relief isolation valves to service.

Isolation of a containment penetration flow path may include the use of a check valve with flow through the valve secured. This method of isolation would involve stopping flow through the penetration flow path such that the check valve acts as a containment isolation barrier.

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SEQUOYAH - UNIT 1 B 3/4 6-3a Amendment No. 203,

3/4.6 CONTAINMENT SYSTEMS !

l

. .3/4.6.1 PRIMARY CONTAINMENT l

l- CONTAINMENT INTEGRITY

- LIMITING CONDITION FOR OPERATION

~ 3.6.1.1 Primary CONTAINMENT INTEGRITY shall be maintained.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

Without primary CONTAINMENT INTEGRITY, restore CONTAINMENT INTEGRITY within one l

hour 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' hours.

SURVEILLANCE REQUIREMENTS 4.6.1.1 Primary CONTAINMENT INTEGRITY shall be demonstrated:

l a. Deleted.

b. By verifying that each containment air lock is in compliance with the requirements of Specification 3.6.1.3. R117

c. Perform required visual examinations and leakage rate testing in accordance with the Containment Leakage Rate Testing Program.

R207 I

)

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SEQUOYAH - UNIT.2 3/4 6-1 Amendment No. 117, 167, 183, 193, 207 l

i l

CONTAINMENT SYSTEMS 3/4.6.3 CONTAINMENT ISOLATION VALVES LIMITING CONDITION FOR OPERATION 3.6.3 Each containment isolation valve shall be OPERABLE.*

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

a. With one or more penetration flow paths with ong containment isolation valve inoperable; except for containment vacuum relief isolation valves (s) , isolate each affected penetration within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months by use of at least one closed deactivated automatic valve, closed manual valve, blind flange, or check valve with flow through the valve secured; and, verify #

the affected penetration flow path is isolated once per 31 days for isolation devices outside containment, and prior to entering MODE 4 from MODE 5 if not performed within the previous 92 days for isolation devices inside containment,

b. With one cnr more penetration flow paths with tw2 containment isolation valves inoperable; except for containment vacuum relief isolation valves (s) , isolate each affected penetration within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by use of at least one closed deactivated automatic valve, closed manual valve, or blind flange and verify # the affected penetration flow path is isolated once per 31 days.

c. With one or more containment vacuum relief isolation valve (s) inoperable, the valve (s) must be returned to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

d. With any of the above ACTIONS not met, 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 .

e. The provisions of Specification 3.0.4 do not apply.

SURVEILLANCE REQUIREMENTS 4.6.3.1- Deleted lR193

1. Penetration flow path (s) may be unisolated intermittently under administrative controls.

R207

2. Enter the ACTION of LCO 3.6.1.1, " Primary Containment" when containment i isolation valve leakage results in exceeding the overall containment !

leakage rate acceptance criteria,

~#3. Isolation devices in high radiation areas may be verified by use of i administrative means.

4. Isolation devices that are locked, sealed, or otherwise secured may be !

verified by use of administrative means.

SEQUOYAH - UNIT 2. 3/4 6-17 Amendment No. 191, 207,

CONTAINMENT SYST.EME i

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, SURVEILLANCE REQUIREMENTS (Continued) '

4.6.3.2 Each attomatic containment isolation valve shall be demonstrated .

OPERABLE at least once per 18 months by:

a. Verifying that on a Phase A containment isolation test signal, each Phase A isolation valve actuates to its isolation position.

b. Verifying that on a Phase B containment isolation test signal, each l Phase B isolation valve actuates to its isolation position.

c. Verifying that on a Containment Ventilation isolation test signal,.

each Containment Ventilation Isolation valve actuates to its isolation position,

d. Verifying that on a high containment pressure isolation test signal, R72 each Containment Vacuum Relief Valve actuates to its isolation position.

e. Verifying that on a Safety Injection test signal that the Normal R90 Charging Isolation valve actuates to its isolation position.

4.6.3.3 The isolation time of each power operated or automatic containment R193

. isolation valve shall be determined to be within its limit when tested pursuant to Specification 4.0.5.

4.6.3.4 At least once per 31 days, verify that all penetrations

not capable of being closed by OPERABLE containment automatic isolation valves and required to be closed during accident conditions are closed by valves, blind flanges, or deactivated automatic valves secured in their positions, except for valves that are open under administrative control.

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Except valves, blind flanges and deactivated automatic valves which are located inside the annulus or containment or the main steam valve vaults and are locked, sealed or otherwise secured in the closed position. These

- penetrations shall be verified closed during each COLD SHUTDOWN except that such verification need not be performed more often than once per 92 days.

SEQUOYAH - UNIT 2 3/4 6-18 Amendment No. 72, 90, 104, 109, 193, E_

a CONTAINMENT SYSTEMS BASES 3/4;6.3 CONTAINMENT ISOLATION VALVES (Continued The opening of penetration flow path (s) on an intermittent basis under

' administrative control includes the following considerations: (1) stationing an operator, who-is in constant communication with the control room, at the valve controls, (2) instructing the operator to close these valves in an accident situation, and (3) assuring that the environmental conditions will not R193 preclude access to close the valves and that this action will prevent the

-release of' radioactivity outside the containment. For valves with controls located in_the control room, these conditions can be satisfied by including a specific reference to closing the particular valves in the emergency procedures, since communication and environmental factors are not affected because of the location of the valve controls.

Note that due to competing requirements and dual functions associated with 1 the containment vacuum relief isolation valves (FCV-30-46, -47, and -48), the air supply and solenoid arrangement is designed such that upon the

- unavailability of Train A essential control air, the containment vacuum relief isolation valves are incapable of automatic closure and are therefore

, considered inoperable for the containment isolation function without operator R188 action.

'The containment vacuum relief valves (30-571, -572, and -573) are qualified to perform a containment isolation function. These valves are not powered from any electrical source and no spurious signal or operator action could initiate opening. The valves are spring loaded, swing disk (check) valves with an elastomer seat. The valves are normally closed and are equipped with limit switches that provide fully open and fully closed indication in the main control room (MCR). Based upon the above information, a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months allowed action time is appropriate while actions are taken to return the containment vacuum relief _ isolation valves to service.

Isolation of a containment penetration flow path may include the use of a check valve with flow through the valve secured. This method of isolation would involve stopping flow through the penetration flow path such that the check valve acts as a containment isolation barrier.

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SEQUOYAH - UNIT 2 B 3/4 6-3a Amendment No. 188, 193, 1 I

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ML20211K172

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