ML20079A059

Proposed Tech Specs cold-leg Injection Accumulators

ML20079A059
Person / Time
Site:	Sequoyah
Issue date:	10/02/1990
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20079A057	List: ML20079A054 ML20079A059
References
NUDOCS 9010110166
Download: ML20079A059 (8)

Text

$, 5,q$Fr. ':

41' N

>,'\\

( 9n. c.

t),;c c.

ol3(.p; s,.

s, e :e

%j(/h: 4

,.t y:

r "i*

_')-

t ty

% v f./

1. P@;..,

Ehl**lm ENCLOSURE 1~

9l%y@. > " _

!Q

?

PROPOSED TECHNICAL SPECIFICATION CHANGE g -, 3 s.;,,,

3

-m yglocfi..

M-SEQUOYAH NUCLEAR' PLANT UNITS 1 AND 2 giu ; a:

o

?:L.', i DOCKET NOS. 50-327 AND 50-328 d.k, e;N

...'6',,

fm Nn

'(TVA-SQN-TS-90-13) 3,

(*

$_ ' 4 i J

s ' j '.,

M.;,sa,..,

e v.

-\\ ' T R,1',.

$t 3

r e

b

'.r..

-LIST OF ATTECTED PAGES 1

y Wi V

Unit l' M :-

3/4 5-1 r

b 3/4 5,

m..

n. m -

T'?.:[ -

Unit-2 4

' i 1 o.,;) 3

%y'e d. )' si 1

ik ?,,

3/4 5-1.

.p,o g,.

3/4 5-2 4

4' Jl>g!g",'.;.

!, % s '

?-

i! J

\\Lym t '

3 v

{j.h ~If '

+

n.

\\.

1d'i r

FF n!N j _

h

( ';3.

g

.r},

(. k m;

1, <

w i if 9'.m%.:,we

~.

arm.

y ;r m

w gi[g 8

3 gy{ '

1 N'

lMai ',

.x

I

[

y n:

i:;:

(

r

.s 7

. hq-[

, i

-!} i

)

yg,.yi: g nj30166 901002 "M -

c POR : ADOCK 05000?27 "l

PDC m~i:1. n....,

l. p, '

[:

{'g_ sj) q k a

'\\ '-

i I

i 3/4.5 EMERGENCY CORE COOLING SYSTEMS (ECCS) 3/4.5.1 ACCUMULATORS i

COLO LEG' INJECTION ACCUMULATORS LIMITING CONDITION FOR OPERATION 3.5.1.1 Each cold leg injection accumulat,or shall be OPERABLE with' a.

The isolation valve open, b.

A contained borated water volume of between 7615 and 8094 gallons of borated water, P.144 i

c.

Between 2400 and 2700 ppm of boron, and y

d.

A nitrogen cover-pressure of between 600 and 663 psig.

APPLICABILITY: MODES 1, 2 and 3.*

ACTION:

With one cold leg injection accumulator inoperable, except as a result a.

of a closed isolation valve, restore the inoperable accumulator to OPERABLE status within one hour or be in at least HOT STANDBY within i

i the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

i b.

With one cold leg injection accumulator inoperable due to the isola-I tion valve being closed, either immediately open the isolation valve or be in HOT STANDBY within one hour and be in HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

c.# WHh One pres:gre Or watew4evel-ch;nn:1 inoper:ble p;r :::ccul:ter, r: turn the inep: cable channel t: OPE"BLE : tate: within 30 d:y: Or b: in et 1:::t HOT STANOBY within the next 5 50;r: :nd h HOT g

0""iOOWii-wi-thin the f 110uing 5 h ur:.

1 d.y h4th-meee-than :n: channe4-(pre nure Or w t:r 1"Ov:1) %0p:r:ble p r

umuleter, i n: dict:1y d::!:r: th: :ff::ted :::umul:ter(:)

%:per:510.

f r

t

)

• Pressurizer pressure above 1000 psig.

--#Aet4 ens-c :nd d ere in eHeot-unt!' the restart of UM t 2 ' rem th0 UM t 2

-~4yc4: ^ r:!ucMw]-outMys,.-

]

4 SEQUOYAH - UNIT 1 3/4 5-1 Amendment No. 124, 140 VAY 111990

j 1

i EMERGENCY CORE COOLING SYSTEMS (ECCS)

(C '

SURVEILLANCE REQUIREMENTS 4.5.1.1.1 Each cold leg injection accumu?ator shall be demonstrated OPERABLE:

a.

At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by:

1.

Verifying, by the absence of alarms or by measurement of levels and pressures, the contained borated water volume and nitrogen cover pressure in the tanks, and 1

2.

Verifyingthateachcoldleginjectionaccumulatorisolation valve is open.

t b.

At least once per 31 days and within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after each solution volume increase of greater than or equal to 1% of tank volume by verifying the boron concentration of the cold leg injection accumulator solution.

t c.

At least once per 31 days when the RCS pressure is above 2000.psig by verifying that power to the isolation valve operator is distonnected by removal of the breaker from the circuit.

\\

d.

Atleastonceper18monthsbyverifyingthateachcoldleginjection accumulator isolation valve opens automatically under each of the following conditions:

I' 1.

When an actual or a siamlated RCS pressure signal exceeds the I

P-11 (Pressurizer Pressure Block of Safety Injection) setpoint, Fb 2.

Uponreceiptofasafetyinjectiontestsignal.

4.5.1.1.2 Each accumulator water level and pressure channel shall be demonstrated OPERABLE:4 l

a.

At least once per 31 days by the performance of a CHANNEL FUNCTIONAL TEST.

b.

At least once per 18 months by the performance of a CHANNEL CALIBRATION.

V S fL 4.F l.l e ?-, TH e Cot.o Leo LTrtisoo A ttt4 mu t gioit

- $ tuna Resret.T To.T.s Comiositro Ohnt6at.c h Owe Levet 0 gannet. AWA 0've htt Is OrtitAhl 14 AttoRD ANtf kil'rH SR 9.f. l. l. 2 e Y Z ^20 - b TIO 59.401 RPPuss Om.y To Thost CHAM oets Rcu rt L4Poe Fog AN orennst.c Coco LtG INatt.riou Act c4 mu tgrog,

g R128 SEQUOYAH - UNIT 1 3/4 5-2 Amendment No. 12,124 August 11, 1989

l e

3/4.5 EMERGENCY CORE COOLING SYSTEMS A

3/4.5.1 ACCUMULATORS C010 LEG INJECTION ACCUMULATORS i

s LIMITING CONDITION FOR OPERATION 3.5.1.1 Each cold leg injection accumulator shall be OPERABLE with:

The isolation valve open, a.

y w

b.

A contained borated water volume of between borated water.

and lions of cs t ed

+6 c.

Between and pm of boron, OIT removoli and

'h 8

d.

A nitrogen cover pressure of between -eee andw

'1gis PoKTioM Jush icAlle has sig.

b e su W Hed APPLICABILITY: M0hl,2and3.,

Pntviousi.

susme s

in is s>ane 75 (" " E 8ba-2A -Za.

ACTION:

With one cold leg injection accumulator inoperable, except as a a.

result of a closed isolation valve, restore the inoperable accumulator to OPERABLE status within one hour or be in at least H STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, b.

With one cold leg injection accumulator inoperable due to the isolation valve being closed, either immediately open the isolation valve or be in HOT STANDBY within one hour and be in HOT SHUTD within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

c.

Uith one pre;;ur: cr u:t^r 1 v:1 F "nt! i noper:5'" pcr n:u-"!:t:r, return th: ineptr:ble ch:"nel t: OPEPf 3tE ttate; within 30 day; er be in at ? cast MOT ST^MDSY "!thi" the next-S h ur; rd 'n MOT Rll3,

-0"UT00W" J thir, tht f 011: win;; 5 h;ur;.

l

-d # With r, crc th:n :n:

F'^n 1 (prenure er t!:ter Ice:!) 4"ep^r:b!:

occa;ulatcc, ir; dicitly d +1aee-the-af4est+d-accurelcter(;)

p;r

-incg re, bit.-

}

" Pressurizer pressure above 1000 psig.

-4Aet4 ens-e-and--d-eve-4n-e44+et-unt i' the re' ter4-ef-Unit 2 f a I

Cycle 4 ref ueHng-outagc.

r, th Unit :

e Rl!3 1-1 i

h SEQUOYAH - UNIT 2 3/4 5-1 Amendment No. 113 August 11. 1989

.:t.v. h i Jis

EMERGENCY CORE COOLING SYSTEMS SURVEILLANCE REQUIREMENTS

)

4.5.1.1.1 Each colo leg injection accumulator shall be demonstrated OPERABLE:

a.

At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by:

l.

Verifying, by the absence of alarms or by measurement of levels and pressures, the contained borated water volume and nitrogen cover pressure in the tanks, and 2.

Verifying that each cold leg injection accumulator isolation valve is open, b.

At least once per 31 days and within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after each solution volume increase of greater than or equal to 1% of tank volume by verifyingtheboronconcentrationofthecoldleginjection accumulator solution, c.

At least once per 31 days when the RCS pressure is above 2000 psig i

by verifying that power to the isolation valve operator is disconnected by removal of the breaker from the circuit, d.

At least once per 18 months by verifying that each cold leg injection accumulator isolation valve opens automatically under each of the following conditions:

l( -

_k) 1.

When an actual or a simulated RCS pressure signal exceeds the P-il (Pressurizer Pressure Block of Safety injection) setpoint, 2.

Uponreceiptofasafetyinjectiontestsignal.

4.5.1.1.2 Each accumulator water level and pressure channel shall be demonstrated OPERABLE:#

5 a.

At least once per 31 days by the performance of a CHANNEL FUNCTIONAL TEST.

b.

At least once per 18 months by the performance of a CHANNEL CAllBRATION.

hrrte now E WiTH REsPtf.T Te S R 4.S'. l. t. 2., THE Coa Lc4 Accum uc6 tor 15 con 5 80 mit -

O L t.A 6 LE 1 F ONE LCVCt (HAvueu A90 Ows Perss u nt Ow Awart I. Derit6 ALE P

La Attonowet Myu s R 4.s. t.1, 2.. L L f... ; L:

, S R 9.o 3 A vues ONuy To Tsost CHawucts RcLtro t4roro Fen (19 OPcit A 6Lc (oto Ltc, g

'ContT804 AttL4 mu tATo p.

SEQUOYAH - UNIT 2 3/4 5-2 Amendment No,113 Rll August 11, 1989

n.

w~

I : (-

f';

~

l o-s i 0.

(

ENCLOSURE 2-6 ;.

0, PROPOSED TECHNICAL JPECIFICATION CKANGE 1

4 ij J;. s SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 0 -.

I

w.a' DOCKET NOS. 50-327 AND 50-328 q-.

'(TVA-SQN-TS-90-13)'

ff DESCRIPTION AND JUSTIFICATION FOR DELETION OF-THE SURVEILLANCE REQUIREMENTS 1 p' FOR COLD-LEG ACCUMULATOR. INSTRUMENTATION AND THE ASSOCIATED ACTION STATEMENTS

,s;.

3,.,'

b; Il5,')

'. j:. _

e<%;

I t'

im i

t 1.,

y.I I, t

[.;)'

1,%

,i I.

)

l;bi-f r'

16..

thi ?

bs

ENCLOSURE 2 3

Description of Change Tennessee Valley Authority proposes to modify the Sequoyah Nuclear Plant (SQN) Units 1 and 2 Technical Specifications (TSs) to revise TS 3/4.5.1 to i

delete Action Statements e and d and the associated footnote.

The requested change will also modify Surveillance Requirement (SR) 4.5.1.1.2 by adding a footnote to allow one level and one pressure channel to be 1

inoperable and maintain cold leg accumulator operability.

Reason for Change NRC issued by letter dated August 11, 1989, amendments to the SQN Units 1 and 2 TS 3/4.5.1 adding Action Statements e and d that provide actions to t

follow in the event SR 4.5.1.1.2 could not be met.

NRC staff stated in its letter that the issuance of action statements governing the operability of the monitoring instrumentation for the cold-leg accumulators (i.e., level and pressure instruments) was a generic issue for Westinghouse Electric Corporation's pressurized water reactors (PWRs);

and therefore these amendments would only be effective until the restart of Unit 2 from its Cycle 4 refueling outage, currently scheduled for November of 1990.

This would provide approximately 18 months for the NRC staff to work with the Westinghouse Owners Group (WOG) to develop a generic solution to this issue that is applicable for all Westinghouse PWRs.

TVA submitted by letter dated May 4, 1990. TS change 90-13, which was consistent with WOG Methodically Engineered, Restructured, and Improved. Technical Specification (MERITS).

In review of TVA's request for approval prior to expiration of the current amendment upon start-up from the ongoing Unit 2 Cycle 4 refueling outage, NRC noted that MERITS has not i

yet been approved; accordingly this revision is being proposed for incorporation until either MERITS can be implemented or NRC considers the generic issue resolved.

Justification for Change i

The deletion of SR 4.5.1.1.2, as proposed in the TVA letter to NRC dated May 4, 1990, can be justified, thus the interim proposed change can be justified as conservative relative to the deletion. As described in t*.e May 4 letter, the deletion is justified because of the fact that accumulator level and pressure are control functions on Westinghouse plants and do not perform a protection function.

In addition, the limiting condition for operation (LCO) only addresses the control parameters, not the instrumentation utilized to monitor the parameters.

The purpose of the LCO is to ensure the operability of the cold-leg accumulators and not the instrumentation channels since the LCO does not include the channels' instrumentation. The availability of the instrumentation is indirectly controlled by the SR on the level and pressure (SR 4.5.1.1.1 a and b) that must be performed to comply with the LCO. Similar situations exist for other parameters, such as refueling water storage tank level and temperature, where the parameters are required to be verified to be within limits but the instrumentation itself is not subject to a specification-dictated SR nor tied to RWST operability via action statements.

The acceptability of the instrumentation is ensured by the normal instrumentation calibration.

y s

f Y,

,.~ < -

i 2

3 1

U This justification provides the basis to' completely delete SRs for cold-leg accumulator instrumentation, which is consistent with the j

p' proposed MERITS effort. A more conservative change to retain the i

requirement for one-half of the level and pressure channels for cold-leg accumulator operability has been proposed in the interim until MERITS is i

by approved. Based on the justification to modify SR 4.5.1.1.2 for level and pressure instrumentation, Action Statements e and d of LCO 3.5.1.1 and the associated footnote have been deleted.

For these reasons and the above justification, the proposed revision is acceptable and provides an additional degree of assurance that instrumentation utilised to verify i

[

cold-leg accumulator operability is available.

If the proposed complement of instrumentation cannot be satisfied, SR 4.0.3 will be applicable and actions for an inoperable cold-leg accumulator will-be met.

i 1

l:

t l

r F

Y r

'I b

t

[

a e

v i.

I'

-