ML20086H763

Proposed Tech Specs 3/4.4.4 & 3.4.9.3 Re Operability of PORVs & Associated Block Valves & Operability of RHR Suction Relief Valves,Respectively

ML20086H763
Person / Time
Site:	Callaway
Issue date:	12/04/1991
From:	UNION ELECTRIC CO.
To:
Shared Package
ML20086H761	List: ML20086H757 ML20086H763
References
NUDOCS 9112090348
Download: ML20086H763 (11)

Text

. _ - - - _ - - - _ - . _ - - _ - _ _ _ - - _ _ _ _ _ - _ _ _ _ - - - _ _ _ _ - _ _ _ - _ _ - - _ _ _ _ _ _ _ _ _ .

Attachment 4 to UL11RC- 252 7 PROPOSED ".'ECHt11 CAL SPECIFICATIOlt CllAliGES

~

Specification 3/4.4.4 3.4.9.3 m

COct ct <t Q O DiL (4()

mQ

-O v.O

+ i ma C- Q 02C T'

mlC wQ G Q. ti,

. I s

REVIs;cg; 3 AFACTOR COOLANT SYSTEM 3/4.4.4 RELIEF VAtVE,5, LIMITING CONDITION FOR OPERATION l 3 4.4 AWp:ett operated relief valves (PORVs) and their associated block y ves.shall be ERABLE.

APPLICABILITY: MODES 1, 2, and 3.* _

w i h p w c e- m e M .'in d b b ACTION: / bl6 tK vaivt (s) _~

b.lh

.me n.P0 V(s) inop rable because of excessive seat leakage,

a. With one within 1 hdur-eithe restore he PORV(s) to OPERABLE status or close the associated black valve (s); otas' ise, be in at least HOT STANDBY I

. (, .30Inin the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and ij\ H 07n-Gote S UTDOWN within the following hours.

b. With on RV inoperable due to c9uses other than excessive seat

~~le a ka gin , w hin 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> either restore the PORY to CPERABLE status, or

' ts i

close%he- sociated block valve and remove power from the bloc k valve; r ore the PORV to OPERABLE status within the follow

~d /4 n or be in HOT STAND t in the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and 1 0 H oT*

5HUTDOWN within ellowi 40' urs.

' 6 l'e s a t l eas t oruD

c. With both PORV(s)Nin perable due to ca'sesRher tha *e stive seat

)

leakage, within 1 , hour either restore e t PO tst o OPERABLE .

status or close h associated block val (e(-et nd power from t & lock valv +) nd be in HOT TANYY witttt the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and OT-C@te HUTDOWN tn n the followip M i urs, l .~""j W M ena^ ae ~ %~-)~~% '4coperaMey-w&4h4*-1-hou r; (1)-restore

,/,. d. er-e41eek-vahefs hlek v2 404-) to OPERABLE-statuer ee -shee--the-Meek-veheb)-end-

' Inscri P . "ee"e=eva power- f rom tu bhsbvalve(s)3--o-close-the-#GAV-and-cenewa S

.-power. trom. it&-at,s4G14ted- :o h noid-.vehe; ond - (2) -apMCUCh.-t --or i c Steve .4s-4ppr4peteter-fee-the-r t+ola.t.adJORV/rt4 j

( f --- - - %m- -

T ';The provisions of Specification 3.0.4 are not applicable.

SURVf MA3E REQUIREMENTS 4.4.4.1 in addition to the requirements of Specificatjon 4.0.5, each PORV i s ha l l be d emo n s trats4,OPGA9tD a tNe a st4ii~Ce7er' Web n thh erformance of a CHANNEL CALIBRATI Ng o { 4h g,,4 g}.;,n ins W ,q, d @on ,

x ~ r~

4.4.4.2 Each block vat _ve shall be demonsj_tated OPERABLE at least once per 92 the days blockby operating valve is close the

-w.tn ques,th'roufh'bhefoApetecycleoffulltravelunless powe W ooved-i orcer to meet the requirements of ACTION D. or c. in Sp cification 3.4.4.

~~

W "With all RCS cold leg temperatures above'368'F. j

~

CALLAWAY - UNIT 1 3/4 4-10 -

- n - - , , , ,- - ,y-- , - -- --

9 IllSERT A

d. With one or both block valves inoperable, within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> restore the block valve (s) to OPEllAHLE status or place its associated PORV(s) in manuul control. Restore at least one block valve to OPERADLE status within the next i

hour if both valves are inoperablos restore any remaining inoperable block valve to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />; otherwise, be in at least llOT STA!1DBY 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 !!OT SilUTDOW11 within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

REACTOR C00 LAM SYSTEM REVISION 3 OVERPRESSURE PROTECTION SYSTEMS _

LIMITING CONDITION FOR OPERATICN .

.s - .-

,_s, .  %-- v gg X l 3.4.9.3 At least one of the following IOverpressure Protection fystems shall l be OPERABLEr wv n Reuhr c..hn t dv s W rn ut0 is nd Ac nt%s:yec65ven*4 m6%

.nv.csvem a 3<ta c 4%n er <p u 4 1 Sgar s i -

i

a. Two residual heat removal (RHR) suction relief valves each with a i etpoin 450 ps .1 3%, o r

_ _ _ _ _ . v__f  !

b. Two power-operated relief valves (PORVs) with Setpoints which do not

-v% excee,d g the limit

, v~~ est,ablished - ~ ~ in Figure 3.4-4, or c.1the-Reactor-Ceciant-System-(RC+)-depretsurired-with-trHOS-verre of- j yreate-than-egi-te 2 squar+ 4achab ~ . '

.w r w w. n..~... ~-w-.. ,_

APPLICABILITY: MODE 3 when the temperature of any RCS cold leg is less chan ~'

or equa g A08'E p M00ES 4 and_5cand_H0_0_E_6 s with the reactor vessel _byad on -l

. FACTION:, ",( , * '

'[,') k'[,l',C'((' ,,, dE tr PIy5tt Irdf_M4 Am"D y a. With4es: than twoJfCRVswNwo-MR4ustiersre44e f--v 4v e s-op erabl e ,

44tt4P restore twoWRV6-e4,we-RHR-tWe%49ft-eel 4ef-+alves to OPERABLE -

s status within 7 days or depressurize and vent the RCQhyeygtt-e__

xN<,,,c,% h -leatt-a 2 square,jtet-vent, within the next 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> s, wi% aa m vsd e W@ 3essner w o . g ".1 h F With bottt Vs-end-beth M :4stion-r411ef-v41ms inoberable Ni.) depressu ze and vent the RCSgthrn;hAljad-4.l_d'vate

-vent within 8J1ours. amhMiMabJg' r Na orip al A sq ind 6 w G ,. p.JTTJ_e cfn ss o, e gr e e d..n hmD g f

gag ( In the event #the PORVr, or the khR suction relief valves, or the

~~RCS vent (s) are used to mitigate an RCS pressure transient, a I -

Special Report shall be prepared and submitted to the Commission

\ pursuant to SpecificLtion 6.9.2 within 30 days. The report shall describe the circumstantes initiating the transient, the effect of V the PORVs, or the RHR suction relief valves, or RCS vent (s) on the transient, and any corrective action necessary to prevent recurrence.

(c _

The provisions of Specivication 3.0.4 are not applicable.

J 7

_ - + -~-~~ A - n _/- y-

-~ ~ .

CALLAWAY - UNIT 1 3/4 4-34 i

N e , e * ,* ._

+ ..y -,-- . , . . , ,-e.w= -.-,,aer--- - . - , - - -- r - += e

. _. . . , . .. _ . _____...__._.__._...- ___._.-., _ _ ._._._ _ .______~ .._._.

t

./

i.

t I

INSERT B ono RilR suction rolief valvo and ono PORV with cotpoints an decribed above.

6 i

?

5 5

t 5

i L

i i .

l E

b 5

l l t' l

h b

l t r -- 6 l

l 6

'9 N1 # $4WT'W"M' v r 'ew*4wMweerTMve 6+rwww w .qg g wy.yp-pee 4gpp r s myy ,4,

___._ . _ _ _ _ _ _ _3 I

1 i

i t

IllSERT C l

b. With ono of the two required ovorproonure protection  !

dovices inoperable in MODES S or 6, restora two over-  !

pressuro protection devices to OPERABLE status within  !

24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or depressurize and vont the ROS with an RCS i vont of greater than or equal to 2 square inches within the next 8 hourn. i t

A 1

h L

t i

i l

F l

i K

I I

-, y y- , #---e, e v . A .,--,+fyw,, r~-- w-,,r,re,------..www,,'w- , ,--+-=-v-~~4-*--+#*+----- ..e-------e--e-+we------~,-+** .--- . - - +- - - - - - - * - + - - - - -+ + - - *+-- - + -

4 o - .

i .

(

REACTOR COOLAUT SYSTEM I

SURVE!LLANCE RE001REZEffTS ,

4.4.9.3.1 Each PORV shall be demonstrated OPERABLE by:

I a. Performance of an ANALOG CHANNEt. OPERATIONAL TEST on the PORY actuation thannel, but excluding valve operation, within 31 days prior to antering a condition in which the PORV is required OPERABLE and at least once per 31 days thereafter when the PORV

'is required OPERABLE; l~ b. Performance of a CHANNEL CALIBRATION on the PORV sctuation channel at least once per la months; and

c. Verifyirg the PORV isolation valve is ven at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> wnen the PORV is being used for overpressure protection, k

- 4.4.9.3.2 Each RHR suction relief valve shall be demonstrcted OPERABLE c

when the RHR suction relief valves are being used for cold overpressure protection as follows:

5

{ a. For RHR suction relief valve 87088:

t. ( By verifying at least once n ' 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> that RHR RCS suction l_ \

isolation valves (RRSIV) E)-HV-8701B and B3-PV-8702B are open.

i, . For RHR suction relief valve 8708A:

! By verifying at 10sst once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> that RRSIV EJ-HV-8701A and BB-PV 8702A are open.

l injgJ g{suant to l eci,,fJcajf Qi 4.4.9.3.-3 The 902 ;;nt(O h a44 -be-vee 444ed-+04*c4per. 44-4 east-eeee-f e*

hours *-when-the-ven444h',54e4ng.-us+4 for-overpr-eswr-e-pr.otect4on, ,,

i Iu t ..s.T p

__A __ #

-m Ge%-

-2E* sept-when-4he-v ec ;: t'< y i; p ov ided* 44ha-ve4*e-wh+eh i s 10 eke &.

--S ea4ed, o r O th erw4+t-seeeee44n-the-open-p w+t4en r -then--verify--thest

-vehee-eyen-a+4ees t : ::-pec-44-deyev _s q

,, . . , _ , _yx. - -

CALLAWAY - UNIT 1 3/4 4-35 Atnend. ment No. 42

_ . . _ , . . _ . _ . . - -_. __.. ._ _ . . _ . _ . . .~. . _ . . . . - ~._ ._. _ .. _._ . _ _ ___.m..__._._.-._..

t t

+

INSERT D '

With the RCS vented, verify the vont pathway at least enco  ;

por 31 days when the pathway is provided by a valvo(a) that i

-in locked, sonled, or otherwise cocured in the open positions otherwise, verify the vont pathway every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. *

[

4 a

n h

r P

h t

?

9 e

bh - e OP- ww se4 woeT6 )1'--er-a e-T- % ~r- Fn.: ------ m e w up ap6 -+g- gr % Pf' Meip -ti- *Twtf 9 -w ,,.ty--9 r- 94--'- =g'-e'n'*?F""?  ?':'~ $?t***---*--rr''

..-...-.-.: L--. . .. :: - .. . = - :. J. =. h - -. = C:L: = =

• REVIStoy y ,

REACIOR C00LANI SYSTEM

, BASES 3/4.4.2 SAFETV VALVES The pressurize

• Code safet/ va' c: operate to prevent the RG from being pressurized above its Safety timit at 2735 psig. Each safety valve is designed i to relieve 420,000 lbs per hour of s;turated steam. The relief capacity of a single safety valve is adequate to relieve any overpressure condition which could occur during shutdown, in the event that no safety valves are OPERABLE, an operating RHR loop, connected to the RCS, provides overpressure relief capability and will prevent RCS overpressurization. In addition, the Over-pressure Protection System provides a diverse means of protection against RCS overpressurization at low temperatures.

During operation, all pressurizer Code safety valves nust be OPERABLE to prevent the RCS from being pressurized above its Safety Limit of 2735 psig. g$

The combined relief capacity of all of these valves is greater than the maximum ~

surge rate resulting from a complete loss-of-load assuming no Reactor tri? ,,

and also assuming no operation of the power-operated relief valves or steim dump valves.

Demonstration of the safety valvet' lif t settings will occur only during shutdown and will be performed in acco,sance witn the provisions of Section XI of the ASME Boiler and Pressure Code.

3/4.4.3 PRESSURIZER The 12-hour periodic surveillance is sufficient to ensure that the para-meter is restored to within its limit following expected transient operation.

The maximum water volume also ensures that a steam bubble is formed ano thus the RCS is not a hydraulically solid system. The reoufrement that a miniaum r number of pressurizer heaters be OPERABLE enhances the capability of the plant l m)0..contyo1 Reactor 3alant System pressure _and establis,h natural ci_rcul_atjon,_,.

3/,4.4.4 RELM' VALVES g A. , , g ,. 7  % ,4 r a ,. 4 r lhe power-operated relief valves (PORVs) and steam bubble function to relieve HC5 pressurer during all design transients up to and including the design step load decrease with steam dump. Operation of the PORVs minimizes the undesirable opening of the spring-loaded pressurizer Code safety valves.

lach P0HV has a remotely operated block valve to provide a positive shutoff canability should a relief valve become inoperable.

~

f e

]

," ^ ~~~

, /%-

CALLAWAY - UNil 1 B 3/4 4-2

I INSERT E The-PORVs are equipped with automatic actuation circuitry

-and manual control capability.- Because no credit for auto-matic operation is taken in the FSAR analyses for MODE 1,_2 and 3 transients where operation of the PORVs has a beneficial impact on the results of-the analysis, the PORVs are considered OPERABLE in either the manual or automatic-mode. -The automatic mode is the-preferred configuration, as this provides pressure relieving capability without reliance

-_orr operator- action._ ,

9 O

A

• e I .

REACTOR COOLANT SYSTEM BASES HEATUP (Continued)

The use of the composite curve is necessary to set conservative heatup limitations because it is possible for conditions to exist such that over the course of the heatup ramp the controlling condition switches from the inside to the outside and the pressure limit must at all times be based on analysis of the most critical criterion.

Finally, the composite curves for the heatup rate data and the cooldown rate data are adjusted for possible errors in the pressure and temperature sensing instruments by the values indicated on the respective curves. ,

Although the pressurizer operates in temperature ranges above those for

- which there is reason for concern of nonductile f ailure, operating limits are provided to assure compA i performed in accordanrfvsitth(ikili.ty-dpe.tn.icqM,;tLfbLf.itigjge

~

the ASME Code recuirementL_. analysis (one u.a a, s 4.n r w d m a o ne o nt T_o R V ;

,wo RHR suction relief valves, or n RCS vent The OPERABILITY opening of at le st of two PORVs 2 square fr q(hes ensures that the RCS will be p otected from pressure transien u nich could exceed the limits of Appendix G

• 10 CFR

)

s f Part 50 when one or more okne RCS cold legs are less than for. ai to 368*F.

Either PORV or either RHR suctiBUeTlef RTveTIa'E@ne~ relieving capabil-ity to proter.t the RCS from overprc suri:ation when the transient is limited to either: (1) the start of an idle RCP with the secondary water temperature c of the steam generator less than or equal to 50*F above the RCS cold leg temperatures, or (2) the start of a centrifugal charging pump and its injection into a water-solid RCS.

In addition to opening RCS vents to meet the requirement of Specifica- .

tion 3.4.9.3c. , it is acceptable to remove a pressurizer Code safety valve, open a PORV block valve and remove power from the valve operator in conjunction

, - with disassembly of a PORV and removal of its internals, or otherwise open :ne .

RCS.

COLD OVERPRESSURE The Maximum Allowed PORY Setpoint for the Cold Overpressure Mitigation System (COMS) is derived by analy is which mcdels the performance of the COMS assuming various mass input and heat input transients. Operation with a PCRV .

setpoint less than or equal to the maximum setooint ensures tnat Appendix G .

criteria will not be violated with consideration for 1) a maximum pressure oversnoot beyond the PORV setooint which can occur as a result of time celays in signal processing and valve opening; 2) a 50*F neat transport effect mad;

)

CALLAWAY - UNIT 1 B 3/4 a-15 Amendment No. 42