_. _

i

. o |

EMERGENCY PROCEDURE3EA.,ND GULF NUCLEAR STATION,

G PLANT OPERATICNS MANUAL.

Volume 5 0 5- S-01-EP-2

Sec'tien 1 Revision C

Date:

EMERGENCY PROCEDURE .

- COOLDOWN,

SAFETY RELATED

DatePrepared:' ''

Reviewed: DateTechnical Review

- ' ' DateReviewed':Cperat:.cns Superintendent

DateReviewed: '' ' '

Nuclear Plant Quality Superintendent

'

Approved: Date'

Assistant Plant Manager

PSRC: DateIi

)l'

List of Effective Pages:

Pace: Revisien:

1-7 Rev. 'C

Attachment I Rev. C .

810.4210409

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

. .

GP.AND GULF NUCLEAR STATICM EMERGENCY PRCCEDURE,

i_ _

TITLE: Cooldown NO . 0 5-S-01-EP-2 REV . O PAGE1 of

.

1.0 PURPOSE

.The purpose of this procedure is to depressurize and cooldown theRPV to cold shutdown conditions while maintaining RPV water levelwithin a satisf actory range.

2.0 ENTRY CONDITIONS

This procedure is entered frcm EP-1 (Level Control) after the RPVwater level has been stabilized.

.

3.0 OPERATOR ACTIONS

' CAUTION

A LPCS and LPCI injection resulting from a A1.75 psigDrywell pressure signal will inject a large volumeof water into the RPV when RPV pressure decreasesto the LPCS and LPCI pump injection pressures. Rapidinjection of this large volume of water may be detri-mental to maintaining RPV water level within thedesired range.

-

:

' NOTEr

I SOI numbers acd available pressure ranges are indicatedfor each system,

sNOTE

i The systems listed in paragraph 3.1 are listed in. orderi of expected availability and ease of utilization. ' The

choice of using the following systems may vary withplant conditions. It is preferred that the minimumof systems be used to accomplish the water levelrestoration.

[[7 3.1 Maintain RPV water level between -52" and the TAF, as follows:

' NOTE

TAF = 0" as read en the following fuel zone instrumentation:

P601 - RHR Section - B21-R615

P601 - RCIC Section - B21-R610

[[7 3.1.1 Use the following systems :

[]7 a. Feedwater (04-1-01-N21-1) (1103 - O psig)

[[7 b. CRD ( 0 4 -1-01-C11-1) (1103 - O psig)

(1) Operate two pumps if possible... ..

-- . - - ..w -w - - . . -

. .

GPJdiD GUL7 NUCLEAR STATION EMERGENCY PROCEDURIl_| TITLE * Cooldown NO.Q5-S-Ql-EP-2 REV . C PAGE 2 of 7

NOT2

RCIC cperation results in Suppression Pool heating..

f]7 c. RCIC (04-1-01-E51-1) (1103 - 50 psig)

' NOTE

Maintain a minimum of 2000 RPM to ensure sufficientoil pressure by placing the RCIC FLOW CONTROLLER toMANUALand adjusting RPM.

.

-.

CAUTION

Do not place an ECCS in the MANUAL mode unless, bytwo independenu indications :

.

1. misoperaticn in the AUTOMATIC mode is con-firmed, or

2. adequate core' cooling is assured.

-

z[7 d. uPCS ( 0 4 -1-01-E 22-1) (1103 - O psig)

[[7 e. LPCS ( 0 4 -1-01-E21-1) (500 - O psig)

4[7 f. Consensate sooster(04-1-01-N19-1) (435 - O psig)

,

|

| f[7 g. Condensate (04-1-01-N19-1) (270 - O psig)i

ZI7I

h. LPCI ( 0 4-1-01-E12 -1) (310 - O psig)_ , , ,,_

z[7 3.1.2 If while decressurizing, s high drywell pressure (1.75 psig)exists and LPCS or LPCI pump (s) are not required to assureadequate core cooling; then prevent injection from LPCS and/or LPCI by closing the injection valve (s) .

4]7 a. LPCI toop A - E12 - r042A

[[7 b. LPCI Loop 3 - E12 - F0423

| 27 c. LPCI Leop C - E12 - r042C

/7 d. LPCS - E21 - F005A~

i-

I

O 3.1.3 If an ECCS system has been placed in the FANLAL mode, thenf

all of the following actions are required:

a. Be aware that the system will not automatical,1yinitiate,

b

g- ey- -w w w -

. .

GRAND GULF NUCLEAR STATION -DIERGENCY PROCEDURE

@ ;ng: Cooldown NO 0 5-S-01-EP-2 agy , C pag 3 3 af 7

.

' [[7 b. Make frequent checks of the initiating orcontrolling parameter.

O c. When the MANUAL mode is no longer required,restore the system to the AUTCMATIC/STANCBYmode if possible ,

f[7 3.1.4 I# high Suppressicn Pool water level (18 ' 10 ") or lowcondensate Storage Tank level (2'0") occurs, perform

,

the following:.

' '

2:7 a. Confirm automatic transfer of HPCS and RCIC suctionsfrom the Condensate Storage Tank to the SuppressionPool.

) (1) HPCS - E22 - F015 opens and then E22 - F001' closet

(2) RCIC - E51 - F031 opens and then E51 - F010 closer~

/7 b. If the HPCS and RCIC suctions did not automaticallytransfer as designed, then manually transfer the HPCSand RCIC suctions in the sequence listed in substep a.

/~7 3.1.5 If RPV water leve'l cannot be determined or m$intained--

above TAF, proceed to EP-4 (Level Restoration) .

NOTE

~TAF = 0" as read on the following fuel zone instrumentation:

P601 - RHR Section - B21-R615

, P601 - RCIC Section - B21-R610 '

I

f_/ 3.2 If SRV's are cycling, manually open one SRV and. reduce RPVpressure to approximately 833 psig (150 psig below the lowestSRV lif t pressure of 1033 psig af ter low low set is actuated) .

!

[[7 3.3 Depressurize the RPV and maintain cooldown rate below 100 F/hr,as follows:

NOTE.

In order to (1) conserve RPV water inventory, (2) protect containmenti integrity, and (3) limit radioactive release to the environment, cool-

down rates greater than 1000F/hr may be required.

NOTE

The systems listed in steps 3.3.1.a and 3.3.1.b are listed in order ofexpect effectiveness and availability. The minimum number of systems

.u.

i

. .

GPJ2;D GUIS NUC' EAR STATION EMERGENC7 PRCCIDURE,

.e

! TITLE: Cooldown NO . 0 5 -S-01-EP-2 REV.C PAGE 4 cf 7if

~

NOTE con't

used will make the centrol of the RPV cooldewn rate easier to acccm-plish.

--/7 3.3.1 Use the minimum nunber of the following systems to-

0maintain the RPV cooldown rate less than 100 F/hr.

z7-

Main Condenser availablea.

2:7(1) Main Turbine Bypass Valves (preferred methodi(1103 - O psig)

.

'

NOTE

RCIC operation results in Suppression Pool heating.

[[7(2) RCIC (0 4-1-01-E51-1 at step later) (1103 - O psig)

.

- NOTE

Maintain a minimum cf 2000 RPV to ensure sufficient oil pressureby placing the RCIC FLCW CONTROLLER to MANUAL and adj usting RPM.

(a) Mai.ntain greater than 50 psig RPVpressure unless motor driven pumpssufficient to maintain RPV level arerunning and available for injection

- as determined by the folicwing sequence :''

l. Observe RPV water levelindication to determineindicated level.

2. Close RCIC injection valveE51-F013.

.

3. Observe RPV water level'and attemptto maintain RPV water level with the motedriver injection pumps which are running.

4. If RPV water level cannot be maintainedwith the RCIC injection valve E51-F013closed, then open E51-F013.

5. If RPV water level can be maintainedwith the RCIC injection valve E51-F013closed, then RCIC can be shutdown and theRPV pressure can be decreased to lessthan 50 psig.

c_,

. .

GRAND . GULF NUCLEAR STATICN EMERGENCY PROCEOUP.E

UITLE: Cooldown NO. 05-3-01-EP-2 REV C PAGE 5 of 7!

.

[[7 (3) RnR (Steam Condensing Mode) (04-1-01-E12-1 at- step later) (110 3 - O psig)

~/ 7 (4) Steam Seal Generator (04-1-01-N33-1 at step~~

1ater) (1103 - 150 psig)

z:7 (5) Off Gas Preheaters (04-1-01-N64-4) (1103 - 200 ps:

[[7(6) SJAE's (04-1-01-N62-1) (1103 - 200 psig)'

. /[7 (7) REPT's (04-1-01-N21-1) (1103 - 350 psig)

z 7 (8) RwCU (recirculation mode) ( 0 4-1-01-G 3 3-1)-

(1103 - O psig)

f[7 (9) Main Steam Line Drains (04-1-01-Nil-2)(1103 - O psig)

f /(10) RNCU (blowdown mode) ( 0 4 -1-01-G 3 3-1) (1103 - O ps:-

f[7 b. Main Condenser not available

NOTEi

_

; RCIC operation results in Suppression Pool heating,il

| f[7(1) RCIC (04-1-01-E51-1 at step later) (1103 - O psig)_

,

NOTE1 --

|

| Maintain a mintnum of 2000 RPM to ensure sufficient o,il pressure! by placing the RCIC FLCW CONTROLLER to MANUAL and adjusting RPM.i

(a) Maintain greater than 50 psig RPV pressureunless motor driven pumps s'ufficient to main-tain RPV level are running and availablefor injection as determined by the followingsequence:

1 Observe RPV water level indicationto determine indicated level.

2. Close RCIC injection valve E51-F013.

3. Observe RPV water level and attemptto maintain RPV water '.evel with the

'

motor driven injection pumps which arerunning.

4. If RPV water level cannot be maintained,with the RCIC injection valve E51-F013.;

closed, then open E51-F013.

1

. .

GRAND GUI.F NUCI. EAR STATION EMERGENCY PROCEDUREI

EITI.E : Cooldown NO . 0 5-S-01-EP-2 REV.C PAGE 6 cf 7

.

5. If RP'J water level can be maintained wit!Eie RCIC injection valve E51-F013 closedthen RCIC can be shutdown and the RPVpressure can be decreased to less than50 psig.

-/7 (2) RER (Steam Condensing Mode) (0 4-1-01-E12-1 atstep later) (1103 - O psig)

/7 (3) RWCU (Recirculation Mode) (04-1-01-G33-1 at step~ ~ ~ iater) (1103 psig - 0<psig)

'

NOTE

Fewer blowdowns with increar'd pressure reductions are desirableto minimize SRV cycle stresses .

O (4) SRV's (04-1-01-B21-1 at step later) (1103 - O psic

(a) Ea.ch SRV actuation should be selected toequalize Suppression Pool heating, usingFigure A.:as a guide .

(b) If the continuous SRV pneumatic supply isor becomes unavailable, depressurize withsustained SRV openingu

FCS*.D00 r0474

r0433344 !60 F041E

F04LD t-

328~FOSIA%

F04fD D=CJtEEN A-RED 48'311 g

r041AC M EN 0 -m ,P

F0 4}It. g289

r087L i

'""gy Dm .=,

F041r A 7041G254' C-BLUg 104*

F04737051r 1200

0-ftrD C-MD F051*F0413 1363

41000

3

- ADS VALVE 3

Se letter folloind by a celer destenates the een color ensuppresston pooi terrerature recorcers M71-aC4SA, S. C, D,on panel 1H13-9970.

FIGURE A

O (5) RWCU (blowdown mode) (04-1-01-G33-1 at stepu la ter) (1103 - O psig).

. _ . . _ - .

..

GRAND .GUII NUCI. EAR STATICN ZMERGINCY PRCCIOURE

ult'I : Cooldown NO. 05-5-01-EP-2 REV. C PAGE 7 of 7-.

I

.

O 3.3.2 When the RHR shutdown cooling interlocks clear as indicate-by RPV pressure less than 125 psig, then initiate theshutdown cooling mode of RER per 04-1-01-E12-1 ac paragrapi5.4.

'7 3.3.3 f the RER shutdown cooling mode cannot be established_ _I_f,d further cooldown is required, then continue to cooldow:an

with the systems listed in substep 3.3.1.a or 3.3.1.bas applicable.

I_f, RPV cooldown beyond'that which can be accomplished byL7_ 3.3.4 f

depressurization is required, then enter EP-8 (AlternateShutdown Cooling).

'

/7 3.3.5 If the RPV cocidcwn is under control and the plant condi-,yion ;is stable , proceed to cold shutdown in accordancewith IOI 03-1-01-3.

.

.

%

|

I

I

i ',

I

lI

6

.M,

e

. . - ,

. .

OO58

eb kr. ws.ww.z ; we c |-

|F * < '" * '> rs es s'. -=% i

, _,

i @:.v-O-s

G.iER- P00R ORIGINAL'

, SAu ne %

,

.. .

i Ag %-<

3 '.. e p .'.O.f .

i

[,- - ~.3.'

*,.

n.. | NJOt~.*.'.X CN L'iMEL ( A.:- G"i |, &*j..P,. ..m o . s.*

. sM ;,., - 'cmus.;.. t.les=2 ::::v h-C1-0 mi;U

:<s'

~--L.. .

CS.'O C5-0 M,

gj-m __-._ _._.__________.c.m.mts w..u .

E- \.90A (Sr.o 5'S t .

#~ C4l 60 - O ?"_'d4.-s~-

_--

e

,+.}w ;

c

*a s. *** .~. M .\ d h*" 6 4 w.

*J ;; =J.ac

.g%.g, 7N *n. DE" ,,

.J' ' """

== W.,.I b(MIk,

""'%.r -- ' ' '' " "* ~4M 'O"'"' "- '2.*

5s s c1 de%8KO WOf.UMT.a 'h% 4

~~

voc y,

/,6''

J. COut:.)d5".c ,

, %., _v s A. ai T*',;.

V^ -

g ,

w'w:- W L9.0 2. 3 4"".. , . . -

|'- 9 .3 'd ; -'

4

|3r.: w. 4 4. - \(IAMWJ1C d#_N yo.*~ *| 51L;..'. '. - '"ua%> (!fVs Qgg. -

[ y T,i.' R e. s e.,, ,

.v.. , P.*i f f * 4 ==. f.e d f } Nk% Dk e M S.*

| #I*[M#- f: r/#

.

SS.'l,5-' Yjs; os pronarar:| Rp.y?-- D C C.-, ""

,.

| . '. Ch i St.'4 2 ii:.W w.~gi m _ ise _=s=.. * ~'q * *, m.- '~i 4I ""a

l ", L .cg ,I '"h in;:s= s u ""- d ra; :'

1 cveuwwsJ .' |

| | :.. :,

\ ~ . g -|

|I

| 4_-J ' ex cac.V

s. m|h~ ay.

w.~ -

'.r.noC.C=.::.cmihyC.C C.%.S*-

: gt-- f t g( '.JiE:4! * * ' '

P*

%,.G. X-*:sN 4 .- * 1%C :.:"".S

.

i .. u. em e._ m a en. a eu|C cos su t

C.'.R N%* eccuM

.__ = . . .

t.:.T. G.'uc MO

%o

e

M% % M** Peccces pocgg0 t'AT- fE%.~I.".'* -LL~1.ETb

' l.h L, ,. k b,,_v r. a-_ g g gag jw =a m os;

i W 0- 1.N i i W _ n c._ /- -

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