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'' E. J. Mroc2 1-1-85 | |||
. Fora Approved by Station Superintendent Effective Onte l STATION PROCEDURE COVER SHEET | |||
/N 1 | |||
h A. IDENTIFICATION Number E0P 35 ES-0.3 Rev. 1 l Title NATURAL CIRCULATION C00LOOWN WITH STEAM VOID IN VESSEL (WITH RVLMS) | |||
Prepared By H. K. COVIN , | |||
B. REVIEW 1 have reviewed the above procedure and have found it to be satisfactory. | |||
l TITLE SIGNATURE DATE DEPARTMENT HEAD l | |||
l C. UNREVIEWED SAFETY QUESTION EVALVATION DOCUMENTATION REQUIRED: | |||
(Significant change in procedure method or scope YES [ ] NO [ ] | |||
I as described in FSAR) l (if yes, document in PORC/SORC meeting minutes) | |||
ENVIRONMENTAL IMPACT (Adverse environmental impact) YES [ ] NO [ ] | |||
(if yes, document in PORC/50RC meeting minutes) | |||
D. INTEGRATED SAFETY REVIEW REQUIRED (Affects res* .se of Safety Systems, performance YES [ ] NO [ ] | |||
of safety- . sated control systems or performance of control systems which may indirectly affect safety system response.) | |||
(If yes, document in PORC/50RC meeting minutes.) | |||
l E. PROCEDURE REQUIRES (h30RC REVIEW YES N NO [ ] | |||
F. (ORC /SORC APPROVAL . | |||
h/50RCMeetingNumber 3*b7'*2dl G. APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below: | |||
' Y Q A Station /5ergice/ Unit Superint#iident Effective Date SF 301 N'V- 7 8810260219 801007 Page 1 of 1 PDR ADOCK 05000213 P PDR l | |||
t | |||
! I i . | |||
1 1 | |||
E0P 35 ES-0,3 Page 1 ; | |||
l , | |||
Rev 1 ,l j | |||
i i' i | |||
i NATURAL CIRCULATION COOLDOWN WITH STEAM V010 IN VESSEL (WITH RVLMS) | |||
( | |||
j | |||
, i-j Pace No. Eff. Rev. | |||
t 1-7 1 J l | |||
i i | |||
O . | |||
k l | |||
l l | |||
I I | |||
l' I l | |||
l l | |||
O : | |||
:l | |||
,1 | |||
* NATURAL CIRCULATION COOLDOWN WITH E0P 35 ES-0.3 Page 2 l STEAM VOID IN VESSEL (WIT;I RVLMS) Rev. 1 $ | |||
f a | |||
[ | |||
:) | |||
o A. PURPOSE i | |||
i This procedure provides actions to continue plant cooldown and depressurization to cold shutdown, with no accident in progress, under conditions that allow for the potential formation of a void- l | |||
' in the upper head region with a vessel level system available to l monitor void growth. l J i B. ENTRY CONDITIONS j This procedure is entered from E0P 35 ES-0.2, NATURAL CIRCULATION j C00LDOWN, after completing the first eleven steps. i r | |||
l This procedure was written for Modes 1, 2 and 3 near no load : | |||
i conditions. Using this procedure when not in these modes ! | |||
l requires a step by step evaluation to determine if the required I | |||
! action is still applicable to current plant conditions. { | |||
U l i | |||
f | |||
; i | |||
) | |||
i i | |||
j l | |||
l 2 | |||
I I | |||
l' b | |||
i i | |||
l l | |||
l VPK44 2 1943 i | |||
. NATURAL CIRCULATION C00LDOWN W11H E0P 35 ES-0.3 Page 3 STEAM VOID IN VESSEL (WITH RVLMS) Rev. 1 : | |||
s , | |||
\s / i | |||
-- g?IP ACTH)NitXPECTED RESPONSE RESPONSE NOT OSTMNED CAUTION | |||
, 1. If SI actuation occurs during this procedure ECP 35 E-0, REACTOR TRIP OR SATETY INJECTION, should be performed. | |||
: 2. The first eleven steps of E0P 35 ES-0.2, NATURAL CIRCULATION - | |||
COOLDOWN should be performed before continuing with this procedure. | |||
. NOTE | |||
: 1. Foldout page should be open. | |||
: 2. RCPs should be run in order of priority (2,1. THEN 3 or 4) to provide normai PZR spray. | |||
: 3. If conditions can be established for starting an RCP during this procedure Step 1 should be repeated. | |||
: 4. If the computer is not available to measure core exit TCs, manually measure TCs. | |||
( | |||
: 5. If auxiliary spray is required during procedure performance, maintain spray flow and throttle charging flow as necessary for proper plant control. | |||
1 Try to Restart an RCP | |||
: a. Establish conditions for a. Go to Step 2. | |||
starting an 9CP, per OP 3301D, RCP OPERATION | |||
: b. Check RVLMS head Icvel b. Perform the following AED plenam level -- 100% | |||
: 1) Increase PZR level to approximately 90% | |||
using charging and letdown. | |||
i | |||
: 2) Establish subcooling , | |||
> 70*F by dumping steam to atmosphere t | |||
: c. Start one RCP c. Go to Step 2. | |||
l d. Go to OP 3208. PLANT l C00LD0kN CFkes-1 3 44 | |||
1 | |||
* i NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 4 ' | |||
STEAM VOID IN VESSEL (WITH RVLMS) Rev. 1 STEP ACTIONIEXPECTED RESPONSE RESPONSE NOT OBTAINiQ l | |||
NOTE f | |||
Saturated conditions in the P7R should be established before trying to decrease PZR level. | |||
2 Establish PZR Level To Accommodate Void Growth a Place PZH level controls in manual | |||
: b. Check PZR level - b. Control charging and BET %IEN 20% AND 30% letdown as necessary. | |||
3 Continue RCS Cooldown And Initiate Depressurization | |||
: a. Maintain cooldown rat.e in RCS cold legs - | |||
< 100*T/HR | |||
: b. Maintain RCS subcooling (j | |||
xs hased on core exit TCs - | |||
> 50*r | |||
: c. Maintain RCS temperature I and pressure to the right ' | |||
of the 60*F/HR curve on Tech Spec figure 3.4-3 i RCS COOLDOWN LIMITATIONS ; | |||
: d. Check letdown - IN SERVICE d. Depressurize RCS using one PZR PORV. Go to Step 4. | |||
5 | |||
: e. Depressurire RCS using auxiliary spray O | |||
0 % Va-1 3 44 | |||
NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 5 STEAM VOID IN VESSEL (WIT}l RVLMS) Rev. 1 0 -- | |||
STEP ACTHM0tXPECTED RESPONlt RESPONlt NOT QBTAINED NOTE With a steam void in the vessel head, decreasing PZR pressure will cause the void to expand and PZR level to increase. | |||
4 Control PZR Level | |||
: a. Level - > 20% a. Control charging and . | |||
letdown, as necessary, to increase PZR level to > | |||
20%. | |||
: b. Level - < 90% b. Perform the following | |||
: 1) Turn on PZR heaters to maintain PZR pressure stable. | |||
: 2) Decrease PZR level to | |||
< 90% by one of the following a) Control charging and letdown as necessary. | |||
- OR - | |||
b) Continue cooldown to shrink RCS inventory, 5 Check RVLMS plenum level Repressurize RCS to maintain GREATER TilAN OR EQUAL TO 82% RVLMS GREATER THAN 82%. | |||
Return to Step 3. | |||
6 Check If S1 Accumulators Should Be Isolated | |||
: 4. Check PZR pressure 4. DO NOT Isolate S! | |||
< 1000 psia Accumulators. Continue with Step 7. Vl(EN requirements met, THEN do Step 6b. | |||
: b. Close the St Accumulator b. IF any accumulators Isolation valves and OPEN cannot be isolated THEN | |||
'' Accumulator Isolation vent off pressure from x_- motor supply breakers appropriate unisolated accumulators CPN661 S S4 | |||
NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 6 STEAM VOID IN VESSEL (k'ITH RVLMS) Rev. 1 i | |||
%) | |||
STEP ACTION. EXPECTED RESPONSE RESPON$t NOT OBTAINED 7 Maintain Letdown Flow | |||
: a. Open letdown orifice isolatier. valves as necessary | |||
: b. Adjust low pressure letdown control valve setpoint as necessary 8 Maintain RCP Seal Injection Flow between 8 to 13 spm 9 Check if RHR System Can Be Placed in Service | |||
: a. RCS temperature - a. Return to Step 3. | |||
< 350*F | |||
: b. RCS pressure - b. Return to Step 3. ' | |||
< 390 PSIA | |||
: c. Place RHR System in service | |||
~ as follows: | |||
: 1. OP 3310A, RESIDUAL HEAT REMOVAL SYSTEM | |||
: 2. OP 3208 PLANT COOLDokN | |||
: d. Disable all but one chargint pump and as least one SI pump prior to cooling down to < 350*F | |||
: e. Arm cold overpressure protection system 10 Continue RCS Cooldown To Cold Shutdown O | |||
.m . , . . | |||
e NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 7 STEAM VOID IN VESSEL (WITH RVLMS) Rev. 1 U) | |||
- STEP ACTION,tXPECTED RESPONSE RESPONSE NOT OSTAINED 11 Continue Cooldown Of Inactive Portion of RCS ' | |||
t | |||
: a. Cool upper head region 1. IF the head cannot be , | |||
using CRDM fans cooled by CRDM fans THEN ' | |||
use vessel head vent excess letdown, | |||
: b. Cool SG U-tubes by dumping ; | |||
steam from all SGs [ | |||
: c. RVLMS head and plenum c. Return to Step 10. | |||
level - 100% | |||
CAUTION ! | |||
Depressurizing the RCS before the entire RCS is | |||
< 200*F may result in additional void formati e in the RCS. i O 12 Determine If RCS Depressurization Is Permitted | |||
: a. Entire RCS AND RVLMS a. DO NOT DEPRES5URIZE RCS. | |||
Head T/C's LESS THAN Retur;,to Ctep 10, 200*F | |||
: b. Go to OP 3208, PLANT C00LDOWN FINAL , | |||
e_ , .. | |||
I | |||
-. _ , _ _ _ _ _,}} |
Latest revision as of 07:34, 30 December 2020
Text
_ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ - _ _
E. J. Mroc2 1-1-85
. Fora Approved by Station Superintendent Effective Onte l STATION PROCEDURE COVER SHEET
/N 1
h A. IDENTIFICATION Number E0P 35 ES-0.3 Rev. 1 l Title NATURAL CIRCULATION C00LOOWN WITH STEAM VOID IN VESSEL (WITH RVLMS)
Prepared By H. K. COVIN ,
B. REVIEW 1 have reviewed the above procedure and have found it to be satisfactory.
l TITLE SIGNATURE DATE DEPARTMENT HEAD l
l C. UNREVIEWED SAFETY QUESTION EVALVATION DOCUMENTATION REQUIRED:
(Significant change in procedure method or scope YES [ ] NO [ ]
I as described in FSAR) l (if yes, document in PORC/SORC meeting minutes)
ENVIRONMENTAL IMPACT (Adverse environmental impact) YES [ ] NO [ ]
(if yes, document in PORC/50RC meeting minutes)
D. INTEGRATED SAFETY REVIEW REQUIRED (Affects res* .se of Safety Systems, performance YES [ ] NO [ ]
of safety- . sated control systems or performance of control systems which may indirectly affect safety system response.)
(If yes, document in PORC/50RC meeting minutes.)
l E. PROCEDURE REQUIRES (h30RC REVIEW YES N NO [ ]
F. (ORC /SORC APPROVAL .
h/50RCMeetingNumber 3*b7'*2dl G. APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below:
' Y Q A Station /5ergice/ Unit Superint#iident Effective Date SF 301 N'V- 7 8810260219 801007 Page 1 of 1 PDR ADOCK 05000213 P PDR l
t
! I i .
1 1
E0P 35 ES-0,3 Page 1 ;
l ,
Rev 1 ,l j
i i' i
i NATURAL CIRCULATION COOLDOWN WITH STEAM V010 IN VESSEL (WITH RVLMS)
(
j
, i-j Pace No. Eff. Rev.
t 1-7 1 J l
i i
O .
k l
l l
I I
l' I l
l l
O :
- l
,1
- NATURAL CIRCULATION COOLDOWN WITH E0P 35 ES-0.3 Page 2 l STEAM VOID IN VESSEL (WIT;I RVLMS) Rev. 1 $
f a
[
- )
o A. PURPOSE i
i This procedure provides actions to continue plant cooldown and depressurization to cold shutdown, with no accident in progress, under conditions that allow for the potential formation of a void- l
' in the upper head region with a vessel level system available to l monitor void growth. l J i B. ENTRY CONDITIONS j This procedure is entered from E0P 35 ES-0.2, NATURAL CIRCULATION j C00LDOWN, after completing the first eleven steps. i r
l This procedure was written for Modes 1, 2 and 3 near no load :
i conditions. Using this procedure when not in these modes !
l requires a step by step evaluation to determine if the required I
! action is still applicable to current plant conditions. {
U l i
f
- i
)
i i
j l
l 2
I I
l' b
i i
l l
l VPK44 2 1943 i
. NATURAL CIRCULATION C00LDOWN W11H E0P 35 ES-0.3 Page 3 STEAM VOID IN VESSEL (WITH RVLMS) Rev. 1 :
s ,
\s / i
-- g?IP ACTH)NitXPECTED RESPONSE RESPONSE NOT OSTMNED CAUTION
, 1. If SI actuation occurs during this procedure ECP 35 E-0, REACTOR TRIP OR SATETY INJECTION, should be performed.
- 2. The first eleven steps of E0P 35 ES-0.2, NATURAL CIRCULATION -
COOLDOWN should be performed before continuing with this procedure.
. NOTE
- 1. Foldout page should be open.
- 2. RCPs should be run in order of priority (2,1. THEN 3 or 4) to provide normai PZR spray.
- 3. If conditions can be established for starting an RCP during this procedure Step 1 should be repeated.
(
- 5. If auxiliary spray is required during procedure performance, maintain spray flow and throttle charging flow as necessary for proper plant control.
1 Try to Restart an RCP
- a. Establish conditions for a. Go to Step 2.
starting an 9CP, per OP 3301D, RCP OPERATION
- b. Check RVLMS head Icvel b. Perform the following AED plenam level -- 100%
- 1) Increase PZR level to approximately 90%
using charging and letdown.
i
- 2) Establish subcooling ,
> 70*F by dumping steam to atmosphere t
- c. Start one RCP c. Go to Step 2.
l d. Go to OP 3208. PLANT l C00LD0kN CFkes-1 3 44
1
- i NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 4 '
STEAM VOID IN VESSEL (WITH RVLMS) Rev. 1 STEP ACTIONIEXPECTED RESPONSE RESPONSE NOT OBTAINiQ l
NOTE f
Saturated conditions in the P7R should be established before trying to decrease PZR level.
2 Establish PZR Level To Accommodate Void Growth a Place PZH level controls in manual
- b. Check PZR level - b. Control charging and BET %IEN 20% AND 30% letdown as necessary.
3 Continue RCS Cooldown And Initiate Depressurization
- a. Maintain cooldown rat.e in RCS cold legs -
< 100*T/HR
- b. Maintain RCS subcooling (j
xs hased on core exit TCs -
> 50*r
- c. Maintain RCS temperature I and pressure to the right '
of the 60*F/HR curve on Tech Spec figure 3.4-3 i RCS COOLDOWN LIMITATIONS ;
5
- e. Depressurire RCS using auxiliary spray O
0 % Va-1 3 44
NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 5 STEAM VOID IN VESSEL (WIT}l RVLMS) Rev. 1 0 --
STEP ACTHM0tXPECTED RESPONlt RESPONlt NOT QBTAINED NOTE With a steam void in the vessel head, decreasing PZR pressure will cause the void to expand and PZR level to increase.
4 Control PZR Level
- a. Level - > 20% a. Control charging and .
letdown, as necessary, to increase PZR level to >
20%.
- b. Level - < 90% b. Perform the following
- 1) Turn on PZR heaters to maintain PZR pressure stable.
- 2) Decrease PZR level to
< 90% by one of the following a) Control charging and letdown as necessary.
- OR -
b) Continue cooldown to shrink RCS inventory, 5 Check RVLMS plenum level Repressurize RCS to maintain GREATER TilAN OR EQUAL TO 82% RVLMS GREATER THAN 82%.
Return to Step 3.
6 Check If S1 Accumulators Should Be Isolated
- 4. Check PZR pressure 4. DO NOT Isolate S!
< 1000 psia Accumulators. Continue with Step 7. Vl(EN requirements met, THEN do Step 6b.
- b. Close the St Accumulator b. IF any accumulators Isolation valves and OPEN cannot be isolated THEN
Accumulator Isolation vent off pressure from x_- motor supply breakers appropriate unisolated accumulators CPN661 S S4
NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 6 STEAM VOID IN VESSEL (k'ITH RVLMS) Rev. 1 i
%)
STEP ACTION. EXPECTED RESPONSE RESPON$t NOT OBTAINED 7 Maintain Letdown Flow
- a. Open letdown orifice isolatier. valves as necessary
- b. Adjust low pressure letdown control valve setpoint as necessary 8 Maintain RCP Seal Injection Flow between 8 to 13 spm 9 Check if RHR System Can Be Placed in Service
- a. RCS temperature - a. Return to Step 3.
< 350*F
- b. RCS pressure - b. Return to Step 3. '
< 390 PSIA
- c. Place RHR System in service
~ as follows:
- 1. OP 3310A, RESIDUAL HEAT REMOVAL SYSTEM
- 2. OP 3208 PLANT COOLDokN
- d. Disable all but one chargint pump and as least one SI pump prior to cooling down to < 350*F
- e. Arm cold overpressure protection system 10 Continue RCS Cooldown To Cold Shutdown O
.m . , . .
e NATURAL CIRCULATION C00LDOWN WITH E0P 35 ES-0.3 Page 7 STEAM VOID IN VESSEL (WITH RVLMS) Rev. 1 U)
- STEP ACTION,tXPECTED RESPONSE RESPONSE NOT OSTAINED 11 Continue Cooldown Of Inactive Portion of RCS '
t
- a. Cool upper head region 1. IF the head cannot be ,
using CRDM fans cooled by CRDM fans THEN '
use vessel head vent excess letdown,
- b. Cool SG U-tubes by dumping ;
steam from all SGs [
- c. RVLMS head and plenum c. Return to Step 10.
level - 100%
CAUTION !
Depressurizing the RCS before the entire RCS is
< 200*F may result in additional void formati e in the RCS. i O 12 Determine If RCS Depressurization Is Permitted
Head T/C's LESS THAN Retur;,to Ctep 10, 200*F
- b. Go to OP 3208, PLANT C00LDOWN FINAL ,
e_ , ..
I
-. _ , _ _ _ _ _,