ML20077F861
| ML20077F861 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/06/1983 |
| From: | Boldt G FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML20077F840 | List: |
| References | |
| AP-530, GL-81-21, NUDOCS 8308030092 | |
| Download: ML20077F861 (13) | |
Text
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Document Section g
l-N F O R hfl AT I O N O N L n
C. R. Nuclear U
k NC REV 00 Date 06-03-83 AP-530 NATURAL CIRCULATION ENTRY SYMPTOMS CONDITIONS 1.
No operating RCPs.
Manual trip of RCPs due to ES actuation.
2.
' Annunciator alarms associated with trip of all RCPs.
s I
l Reviewed By PRC Date 06-03-83 Mtg.#
83-22 Approved By N MM Date 7- (, 83
/
l AP-530 Page 1 of 13 NC B308030092 830728 PDR ADOCK 05000302 P
(
NC REV 00 Date 06-03-83 AP-530 ACTIONS IMMEDIATE REMEDIAL 1.
Verify adequate subcooling 1.
Establish full HPI.
ma rgi n:
2.
Start raising OTSGs to 95%
on operating range using RC SUBC00 LING emergency feedwater.
i PRESSURE MARGIN 3.
Refer to AP-380, Engineeered PSIG
'F Safeguards Actuation.
> 1500 20 f 1500 50 e
2.
Start raising OTSG levels to Establish full HPI.
level:
i CONDITION LEVEL e
NO RCPs 50%
e Adequate subcooling ma rgi n e
Less than adequate 95%
subcooling ma rgi n e
< 2 HPI pumps available 95%
NC AP-530 Page 2 of 13
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1 i.
NC REV 00 Date 06-03-83 AP-530 FOLLOW-UP ACTIONS DETAILS 1.
Start VP-580 Start Plant Safety Verification Procedure.
AND notify SOTA.
CAUTION Cooldown of RC shall not exceed the following rates:
Tc (*F)
RATE (*F/HR) 550 - 280*
10.0 280 - 150 5.0
< 150 2.5 2.
Establish required OTSG i
levels CONDITION LEVEL AND maintain PZR level > 50".
e Adaquate subcooling margin 50%
e Less than adequate subcooling margin 95%
e
< 2 HPI pumps available 95%
i NC AP-530 Page 3 of 13
i i
k NC REV 00 Date 06-03-83 AP-530 FOLLOW-UP (Cont'd)
ACTIONS DETAILS NOTE AP-450. Emergency Feedwater Actuation, contains EFW throttling rules.
3.
IF[ emergency feedwater is
- used, i
THEN refer to AP-450, T5ergency Feedwater Actuation.
NOTE s
Rapid and possibly.irratic increase in PZR level without change in RC make up, RC letdown, OTSG feed rate or OTSG steaming rate is indication of RC void.
4.
WHEN RC voids are indicated, Reduce RC void volume:
THEN:
a.
Reduce RC void volume a.
Stop depressurization b.
Maintain RC TEMP and b.
Stabilize RC temperature PRESS until void indication does NOT exist.
c.
Raise RC PRESS d.
Observe PZR level for decrease and stability.
AP-530 Page 4 of 13 NC
I NC REV 00 Date 06-03-83 AP-530 FOLLOW-UP (Cont'd)
ACTIONS DETAILS e
Observe subcooling margin 5.
IF, subcooling margin f, O meter selected to incore THEN go to EP-290, thermocouples.
Tnadequate Core Cooling.
0,,,R, e
Determine:
AVG of 5 highest incore thermocouples.
RC PRESS Steam tables.
6.
IF adequate subcooling margin Establish HPI-PORY cooling:
loes not exist, THEN:
a.
Establish HPI-PORV a.
Open:
cooling e
MUV-73 e
MUV-58 b.
Ensure required OTSG b.
Start 2 HPI pumps levels c.
Refer to AP-380, c.
Open:
Engineered Safeguards Actuation.
e MUV-23 e
MUV-25 e
MUV-24 e
MUV-26 d.
When RC PRESS > 2300 PSIG, THEN open PORV7 AP-530 Page 5 of 13 NC
i NC REV 00 Date 06-03-83 AP-530
~
FOLLOW-UP (Cont'd)
ACTIONS DETAILS 7.
IF natural circulation is Verify natural circulation by ve ri fi ed,
observing:
THEN go to Follow-up step e
Tc =TSAT of OTSG.
20.
e AT develops and stabilizes e
The average of the 5 highest incores follows TH within 10*F.
T, Te, and Incores lower e
H when OTSG pressure is lowered.
8.
Establish HPI cooling.
1.
Open:
e MUV-58 e
MUV-73 2.
Start 2 HPI pumps 3.
Open:
I e
MUV-23 e
MUV-25 i
e MUV-24 e
MUV-26 4.
Cycle PORY to maintain subcooling margin < 100*F.
5.
Refer to AP-380, Engineered Safeguards Actuation, Follow-up step 7.
NC AP-530 Page 6 of 13 y-.--
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NC Rev. O Date XX-XX-XX AP-530 FOLLOW-UP (Cont'd)
ACTIONS DETAILS 9.
Establish required OTSG 1evel.
CONDITION LEVEL e
NO RCPs
~
50%
e Adequate subcooling margin e
Less than adequate 95%
subcooling margin e
< 2 HPI pu'mps available 95%
b 10.
IF natural circulation is Verify natural circulation by Tiri fi ed,
observing:
THEN go to Follow-up step e
Tc =TSAT of OTSG.
20.
e AT develops and stabilizes e
The average of the 5 highest incores follows TH within 10*F.
T, Tc, and Incores lower e
H when OTSG pressure is lowered.
NC AP-530 Page 7 of 13
NC REV 00 Date 06-03-83 AP-530 F0LLOW-UP (Cont'd)
ACTIONS DETAILS 11.
Lower OTSG pressure until OTSG TSAT is 40 - 60' below AVG of 5 lowest incore thermocouples.
12.
IF natural circulation is Verify natural circulation by
- verified, observing:
THEN go to Follow-up step e
Tc =TSAT of OTSG.
20.
e AT develops and stabilizes e
The average of the 5 highest incores follows TH within 10*F.
T, Tc, and Incores lower e
H when OTSG pressure is lowered.
NOTE RCPs are available when the following conditions are met:
e Pump start permissives e
Power available.
AP-530 Page 8 of 13 NC l
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NC REV 00 Date 06-03-83 AP-530 F0LLOW-UP (Cont'd)
ACTIONS DETAILS 13.
If[ RCP is available 1.
60*F below average of 5 THEN " BUMP" 1 RCP for lowest incores.
'ITTE C.
2.
IJ[ an RCP is available, THEN Bump 1 RCP for 10 seconds in loop with highest OTSG level.
3.
WHEN RC pressure has stabilized after pump bump (within 20 PSIG),
THEN determine if natural circulation is established.
IF fij) RCPs are available.
THEN go to Follow-up step 18.
14.
IF natural circulation is Verify natural circulation by
- verified, observing:
THEN go to Follow-up step e
Tc =TSAT of OTSG.
20.
e e6T develops and stabilizes e
The average of the 5 highest incores follows TH within 10*F.
T, Tc, and Incores lower e
H when OTSG pressure is lowered.
AP-530 Page 9 of 13 NC
{
NC REV 00 Date 06-03-83 AP-530 j
FOLLOW-UP (Cont'd)
ACTIONS DETAILS NOTE An RCP " Bump" is of 10 second duration.
15.
" Bump" remaining RCPs at 15 MIN intervals until all RCPs have been bumped.
16.
If[ natural circulation is Verify natural circulation by ve ri fi e d..
observing:
THEN go to Follow-up step e
Tc =TSAT of OTSG.
20.
e AT develops and stabilizes e
The average of the 5 highest incores follows TH within 10"F.
T, Tc, and Incores lower e
H l
l when OTSG pressure is lowered.
l 1
AP-530 Page 10 of 13 NC l
lL
l
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NC REV 00 Date 06-03-83 AP-530 F0LLOW-UP (Cont'd)
ACTIONS DETAILS 17.
WHEN 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or more has elapsed since reactor trip THEN:
a.
Open TBVs or ADVs and lower 90-100*F below incore OTSG pressure until OTSG temperature and TSAT is 90-100*F below maintain.
average of 5 highest incore temperatures.
o b.
Start 1 RCP and run b.
IF RCP permissives are met, continuously as long as at least one OTSG is THEN start I RCP and run available for heat continuously as long as one 5
removal.
OTSG is available for heat removal.
18.
IF natural circulation is Verify natural circulation by
- verified, observing:
THEN go to Follow-up step e
Te =TSAT of OTSG.
20.
e AT develops and stabilizes
( ~ 20' - 50*).
e The average of the 5 highest incores follows TH within 10*F.
e Tg, Te, and Incores lower when OTSG pressure is lowered.
AP-530 Page 11 of 13 NC
l i'
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NC REV 00 Date 06-03-83 AP-530 F0LLOW-UP (Cont'd)
ACTIONS DETAILS 19.
Maintain HPI cooling Refer to AP-380. Engineered Safeguards Actuation, Follow-up AND go to Follow-up step 24.
step 7.
NOTE RCPs are available when the following conditions are met:
o Pump start permissives e
Power available.
20.
IF[ RCPs are available AND adequate subcooling margin exists, THEN start:
a.
1 RCP in each loop gR, b.
2 RCPs in one loop.
21.
IF cooldown is required, THEN refer to AP-380, TngTneered Safeguards n
Actuation, Follow-up step 7.
AP-530 Page 12 of 13 NC
,s
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NC REV 00 Date 06-03-83 AP-530 FOLLOW-UP (Cont'dl ACTIONS DETAILS 22.
IF HPI established WHEN the following condition exist:
AND HPI stop conditions
- exist, o
High pressure Adequate subcooling margin THEN:
PZR level 2,50" a.
Ensure PORV and PORV BLK VLV closed.
S.R, e
Low pressure j
LPI flow > 1000 GPM in each train e
Stable for 2,20 MIN.
THEN stop HPI.
- 23. Maintain plant conditions.
24.
WHEN VP-580 AND SAT, THEN notify SS00.
AP-530 Page 13 of 13 NC l
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