ML20205C742
| ML20205C742 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Haddam Neck, 05000000 |
| Issue date: | 12/13/1985 |
| From: | CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20204H467 | List:
|
| References | |
| EOP-35-FR-I.1, NUDOCS 8810260562 | |
| Download: ML20205C742 (7) | |
Text
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E. J. Mroc:
2-1-85 Form Apprcv;d by Station Supsrintendent Effective Date w
STATION PROCEDURE COVER SHEET
- [ )-
A.
IDENTIFICATION v
Number E0P 35 FR-I.1 Rev.
1_
Title RESPONSE TO HIGH PRESSURIZER LEVEL Prepared By G. Olson B.
REVIEW I have reviewed the above procedure and have found it to be satisfactory.
TITLE SIGNATURE DATE I[b DEPARTMENT HEAD
/
C.
UNREVIEWED SAFETY QUESTION EVALUATION 00CUMENTATION REQUIRED:
(Significant change in procedure method or scope YES [ ]
NO NJ as described in FSAR)
(If yes, document in PORC/SORC meeting minutes)
ENVIRONMENTAL IMPACT (Adverse environmental impact)
YES [ ]
NO[y]
(If yes, document in PORC/SORC meeting minutes)
D.
INTEGRATED SAFETY REVIEW REQUIRED (Affects response of Safety Systems, performance YES [ ]
NO [y]
of safety-related control systems or performance of control systems which may indirectly affect safety system response.)
(If yes, document in PORC/SORC meeting minutes.)
E.
PROCEDURE REQUIRES b ORC REVIEW YES %
NO [ ]
F.
h $0RC APPROVAL h 0RC Meeting Number 3 -hM SS 4 G.
APPROVAL AND IMPLEMENTATION TM attached procedure is hereby approved, and effective on the date below:
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Station /Serwice/ Unit Superinten6ent Effective Date SF 301 Rev. 7 Ogto2gggg h oo7og Page 1 of 1 PDR P
E0P 35 FR-I.1 Page 1 Rev. 1 RESPONSE TO HIGH PRESSURIZER LEVEL Page No.
Eff. Rev.
1-6 1
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i t-RESPONSE TO HIGH PRESSURIZER LEVEL E0P 35 FR-I.1 Page 2 Rev. 1 A.
PURPOSE This procedure provides actions to respond to a high pressurizer level.
B.
ENTRY CONDITIONS This procedure was written for Modes 1, 2, 3 and 4 assuming RHR is not in service and SI has been terminated. Using this procedure when not in these modes requires a step by step evaluation to determine if the required action is still applicable to current plant conditions.
This procedure is entered from E0P 35 F-0.6, INVENTORY Critical Safety Function Status Tree on a YELLOW condition.
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O MPS064-2 19 43
RESPONSE TO HIGH PRESSURIZER LEVEL E0P 35 FR-I.1 Page 3 Rev. 1 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED 1
Check if SI Has Been Return to procedure and Terminated step in effect.
a.
SI pumps - ALL STOPPED b.
Charging to Cold Leg Cold Leg injection valves - CLOSED CAUTION Charging and letdowrt flows should be carefully-controlled to avoid sudden RCS pressure changes since the PZR may be water solid.
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O OP50641 344
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RESPONSE TO HIGH PRESSURIZER,-
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STEP ACTION / EXPECTED R ESPON*
PP
- _h 27 CSTMNED 2
Check if Charging Flow Established a.
Vt.Aty Recire Flowpm
'$ Re ' t ESTABLISEED b.
Charging pump - AT LEAS' torr the icilc eing ONE RUNNING IF kP'. flow
't3 F
. e rmal barrir
- lost, T'2
- M 4 3eal T'ye~ction i effected RCP before starting charging pumps.
- 2. Start one charging Pump
- 3. IF geal injection
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flow isolated THEN restore seal injection to RCPs c.
Instrument Air to c.
Establish instrument air Containment - ESTABLISHED to contair. ment.
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- 1. One instrument air compressor RUNNING
- 2. OPEN instrument air containment isolation valves d.
Charging flow -
d.
Establish normal ESTABLISHED charging flow I_F charging can NE be established, THEN establish excess letdown as per OP 3304A, CHARGING AND LETD0kW Go to Step 5.
3 Check Letdown - IN SERVICE Establish 120 gpm letdown AT 120 gpm IF letdown can NOT be established, THEN establish excess letdown as per OP 3304A, CHARGING AND LETD0%H
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oPSC68-1 3 44
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RESPONSE TO HIGH PRESSURI?L LEVEL E0P 35 FR-1.1 Page 5 Rev. 1 STEP ACTION /EEPECTED RESPONSE RESPONSE NOT 08TAINED Check if RCP Seal Return Flow Should Be Established a.
RCS pressure > 115 psia a.
Go to Step 5 b.
Establish flow b.
Go to Step 5
- 1. Verify RPCCW flow to Seal Water Heat Exchanger-ESTABLISHED
- 2. OPEN RCP seal return containment isolation valves.
5 Check PZR Pressure a.
Pressure - LESS THAN a.
Verify at least one 2350 PSIA PZR PO4V and block valve open.
IF MOT, THEN open one PORV and block valve as necessary until pressure less than 2350 psia.
b.
Pressure - LESS THAN b.
Control charging and 2275 PSIA letdown flow as necessary to decrease PZR pressure to less than 2275 psia.
6 Verify PZR PORVs - CLOSED Manually close PORVs.
IF any valve can NOT be closed, THEN manually close its block valve.
7 Turn on PZR Heaters OP50441 3-44
RESPONSE TO MIGH PRESSURIZER LEVEL E0P 35 FR-I.1 Page 6 Rev. 1
~-'
STEP ACTICWEXPECTED RESPONSE RESPONSE NOT OBTAINED 8
Check PZR Spray Valves a.
Normal spray valves -
a.
Manually close spray CLOSED valves.
IF any valve can NOT be closed, THEN stop RCP(s) supplying failed spray valve (s).
b.
Auxiliary spray valve -
b.
Manually close CLOSED auxiliary spray valve.
IF valve can NOT be cl~o' sed, THEN perform the following
- 1. CLOSE Charging Header Flow Controller
- 2. CLOSE Letdown Low Pressure Controller
- 3. OPEN one reactor coolant loop drain
- 4. OPEN excess letdown heat exchanger inlet isolation
.N
- 5. Check excess letdown
(
)
diversion valve in VCT position
- 6. OPEN excess letdown flow control valve 9
Control Charging and Letdown Flow As Necessary To Maintain RCS Pressure Stable i
10 Check PZR Level - LESS Return To Step 9.
TRAN 89%
11 Return To Procedure And l
Step In Effect
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