ML041960100
| ML041960100 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 07/02/2004 |
| From: | NRC/NRR/DLPM |
| To: | |
| Shukla G, NRR/DLPM/LPDIV-2/415-8439 | |
| Shared Package | |
| ML041950260 | List: |
| References | |
| TAC MB6758, TAC MB6759 | |
| Download: ML041960100 (3) | |
Text
Pressurizer PORVs 3.4.11 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.11 Pressurizer Power Operated Relief Valves (PORVs)
LCO 3.4.11 APPLICABILITY:
Each PORV and associated block valve shall be OPERABLE.
MODES 1, 2, and 3.
ACTIONS
NOT Separate Condition entry is allowed for each PO P------------------------------------------------------------
CONDITION REQUIRED ACTION COMPLETION TIME A. One or more PORVs A.1 Close and maintain 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> inoperable solely due to power to associated excessive seat leakage.
block valve.
B. One PORV inoperable for B.1 Close associated block 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> reasons other than valve.
excessive seat leakage.
AND B.2 Remove power from 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> associated block valve.
I AND B.3 Restore the Class I 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> PORV to OPERABLE status.
C.
One block valve inoperable.
NOTE-------------------
1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> Required Actions do not apply when block valve is inoperable solely as result of complying with Required Actions B.2 or E.3.
C.1 Place associated PORV in manual control.
AND (continued)
DIABLO CANYON - UNITS 1 & 2 3.4-19 Unit 1 - Amendment No. 435, 46, 171 Unit 2 - Amendment No. 435, 470,172
Pressurizer PORVs 3.4.11 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME C. (continued)
C.2 If the block valve is 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> associated with a Class I PORV:
Restore block valve to OPERABLE status.
OR C.3 If the block valve is 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> associated with the non-Class I PORV:
Close the block valve and remove its power.
D.
Required Action and D.1 Initiate action to restore Immediately associated Completion Class I PORV and/or Time of Condition A, B, or C associated block valves(s) not met.
to OPERABLE status.
AND D.2 Be in MODE 3.
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> AND D.3 Be in MODE 4.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> E. Two Class I PORVs E.1 Initiate action to restore Immediately inoperable for reasons other Class I PORVs to than excessive seat OPERABLE status.
leakage.
AND E.2 Close associated block 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> valves.
AND E.3 Remove power from 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> associated block valves.
AND E.4 Be in MODE 3.
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> AND E.5 Be in MODE 4.
12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> (continued)
DIABLO CANYON - UNITS 1 & 2 3.4-20 Unit 1 - Amendment No. 435,171 Unit 2 - Amendment No. 4-35,172
Pressurizer PORVs 3.4.11 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.11.1 NOTE----
Not required to be performed with block valve closed in accordance with the Required Actions of this LCO.
Perform a complete cycle of each block valve.
92 days SR 3.4.11.2 NOTE----
Required to be performed during MODES 3 or 4.
Perform a complete cycle of each PORV.
In accordance with the IST Plan.
SR 3.4.11.3 Demonstrate OPERABILITY of the safety related 24 months nitrogen supply for the Class I PORVs.
SR 3.4.11.4 Perform a COT on each required Class 1 PORV, 92 days excluding actuation.
SR 3.4.11.5 Perform CHANNEL CALIBRATION for each required 24 months Class 1 PORV actuation channel.
DIABLO CANYON - UNITS 1 & 2 3.4-22 Unit 1 - Amendment No. 435,171 Unit 2 - Amendment No. 435,172