ML20086R355
| ML20086R355 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 12/12/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20086R357 | List: |
| References | |
| NPF-37-A-044, NPF-66-A-044, NPF-72-A-033, NPF-77-A-033 NUDOCS 9201020016 | |
| Download: ML20086R355 (2) | |
Text
k REACTOR COOLANT SYSTEM OVERPRESSURE PROTECTION SYSTEMS LIMITING CONDITION FOR OPERATION 3.4.9.3 At least two overpressure protection devices shall be OPERABLE, and each device shall be either:
a.
A residual heat removal (RhR) suction relief valve with a lift setting of less than or equal to 450 psig, or b.
A power operateo relief valve (PORV) with a lift setpoint that varies with RCS temperature which coes not exceed the lithit established in Figure 3.4-4.
APPLICABillTY: MODES 4, 5, and 6 with the reactor vessel head on.
ACTION:
a.
With one of the the required overpressure protection oevices inoperable in MODE 4, restore two overpressure protection devices to OPERABLE status within 7 days or depressurize and vent the RCS throuSh at least a 2 square inch vent within the next 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
b.
With one of the two required overpressure protection oevices inoperable in MODES 5 or 6, restore two overpressure protection devices to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or vent the RCS through at least a 2 square inch vent within the next 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, c.
With both of the required overpressure protection aevii.es inoperable, depressurize and vent the RCS through at least a 2 square inch vent within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
d.
With the RCS vented per ACTIONS a, b, or c, verify the vent pathway at least once per 31 days when-the pathway is provided by a valve (s) that is lockea, sealed, or otherwise secured in the open position; otherwise, verify the vent pathway every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
e.
In the event either the PORVs, RHR suction relief valves, or the RCS l
vents are used to mitigate an RCS pressure transient, a Special Report shall be prepared and submitted to the Comission pursuant to Specification 6.9.2 within 30 days.
The report shall describe the circumstances initiating the transient, the effect of the PORVs, RHR L
suction relief valves, or RCS vents on the transient, and any corrective action necessary to prevent recurrence.
f.
The provisions of Specification 3.0.4 are not applicable.
BYRON - UNITS 1 & 2 3/4 4-39 AMENDMENT NO. 37. 44 9201020016 911212 PDR ADOCK 05000454 P
hl%C10R COOLANT Si! TEM OVERPRESSbRE PP.0TECT10N SYSTEMS LIMITING CONDITION FLR OPERATION 1
3.4.9.3 At Icest two overpressure protection devices shall be OPERABLE, and each device shall te either:
c.
A residual hect removal (RHR) suction relief valve with a lift setting 01 less than er equal to 450 psig, or b.
A power operateu relief valve (PORV) with a lift setpoint that 56r ies with RCS tcn.perature which does not exceed the limit tstablisheo in Figure 3.4-4.
APPLICABILITY: RCDES 4, 5, and 6 with the reactor vessel head on.
ACTION:
a.
With one'of the two required overpressure protection devices inoperable in MODE 4, restore two overpressure protection devices to OPERABLE status within 7 days or depressurize and vent the RCS thrcush at least a 2 square inch vent within the next 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
b.-
With onc ct the two required overpressure protection oevices inoperable in MODES S or 6, restore two overpressure protection cevices to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or vent the RCS through at least a 2 square inch vent within the next 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
c.
With both of the required overpressure protection devices inoperable, depressurize and vent the RCS through at least a 2 square inch vent within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, d.
With the RCS vented per ACTIONS a, b, or c, verify the vent pathway et least once per 31 days when the pathway is provided by a valve (s) that is locked, sealed, or otherwise secured in the open position; otherwise, verify the vent pathway every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, e.
In the event either the PORVs, RHR suction relief valves, or.the RCS vents are used to nitigate an RCS pressure transient, a Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9.2 within 30 days. The report shall describe the circumstances initiating the transient, the effect of the PORVs, RHR suction relief valves, or RCS vents on the transient, and any corrective action necessary to prevent recurrence, f.
The prcvisiens of Specification 3.0.4 are not applicable.
BRA 10 WOOD - UNITS 1 & 2 3/4 4-39 AMENDMENT NO. 30. 33 l
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