ML020810182

Technical Specification Pages, Limerick. Unit 1 & 2, Amendment Nos 158 & 120 (TAC Nos MB2271 & MB2272)

ML020810182
Person / Time
Site:	Limerick
Issue date:	03/20/2002
From:	Gratton C NRC/NRR/DLPM/LPD1
To:	Kingsley O Exelon Generation Co, Exelon Nuclear
References
TAC MB2271, TAC MB2272
Download: ML020810182 (8)

Text

TABLE 3.3.3-1 (Continued)

EMERGENCY CORE COOLING SYSTEM ACTUATION INSTRUM-ENTATION ACTION STATEMENTS ACTION 30 - With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement:

a. With one channel inoperable, place the inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or declare the associated system inoperable.

b. With more than one channel inoperable, declare the associated system inoperable.

ACTION 31 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, declare the associated ECCS inoperable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

ACTION 32 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, place the inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

ACTION 33 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, restore the inoperable channel 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 declare the associated ECCS inoperable.

ACTION 34 - With the number of OPERABLE channels less than :equired by the Minimum OPERABLE Channels per Trip Function requirement:

a. For one channel inoperable, place the inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or declare the HPCI system inoperable.

b. With more than one channel inoperable, declare the HPCI system inoperable.

ACTION 35 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, place at least one inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or declare the HPCI system inoperable.

ACTION 36 - With the number of OPERABLE channels less than the Total Number of Channels, declare the associated emergency diesel generator and the associated offsite source breaker that is not supplying the bus inoperable and take the ACTION required by Specification 3.8.1.1 or 3.8.1.2, as appropriate.

LIMERICK - UN*IT 1 3/4 3-36 Amendment .N]o. --- , 34, 158

TABLE 3.3.2-I (3- r..

EMERGENCY CORE COOLING SYST=EM ACTUATI:2 - ,

ACTION STATEMENTS than the Total Number ACTION 37 - With the number of OPERABLE channels one less in the bypassed condition of Channels, place the inoperable device subject to the following conditions:

InoDerable Device Condition 127Y-llXOX and 127Z-lIXOX operable 127-11XOX 127-11XOX and 127Z-llXOX operable 127Y-IIX0X 127-11XOX and 127Y-llXOX operable.

127Z-IIX0X 3 breakers 127Z-llYOY operable for the other source, offsite source grid monitoring that for that source is maintained at or voltage Bus Source) above 230kV (for the 101 Safeguard (for the 201 Safeguard Bus Source),

or 525kV source is in service Load Tap Changer for that and the electrical and in automatic operation, buses and breaker alignments are maintained within bounds of approved plant procedures.

within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and or, place the inoperable channel in the tripped condition as 3.8.1.1 or 3.8.1.2, take the Action required by Specification appropriate.

required CHANNEL Operation may then continue until performance of the next FUNCTIONAL TEST.

3/4 3-36a Amendment No. 158 LIMIERICK - UNIT 1

BASES (Continued) 3/4.3.3 EMERGENCY CORE COOLING ACTUATION INSTRUMENTAT.ION outage times have been Specified surveillance intervals and maintenance 1 and 2, "Technical determined in accordance with NEDC-30936P, Parts Methodology (with Demonstration for BWR ECCS Specification Improvement the NRC and documented in the SER Actuation Instrumentation)," as approved by December 9, 1988 (Part 1) and (letter to D. N. Grace from A. C. Thadani dated December 9, 1988 (Part 2)).

letter to D. N. Grace from C. E. Rossi dated of the Emergency Core Successful operation of the required safety functions availability of adequate power for Cooling Systems (ECCS) is dependent upon the operated valves, and the pump motors, motor energizing various components such as that associated control components. If the loss of power instrumentation detects from the offsite power voltage levels are too low, the buses are disconnected power sources. The loss the onsite diesel generator (DG) sources and connected to detection overlapping of power relays in each channel have sufficient and functionality to permit operation subject to the conditions in characteristics provide discussion Bases 3/4.8.1, 3/4.8.2, and 3/4.8.3 Action Statement 37. of the offsite sources.

operability regarding parametric bounds for determining With an inoperable power relays are operable.

Those Bases assume that the loss of to 230kV (for the 101 Safeguard Bus 127Z-IIXOX relay, the grid voltage is monitored to increase the margin for the Source) or 525kV (for the 201 Safeguard Bus Source) operation of the 127Z-IIXOX relay.

its Trip Setpoint but within Operation with a trip set less conservative than on the basis that the difference its specified Allowable Value is acceptable Allowable Value is an allowance for between each Trip Setpoint and the allocated for each trip in the safety analyses.

instrument drift specifically 3/4.3.4 RECIRCULATION PUMP TRIP ACTUATION INSTRUMENTATION recirculation pump trip The anticipated transient without scram (ATWS) consequences of the unlikely occurrence system provides a means of limiting the response of the anticipated transient. The of a failure to scram during an the envelope of study events in plant to this postulated event falls within dated March 1971, NEDO General Electric Company Topical Report NEDO-10349, of the FSAR.

24222, dated December 1979, and Section 15.8 system is a supplement to The end-of-cycle recirculation pump trip (EOC-RPT) load rejection events, the the reactor trip. During turbine trip and generator vessel level decreasing to level EOC-RPT will reduce the likelihood of reactor pumps, reducing coolant flow in

2. Each EOC-RPT system trips both recirculation during two of the most limiting order to reduce the void collapse in the core feature pressurization events. The two events for which the EOC-RPT protective valves and fast closure of the will function are closure of the turbine stop turbine control valves.

control valves provides input A fast closure sensor from each of two turbine from each of the other two turbine to the EOC-RPT system; a fast closure sensor EOC-RPT system. Similarly, a control valves provides input to the second valves provides input to one EOC position switch for each of two turbine stop the other two stop valves provides RPT system; a position switch from each of EOC-PPT system, the sensor relay input to the other EOC-RPT system. For each logic for the fast closure of turbine contacts are arranged to form a 2-out-of-2 The turbine stop valves.

control valves and a 2-out-of-2 logic for the and trip both EOC-RPT system operation of either logic will actuate the recirculation pumps.

B 3 4 3-3 Aenr.ent No. 1 -, -ý,

LIMER:CK - J-7T 158

BASES INSTRUMENTATION (Continued) 3/4.3.4 RECIRCULATION PUMP TRIP ACTUATION use of a keyswitch which is Each EOC-RPT system may be manually bypassed by Operating administratively controlled. The manual bypasses and the automatic POWER are annunciated in the control Bypass at less than 30% of RATED THERMAL room.

the time assumed in the analysis between The EOC-RPT system response time is of the electric arc, i.e.,

initiation of valve motion and complete suppression of the sensor, the time 175 ms. Included in this time are: the response time response time of the system logic.

allotted for breaker arc suppression, and the B 3/4 3-3a Amendment No. 158 LIMERICK - UNIT 1

TABLE 3.3.3-1 (Ccnnue3d)

E4ERGENCY CORE COOLING SYSTEM, ACTUATION iNSTRUYENTA:TION ACTION STATEMENTS ACTION 30 - With the number of OPERABLE channels less than required by the Minimum OPERABPT E Channels per Trip Function requirement:

a. With one channel inoperable, place the inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or declare the associated system inoperable.

b. With more than one channel inoperable, declare the associated system inoperable.

ACTION 31 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, declare the associated ECCS inoperable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

ACTION 32 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, place the inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

ACTION 33 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, restore the inoperable channel 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 declare the associated ECCS inoperable.

ACTION 34 - With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement:

a. For one channel inoperable, place the inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or declare the HPCI system inoperable.

b. With more than one channel inoperable, declare the HPCI system inoperable.

ACTION 35 With the number of OPERABLE channels less than required by the Minimum OPERABLE Channels per Trip Function requirement, place at least one inoperable channel in the tripped condition within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or declare the HPCI system inoperable.

ACTION 36 - With the number of OPERABLE channels less than the Total Number of Channels, declare the associated emergency diesel generator and the associated offsite source breaker that is not supplying the bus inoperable and take the ACTION required by Specification 3.8.1.1 or 3.8.1.2, as appropriate.

LIMERICK - UNIT 2 3/4 3-36 Amendment No. 4-3/4, 120

TA.BLE 3.3.3-17 niud E:ERGENCY CORE COOLING SYSTEM ACTUA= N:S-F.2C~ATI ACTION STATLMETýTS than the Total Number ACTION 37 - With the number of OPERABLE channels one less inoperable device in the bypassed condition of Channels, place the subject to the following conditions:

Inoperable Device Condition 127-11XOX 127Y-IIX0X and 127Z-I1XOX operable 127Y-IIXOX 127-11XOX and 127Z-IIXOX operable 127Z-IIXOX 127-11XOX and 127Y-1IX0X operable.

127Z-IIYOY operable for the other 3 breakers monitoring that source, offsite source grid voltage for that source is maintained at or above 230kV (for the 101 Safeguard Bus Source) or 525kV (for the 201 Safeguard Bus Source),

Load Tap Changer for that source is in service and in automatic operation, and the electrical buses and breaker alignments are maintained within bounds of approved plant prccedures.

condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and or, place the inoperable channel in the tripped or 3.8.1.2, as appropriate take the Action required by Specification 3.8.1.1 the next required CHANNEL Operation may then continue until performance of FUNCTIONAL TEST.

3/4 3-36a Amendment No. 120 1 L M"ERT,-'" - UNIT 2

BASES 3/4.3.3 EMERGENCY CORE COOLING SYSTEM ACTUATION INSTRUYENTATION (Continued) have been Specified surveillance intervals and maintenance outage times NEDC-30936P, Parts 1 and 2, "Technical determined in accordance with for BWR ECCS Actuation Specification Improvement Methodology (with Demonstration in the SER (letter to D.

Instrumentation)," as approved by the NRC and documented

1) and letter to D. N.

N. Grace from A. C. Thadani dated December 9, 1988 (Part 2)).

Grace from C. E. Rossi dated December 9, 1988 (Part of the Emergency Core Successful operation of the required safety functions availability of adequate power for Cooling Systems (ECCS) is dependent upon the motors, motor operated valves, and the energizing various components such as pump detects that associated control components. If the loss of power instrumentation from the offsite power voltage levels are too low, the buses are disconnected The loss (DG) power sources.

sources and connected to the onsite diesel generator detection of power relays in each channel have sufficient overlapping to the conditions in characteristics and functionality to permit operation subject Bases 3/4.8.1, 3/4.8.2, and 3/4.8.3 provide discussion Action Statement 37.

operability of the offsite sources.

regarding parametric bound- for determining an inoperable of power relays are operable. With Those Bases assume that the loss (for the 101 Safeguard 127Z-llXOX relay, the grid voltage is monitored to 230kV (for the 201 Safeguard Bus Source) to increase the margin for Bus Source) or 525kV the operation of the 127Z-lIXOX relay.

Setpoint but Operation with a trip set less conservative than its Trip is acceptable on the basis that the within its specified Allowable Value Setpoint and the Allowable Value is an allowance difference between each Trip specifically allocated for each trip in the safety for instrument drift analyses.

3/4.3.4 RECIRCULATION PUMP TRIP ACTUATION INSTRUMENTATION pump trip The anticipated transient without scram (ATWS) recirculation limiting the consequences of the unlikely occurrence system provides a means of The response of the of a failure to scram during an anticipated transient.

study events in plant to this postulated event falls within the envelope of dated March 1971, NEDO General Electric Company Topical Report NEDO-10349, 24222, dated December 1979, and Section 15.8 of the FSAR.

is a supplement to The end-of-cycle recirculation pump trip (EOC-RPT) system rejection events, the the reactor trip. During turbine trip and generator load decreasing to level EOC-RPT will reduce the likelihood of reactor vessel level coolant flow in

2. Each EOC-RPT system trips both recirculation pumps, reducing two of the most limiting order to reduce the void collapse in the core during which the EOC-RPT protective feature pressurization events. The two events for stop valves and fast closure of the will function are closure of the turbine turbine control valves.

provides input A fast closure sensor from each of two turbine control valves the other two turbine to the EOC-RPT system; a fast closure sensor from each of Similarly, a control valves provides input to the second EOC-RPT system.

input to one EOC position switch for each of two turbine stop valves provides two stop valves provides RPT system; a position switch from each of the other EOC-RPT system, the sensor relay input to the other EOC-RPT system. For each the fast closure of turbine contacts are arranged to form a 2-out-of-2 logic for valves. The control valves and a 2-out-of-2 logic for the turbine stop and trio both operation of either logic will actuate the EOC-RPT system recirculation pumps.

B 3/4 3-3 Amendment No. 1;, 32, 33, 120 ill llar_

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BASES INSTRUYE=NTATION (Continued) 3/4.3.4 RECIRCULATION PUMP TRIP ACTUATION by use of a keyswitch which is Each EOC-RPT system may be manually bypassed administratively controlled. The manual bypasses and the automatic Operating POWER are annunciated in the control Bypass at less than 30% of RATED THERMAL room.

time assumed in the analysis between The EOC-RPT system response time is the suppression of the electric arc, i.e.,

initiation of valve motion and complete time of the sensor, the time 175 ms. Included in this time are: the response the response time of the system logic.

allotted for breaker arc suppression, and B 3/4 3-3a Amendment No. 120 LiNE-RC--K - u,.,i-. 2