ML19141A101

Summary of Exelon'S Proposal for Implementation of TSTF-500-Technical Specification Changes

ML19141A101
Person / Time
Site:	Peach Bottom
Issue date:	05/21/2019
From:	Jennifer Tobin Plant Licensing Branch 1
To:	Bryan Hanson Exelon Nuclear
Tobin J 415-2328
References
Download: ML19141A101 (9)

Text

Summary of Exelon's Proposal for Implementation of TSTF-500-Technical Specification Changes The proposed changes modify the wording in TS Limiting Condition for Operation (LCO) 3.8.4, DC Sources - Operating to add an additional LCO for the opposite Unit's inoperable battery charger condition. The proposed changes are required to fix simultaneous conflicting LCO Required Action Completion Times of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for one unit and 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> for the other unit for a single inoperable battery charger on one Unit. The current conflicting concurrent 12-hour and 72-hour Completion Times for Unit 2 and Unit 3 for one unit's inoperable battery charger was an unidentified imbedded error incorporated under TS Amendments 320 and 323, which adopted TSTF-500.

Please see attached Technical Specification proposed markups for Unit 2 and Unit 3, respectively.

DC Sources Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS 3.8.4 DC Sources Operating LCO 3.8.4 The following DC electrical power subsystems shall be OPERABLE:

a. Unit 2 Division I and Division II DC electrical power subsystems; and

b. Unit 3 Division I and Division II DC electrical power subsystems.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One Unit 3 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO due to performance of 3.8.7, "Distribution SR 3.8.4.7 or Systems Operating," when SR 3.8.6.6. Condition A results in de-energization of a Unit 2 4 kV emergency bus or de-energization of a Unit 3 DC bus.

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A.1 Restore Unit 3 DC 7 days electrical power subsystem to OPERABLE status.

(continued)

PBAPS UNIT 2 3.8-28 Amendment No.

DC Sources Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One Unit 3 battery B.1 Restore Unit 3 battery 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> charger on one terminal voltage to subsystem inoperable. greater than or equal to the minimum established float voltage.

AND B.2 Verify battery float Once per 12 current < 2 amps. hours AND B.3 Restore battery charger 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to OPERABLE status.

(continued)

PBAPS UNIT 2 3.8-28a Amendment No.

DC Sources Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME BC. One Unit 3 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO for reasons other than 3.8.7, "Distribution Condition A or B. Systems Operating," when Condition B results in de-energization of a Unit 2 4 kV emergency bus.

---

BC.1 Restore Unit 3 DC 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> electrical power subsystem to OPERABLE status.

CD. One Unit 2 battery CD.1 Restore Unit 2 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> charger on one battery terminal subsystem inoperable. voltage to greater than or equal to the minimum established float voltage.

AND CD.2 Verify battery float Once per 12 current < 2 amps. hours AND CD.3 Restore battery 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> charger to OPERABLE status.

(continued)

PBAPS UNIT 2 3.8-29 Amendment No.

DC Sources Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME DE. One Unit 2 DC DE.1 Restore Unit 2 DC 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> electrical power electrical power subsystem inoperable subsystem to OPERABLE for reasons other than status.

condition CD.

EF. Required Action and EF.1 Be in MODE 3. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Associated Completion Time of Condition A, AND B, C, D, or E not met.

DF.2 Be in MODE 4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> FG. Two or more inoperable FG.1 Enter LCO 3.0.3. Immediately DC electrical power subsystems.

PBAPS UNIT 2 3.8-29a Amendment No.

DC Sources Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS 3.8.4 DC Sources Operating LCO 3.8.4 The following DC electrical power subsystems shall be OPERABLE:

a. Unit 3 Division I and Division II DC electrical power subsystems; and

b. Unit 2 Division I and Division II DC electrical power subsystems.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One Unit 2 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO due to performance of 3.8.7, "Distribution SR 3.8.4.7 or Systems Operating," when SR 3.8.6.6. Condition A results in de-energization of a Unit 3 4 kV emergency bus or de-energization of a Unit 2 DC bus.

---

A.1 Restore Unit 2 DC 7 days electrical power subsystem to OPERABLE status.

(continued)

PBAPS UNIT 3 3.8-28 Amendment No.

DC Sources Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One Unit 2 battery B.1 Restore Unit 2 battery 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> charger on one terminal voltage to subsystem inoperable. greater than or equal to the minimum established float voltage.

AND B.2 Verify battery float Once per 12 current < 2 amps. hours AND B.3 Restore battery charger 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to OPERABLE status.

(continued)

PBAPS UNIT 3 3.8-28a Amendment No.

DC Sources Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME BC. One Unit 2 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO for reasons other than 3.8.7, "Distribution Condition A or B. Systems Operating," when Condition B results in de-energization of a Unit 3 4 kV emergency bus.

---

BC.1 Restore Unit 2 DC 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> electrical power subsystem to OPERABLE status.

CD. One Unit 3 battery CD.1 Restore Unit 3 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> charger on one battery terminal subsystem inoperable. voltage to greater than or equal to the minimum established float voltage.

AND CD.2 Verify battery float Once per 12 current < 2 amps. hours AND CD.3 Restore battery 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> charger to OPERABLE status.

(continued)

PBAPS UNIT 3 3.8-29 Amendment No.

DC Sources Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME DE. One Unit 3 DC DE.1 Restore Unit 3 DC 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> electrical power electrical power subsystem inoperable subsystem to OPERABLE for reasons other than status.

conditions CD.

EF. Required Action and EF.1 Be in MODE 3. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> Associated Completion Time of Condition A, AND B, C, D, or E not met.

EF.2 Be in MODE 4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> FG. Two or more inoperable FG.1 Enter LCO 3.0.3. Immediately DC electrical power subsystems.

PBAPS UNIT 3 3.8-29a Amendment No.