ML15313A066

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2015 Clinton Power Station Initial License Examination Outline Review Comments-Resolutions
ML15313A066
Person / Time
Site: Clinton Constellation icon.png
Issue date: 11/06/2015
From:
Division of Reactor Safety III
To:
Zoia, C D
Shared Package
ML15124A054 List:
References
Download: ML15313A066 (2)
v • d • e


Text

Clinton 2015 OUTLINE REVIEW comments/questions

1) QUESTION: We discussed dropping the event 2 tech spec call from scenario 1. If this is done what will be the 2nd T.S. call for SRO-I 3 and 4?

ANSWER: the Uncoupled Rod event includes a T. S. call.

2) QUESTION: Is system JPM f D, N, M, or P?

ANSWER: it is a new JPM.

3) QUESTION: The Memo describing the Outline development methodology states that one of the SRO Admin JPMs is from a previous exam. However the SRO ES-301-1 shows all the JPMs as new or direct from the bank. Should one of the bank JPMs be marked previous?

ANSWER: The outline was revised and the JPM that was going to be repeated from a previous exam was replaced before submittal to the NRC.

MEMORANDUM To: Bruce Palagi, NRC Chief Examiner From : Tony Jennings, Clinton Power Station ILT 14-1 NRC Exam Author Date: 1/9/15 Subj: Changes to the ILT 14-1 NRC Exam Outlines Following the 75-day Submittal W ritten Exam No changes were made.

JPMs (Simulator/In-Plant and Admin)

1. JPM418 Parallel DG lB With Offsite Power - the Type Code was modified from EN,S to EN,M,S based on comments from the CE following the 75 day submittal.

Scenarios

2. Scenario 1
a. Event 2 (LPCS Room Fan Trip) was eliminated due to an excessive number of TS calls in the scenario. Events 3 (uncoupled rod) and 6 (Loss of Control Power to Suppression Pool Dump Valve 1SM001A) are the two ITS calls that were retained. ES-301-5 and ES-301-6 forms w ere revised accordingly to ensure the minimum number of ITS calls for each SRO candidate. *
b. Events 6 (raise power with rods to 29%) and 7 (uncoupled rod) were moved to events 2 and 3 in the scenario outline to ensure the maximum power level for the TDRFP High Bearing Temperature event was not exceeded.
c. Event 8 (TDRFP 'A' High Bearing Temperature) was moved to event 4 in the scenario outline to make the scenario run more efficiently. The transition to the MDRFP that is required in this event takes approximately 30 minutes. Moving the event earlier in the scenario allows the remaining events to be run while the MDRFP starting sequence is in progress. The rema ining events from the original outline were re-sequenced accordingly.
3. Scenario 3
a. Event 4 (Loss of Main Generator H2 requiring power reduction) - the malfunction rate was reduced from 5% to 3% due to comments from the validation team that the rate of H2 loss was a bit too fast. The new rate allows approximately 3 more minutes for crew actions to take place while Generator H2 pressure is decaying.

Clinton 2015 OUTLINE REVIEW comments/questions

1) QUESTION: We discussed dropping the event 2 tech spec call from scenario 1. If this is done what will be the 2nd T.S. call for SRO-I 3 and 4?

ANSWER: the Uncoupled Rod event includes a T. S. call.

2) QUESTION: Is system JPM f D, N, M, or P?

ANSWER: it is a new JPM.

3) QUESTION: The Memo describing the Outline development methodology states that one of the SRO Admin JPMs is from a previous exam. However the SRO ES-301-1 shows all the JPMs as new or direct from the bank. Should one of the bank JPMs be marked previous?

ANSWER: The outline was revised and the JPM that was going to be repeated from a previous exam was replaced before submittal to the NRC.

MEMORANDUM To: Bruce Palagi, NRC Chief Examiner From : Tony Jennings, Clinton Power Station ILT 14-1 NRC Exam Author Date: 1/9/15 Subj: Changes to the ILT 14-1 NRC Exam Outlines Following the 75-day Submittal W ritten Exam No changes were made.

JPMs (Simulator/In-Plant and Admin)

1. JPM418 Parallel DG lB With Offsite Power - the Type Code was modified from EN,S to EN,M,S based on comments from the CE following the 75 day submittal.

Scenarios

2. Scenario 1
a. Event 2 (LPCS Room Fan Trip) was eliminated due to an excessive number of TS calls in the scenario. Events 3 (uncoupled rod) and 6 (Loss of Control Power to Suppression Pool Dump Valve 1SM001A) are the two ITS calls that were retained. ES-301-5 and ES-301-6 forms w ere revised accordingly to ensure the minimum number of ITS calls for each SRO candidate. *
b. Events 6 (raise power with rods to 29%) and 7 (uncoupled rod) were moved to events 2 and 3 in the scenario outline to ensure the maximum power level for the TDRFP High Bearing Temperature event was not exceeded.
c. Event 8 (TDRFP 'A' High Bearing Temperature) was moved to event 4 in the scenario outline to make the scenario run more efficiently. The transition to the MDRFP that is required in this event takes approximately 30 minutes. Moving the event earlier in the scenario allows the remaining events to be run while the MDRFP starting sequence is in progress. The rema ining events from the original outline were re-sequenced accordingly.
3. Scenario 3
a. Event 4 (Loss of Main Generator H2 requiring power reduction) - the malfunction rate was reduced from 5% to 3% due to comments from the validation team that the rate of H2 loss was a bit too fast. The new rate allows approximately 3 more minutes for crew actions to take place while Generator H2 pressure is decaying.
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