ML19024A475

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Attachment 5 - List of Regulatory Commitments
ML19024A475
Person / Time
Site: Callaway Ameren icon.png
Issue date: 01/23/2019
From:
Ameren Missouri
To:
Office of Nuclear Reactor Regulation
Shared Package
ML19024A469 List:
References
LDCN 16-0013, ULNRC-06477
Download: ML19024A475 (2)


Text

Attachment 5 to ULNRC-06477 Page 1 of2 List of Regulatory Commitments to ULNRC-06477 Page 2 of 2 LIST OF REGULATORY COMMITMENTS Planned modifications are in process to achieve the capability for one Class 1 E electrical equipment NC train to provide adequate cooling for both trains of electrical equipment during normal and accident conditions by design changes. The planned modifications include the following:

Computer points are used to verily the DC switchboard rooms and ESF switchgear room temperatures are less than 87°F and provide an alarm to alert Control Room personnel.

The temperature limits established for these rooms is 87°F (this includes an allowance for instrument error of +/-3°F). The alarm setpoint on the associated temperature indicators will be lowered to 83°F.

Two circulating fans with isolation dampers, door penetrations and associated ductwork will be installed on the 2016 Level of the Control Building in the battery and switchboard rooms.

Four recirculation fans with isolation dampers and associated ductwork will be installed in the ESF switchgear rooms on the 2000 Level of the Control Building The wattage of the Control Room Pressurization heater will be reduced to 5 +/-

1 KW.

Ameren Missouri will revise the Callaway Emergency Operating Procedures to provide instructions for restarting the supplemental cooling system for the case when operation of the supplemental cooling system is desired or needed due to the inoperability of a Class 1 E electrical equipment NC train during or at the onset of an event/accident involving a loss of offsite power.

The planned modifications and procedure revisions will be completed prior to Mode 4 ascending during the Spring 2019 Refueling Outage The following table identifies those actions committed to by Ameren Missouri in this document.

Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.

Commitment Regulatory Commitment Due Date Tracng Number 50428 50429 50430