ML20170A422

Independent Spent Fuel Storage Installation Updated Decommissioning Safety Analysis Report, DSAR-9.9, Rev. 0, Auxiliary Systems, Turbine Plant Cooling Water System

ML20170A422
Person / Time
Site:	Fort Calhoun, 07100256
Issue date:	04/30/2020
From:	Omaha Public Power District
To:	Office of Nuclear Reactor Regulation, Office of Nuclear Material Safety and Safeguards
Shared Package
ML20170A380	List: LIC-20-0005, Independent Spent Fuel Storage Installation, Technical Specification Basis ML20170A382 ML20170A383 ML20170A384 ML20170A385 ML20170A387 ML20170A388 ML20170A389 ML20170A390 ML20170A391 ML20170A392 ML20170A393 ML20170A394 ML20170A395 ML20170A396 ML20170A397 ML20170A398 ML20170A399 ML20170A400 ML20170A401 ML20170A402 ML20170A403 ML20170A404 ML20170A405 ML20170A406 ML20170A408 ML20170A409 ML20170A410 ML20170A411 ML20170A412 ML20170A414 ML20170A415 ML20170A416 ML20170A417 ML20170A418 ML20170A419 ML20170A420 ML20170A421 ML20170A422 ML20170A423 ML20170A424 ML20170A425 ML20170A426 ML20170A427 ML20170A428 ML20170A429 ML20170A430 ML20170A431 ML20170A432 ML20170A433 ... further results
References
LIC-20-0005
Download: ML20170A422 (4)

Text

Page 1 of 4 DSAR-9.9 Auxiliary Systems Turbine Plant Cooling Water System Rev 0 Safety Classification: Usage Level:

Safety Information Change No.: EC 69283 Reason for Change: This section is being updated to reflect the permanent cessation of operations of Fort Calhoun Station. The contents of this section have been changed to remove any information which is not applicable during decommissioning.

Preparer: J. Reimers Fort Calhoun Station

DSAR-9.9 Information Use Page 2 of 4 Turbine Plant Cooling Water System Rev. 0 Table of Contents 9.9 Turbine Plant Cooling Water System ............................................................................ 3 9.9.1 Design Bases .................................................................................................. 3 9.9.2 System Description.......................................................................................... 3 9.9.3 System Components ....................................................................................... 3 9.9.4 System Operation ............................................................................................ 3 9.9.5 Design Evaluation ........................................................................................... 4 9.9.6 Availability and Reliability ................................................................................ 4 9.9.7 Tests and Inspections...................................................................................... 4

DSAR-9.9 Information Use Page 3 of 4 Turbine Plant Cooling Water System Rev. 0 9.9 Turbine Plant Cooling Water System 9.9.1 Design Bases The turbine plant cooling water system is a closed loop which provided cooling for conventional plant equipment such as the plant air compressors.

9.9.2 System Description The turbine plant cooling water system is shown in P&ID 11405-M-258. One full capacity, electric motor driven, horizontally split case pump circulates clean, treated, cooling water through a full capacity heat exchanger to the various plant equipment items which require cooling. The turbine plant cooling water is cooled in turn by Potable Water system. The turbine plant cooling water temperature is controlled at 95°F or below. A suction head tank is provided for system surges with manually controlled makeup. The makeup line along with a recirculation line allows chemicals, which are placed in a dissolving basket, to be added to the system.

A standby full capacity pump, heat exchanger and temperature control system are provided.

9.9.3 System Components The turbine plant cooling water circulating pumps are of the horizontally split case type conforming to the Standards of the Hydraulic Institute.

The heat exchangers are single pass shell and tube type and conform with TEMA Standards. Potable water flows through the tubes and the turbine plant water to be cooled flows through the shell side. The water box heads have quick opening inspection ports; the tubes are 304 stainless steel. The temperature control system consists of a heat exchanger bypass line and a three-way butterfly valve with a temperature sensing bulb and controller.

Piping conforms to the requirements of Appendix N (Reclassification of Systems).

9.9.4 System Operation After initial system balancing, a minimum of operating attention is necessary.

The cooling water temperature is controlled by the control system.

One pump and heat exchanger handle the system cooling requirements.

The standby equipment can be brought into service manually by starting the standby pump and manipulating the heat exchanger isolation valves.

DSAR-9.9 Information Use Page 4 of 4 Turbine Plant Cooling Water System Rev. 0 9.9.5 Design Evaluation The design temperature for the turbine plant cooling water supply is 95°F which was based on a river water temperature of 85°F. The system is normally operated at a temperature below the 95°F design value. The 95°F cooling water temperature satisfies all cooling needs.

9.9.6 Availability and Reliability The equipment is of the standard type used in the power industry. A standby pump and a standby heat exchanger are provided to allow for maintenance during plant operation.

9.9.7 Tests and Inspections The piping system was hydrostatically tested to 1-1/2 times the system design pressure. The pumps were factory tested to ensure compliance with design conditions. Field performance tests were made on the system on an operating basis.