NUREG-1537, Part 2 - NRC

CHAPTR5
Evaluation Findings
This section of the SAR should contain sufficient information to support the
following types of conclusions, which will be included in the staffs safety
evaluation report:
Design bases and design features give reasonable assurance that the
nitrogen-16 control system can function as proposed and reduce potential
doses to personnel so that doses do not exceed the requirements of 10 CFR
Part 20 and are consistent with the facility ALARA program.
* Design and functional operation of the nitrogen-16 control system give
reasonable assurance that the system will not interfere with reactor cooling
under anticipated reactor operating conditions and will not reduce cooling
below the acceptable thermal-hydraulic performance discussed in Chapter 4
of the SAR.
* Design features give reasonable assurance that malfunction of the nitrogen-
16 control system will not cause uncontrolled loss or release of primary
coolant and will not prevent safe reactor shutdown.
* The technical specifications, including testing and surveillance, provide
reasonable assurance of necessary nitrogen-16 control system operability
for normal reactor operations.
5.7 Auxiliary Systems Using Primary Coolant
Areas of Review
The primary coolant of a non-power reactor may serve functions other than
cooling the reactor fuel. Some of these auxiliary functions involve cooling other
heated components, which may affect the heat load of the primary coolant system.
Some of the auxiliary functions involve radiation shielding, which may not
contribute to the heat load but could require that the primary coolant be diverted
or distributed to subsystems not involving core cooling
Auxiliary uses of the primary coolant could affect its availability as a fuel coolant,
which is its principal use. Although the principal discussions of these auxiliary
systems should be located in other sections of the SAR, their effects on the coolant
systems should be summiarized in this section. Auxiliary systems that may use
primary coolant include the following-
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