NUREG-1537, Part 2 - NRC

ELECIRICAL POWER SYEMS
* The design of normal electrical systems gives reasonable'assurance that use
or malfunction of electrical power systems and controls for experiments
could not cause reactor damage or prevent safe reactor shutdown.
* The technical specifications, including testing and surveillance provisions,
ensure that the normal electrical system Will be operable.
8.2 Emergency Electrical Power Systems
Emergency electrical power systems will be required if SAR analyses show that
assured power is required to maintain safe reactor shutdown (Chapter 4), to
support operation of a required engineered safety feature (Chapters 6 and 13), or
to protect the' public from release of radioactive effluents (Chapters II and 13).
For some reactor facilities, emergency electrical power also might be required to
avoid damage to an experiment (Chapter 10). For all of these functions,
monitoring or sensing channels may also be required to 'operate on emergency
power. Emergency electrical power at a non-power reactor is defined as any
temporary substitute for normal electrical service. Some non-power reactor
facilities provide emergency electrical power for functions'other than those noted
above; these should be discussed. The reviewer should focus on those uses
required to ensure that the health and safety of the public are protected from such
unsafe reactor conditions as loss of fuel integrity or uncontrolled release of
radioactive material.
Areas of Review
Non-power reactors should be designed for passive'reactor shutdown if normal
electrical service is interrupted. Some non-power reactors may require emergency
power for maintaining safe facility shutdown, for example, decay heat removal, and'
some non-power reactors may use emergency power to avoid interruption of their
research facilities or utilization program. 'The areas of review for this section are
the design bases derived frtm other chapters of the SAR and their implementation
for the emergency electrical power 'systems at the specific' faility. The reviewer
should focus on the safety-related features of any emergency electrical power
systems.
In other SAR chapters, the applicant'presents the calculated responses of reactor
systems to interruption of offsite power and the potential consequences. This
section should describe and discuss any emergency electrical 'systems designed to
avoid fuel damage or the release of radioactive material to the'environment. The
reviewer should also evaluate events of lesser consequences and the emxiergency
electrical power system design that mitigates them. ,'
REvO,2/96 8-3 STANDAP.D REVIEW PLAN
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