NUREG-1537, Part 2 - NRC

CHAPrER 8
* The system should be designed to permit safe reactor shutdown and to
prevent uncontrolled release of radioactive material if offsite power is
interrupted or lost. Reactor shutdown is generally achieved by a reactor
scram.
* Electrical power circuits should be isolated sufficiently to avoid
electromagnetic interference with safety-related instrumentation and
control functions.
* Technical specifications should be provided to ensure operability
commensurate with power requirements for reactor shutdown and to
prevent uncontrolled release of radioactive material.
ReWew Procedures
The reviewer should (1) compare the design bases of the normal electrical systems
with the requirements discussed in other chapters of the SAR, including Chapters
4, 5, 7, 9, 10, 11, and 13; (2) confirm that the design characteristics and
components of the normal electrical system could provide the projected range of
services; (3) analyze possible malfunctions, accidents, and interruptions of
electrical services to determine their effect on safe facility operation and on safe
reactor shutdown, and (4) determine if proposed routing and redundancy, if
applicable, of electrical circuits are sufficient to ensure safe reactor operation and
shutdown and to avoid uncontrolled release of radioactive material.
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:
The design bases and functional characteristics of the normal electrical
power systems for the facility have been reviewed, and the proposed
electrical systems will provide all required services
The design of the normal electrical power system provides that in the event
of the loss or interruption of electrical power the reactor can be safely shut
down.
* The design and location of the electrical wiring will prevent inadvertent
electromagnetic interference between the electrical power service and
safety-related instrumentation and control circuits.
NUREG-1537,PART2 8-2 REV 0, 2/96