Daily Rules, Proposed Rules, and Notices of the Federal Government
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The NRC is issuing for public comment a draft guide in the NRC's “Regulatory Guide” series. This series was developed to describe and make available to the public such information as methods that are acceptable to the NRC staff for implementing specific parts of the NRC's regulations, techniques that the staff uses in evaluating specific problems or postulated accidents, and data that the staff needs in its review of applications for permits and licenses.
The draft regulatory guide entitled “Preoperational Testing of On-Site Electric Power Systems to Verify Proper Load Group Assignments, Electrical Separation, and Redundancy” is temporarily identified by its task number, DG-1294. The DG-1294 is proposed Revision 1 of Regulatory Guide 1.41, “Preoperational Testing of On-Site Electric Power Systems to Verify Proper Load Group Assignments, Electrical Separation, and Redundancy” dated March 1973.
Regulatory Guide 1.41 was developed to provide guidance on preoperational testing of on-site electrical power systems important to safety for load group assignments, electrical separation, and redundancy. The guide was first issued in 1973 and has not been revised despite multiple revisions to the underlying regulations. Since 1973 the Commission has amended its regulations for loss of all alternating current power (Station Blackout) and loss of large areas of the plant due to explosions or fire, and has established a new combined (construction and operating) licensing process under 10 CFR part 52.
This regulatory guide is being revised for three reasons: (1) To expand the scope of the guide to encompass preoperational tests for the electrical power systems used to meet the regulatory requirements addressing Station Blackout and loss of large areas of the plant due to explosions or fire; (2) to expand the scope of the guide to encompass testing the ability to meet time requirements for startup and alignment for use of electric power sources used to meet the regulatory requirements addressing Station Blackout and loss of large areas of the plant due to explosions or fire and (3) to update the guide references and address facilities licensed under 10 CFR part 52.
As discussed in the “Implementation” section of this regulatory guide, the NRC has no current intention to impose this regulatory guide on holders of current operating licenses or combined licenses. Accordingly, the issuance of this regulatory guide would not constitute “backfitting” as defined in 10 CFR 50.109(a)(1) of the Backfit Rule or be otherwise inconsistent with the applicable issue finality provisions in 10 CFR part 52.
This regulatory guide may be applied to applications for operating licenses and combined licenses docketed by the NRC as of the date of issuance of the final regulatory guide, as well as future applications for operating licenses and combined licenses submitted after the issuance of the regulatory guide. Such action would not constitute backfitting as defined in 10 CFR 50.109(a)(1) or be otherwise inconsistent with the applicable issue finality provision in 10 CFR part 52, inasmuch as such applicants or potential applicants are not within the scope of entities protected by the Backfit Rule or the relevant issue finality provisions in Part 52.
For the Nuclear Regulatory Commission.