Document: NRC Regulatory Guide
Document ID: 0b3f08e9-b342-468d-a869-a00f19278ecb
Document Type: regulatory_guide
Title: Normal Water Level and Discharge at Nuclear Power Plants
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740143.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.135
CFR Part: 
CFR Title: 

Content:
to the public methods latory Commission, Washington. D.C. 20555, Attention. Docketing and Service acceptable to the NRC staff of implementing specific parts of the Commission's Branch. regulations, to delineate techniques used by the staff in evaluating specific problems or postulated accidents, or to provide guidance to applicants. Regulatory Guides The guides are issued n the following ten broad divisions are not substitutes for regulations, and compliance with them is riot required 1. Power Reactors 6. Products Methods and solutions different from those set out in the guides will be accept- 2. Research and Test Reactors 7. Transportation able if they provide a basis for the findings requisite to the issuance or continuance 3. Fuels and Materials Facilities 8. Occupational Health of a permit or license by the Commission. 4. Environmental and Siting 9. Antitrust Review B. Materials and Plant Protection tO. Generat Comments and suggestions for improvements in these guides are encouraged at all times, and guides will be revised, as appropriate, to accommodate comments and Requests for single copies of issued guides (which may be reproduced) or for place. to reflect new information or experience. However, comments on this guide,if ment on an automatic distribution list for single copies uf future guides in specific received within about two months after its issuance, will be particularly useful in divisions should be made in writing to the US. Nuclear Regulatory Commision. evaluating the need for an early revision. Washington, D.C. 20555, Attention: Director. Division of Document Control. September 1977 probability of occurrence. As used in this guide, the term normal water level (or discharge) means that water level (or discharge) that has a probability of ap proximately 0.5 of occurrence at the time of interest. Some design basis events may actually consist of a series of events such as an earthluake followed by one or more aftershocks. This fact is important if the