scope:

This standard specifies actions that the owner of a nuclear power plant should take in the event of an earthquake. The requirements of this standard supplement those given in American National Standard Criteria for the Handling and Initial Evaluation of Records from Nuclear Power Plant Seismic Instrumentation,ANSI0ANS-2.10- 2003 [1]¹ The application of these standards provides a complete evaluation of the need for postearthquake plant shutdown in a timely manner. This standard also provides guidelines that will enable the owner to develop plant-specific procedures for determining the condition of components, systems, and structures needed for shutdown and criteria for restart when a nuclear power plant is required to shut down following an earthquake.

This standard does not cover those operator actions performed in connection with the operation and control of the nuclear power plant following an earthquake. These actions are specified in plant operating procedures, emergency operating procedures, and alarm response procedures.

Purpose

The purpose of this standard is to describe actions to be taken in preparation for, and following, a felt earthquake at a nuclear power plant. This standard will assist nuclear plant personnel in the preparation of detailed plant-specific earthquake response procedures. The earthquake response procedures will help determine and document:

• The effects of an earthquake on the physical condition of the nuclear power plant;

• If shutdown of the plant is warranted, based on ground motion recordings and observed damage to the plant;

• The readiness of the plant to shut down, if shutdown is required due to an earthquake; and

• The readiness of the plant to resume operation following shutdown due to an earthquake.

¹Numbers in brackets refer to corresponding numbers in Section 9, References