scope:

This standard defines calculational requirements and discusses measurement techniques for estimates of dose rates near light water reactor (LWR) nuclear power plants because of direct and scattered gamma rays from contained sources on-site. On-site locations outside plant buildings and locations in the off-site unrestricted area are considered. All sources that contribute significantly to dose rates are identified and methods for calculating the source strength of each are discussed. Partic ular emphasis is placed on ¹⁶N sources as they are significant sources of direct and scattered radiation for boiling water reactors (BWRs). The standard specifically excludes radiation from gaseous and liquid effluents. The standard describes the considerations necessary to compute dose rates, including component self-shielding, shielding af forded by walls and structures, and scattered ra diation. The requirements for measurements and data interpretation of measurements are given. The standard includes normal operation and shut down conditions but does not address accident or normal operational transient conditions. The standard also applies to the gamma dose resulting from dry fuel storage facilities.