Document: NUREG-0800
Document ID: 2133c57c-1767-4769-89e9-ceb528fb7c2b
Document Type: srp
Title: RADIOLOGICAL CONSEQUENCES OF STEAM GENERATOR TUBE FAILURE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350149.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.3
CFR Part: 
CFR Title: 

Content:
include limits on the primary and secondary coolant activities which are used in the staff's independent dose calculations (Ref. 3, 4, and 5). If the appli- cant proposes to use these standard limits and the plant is one of the standard NSSS/BOP plants for which the tube failure accident has been evaluated generi- cally with the standard coolant activity and leakage limits, the reviewer need not reevaluate the offsite doses from this accident provided that the atmospheric dispersion factors (X/Q'values) for the site under-review do not 15.6.3-2 Rev. 2 - July 1981 exceed the limiting X/Q values used in the generic review of the standard plant tube failure accident. The review of the steam generator tube failure accident at the OL stage includes the following: 1. Review of the applicant's description of the tube failure accident, with and without offsite power. This includes a review of the sequence of events, the bases for the occurrence, and assurance of an adequate degree of conservatism. 2. Review of the signals available to the reactor operator that indicate the occurrence of the accident and the state of-the system throughout the recovery period. Automatic and required manual operations by the operator as a function of time are reviewed. The AEB reviewer verifies with the RSB the acceptability of the applicant's description of events, including operator actions, to assure that the most severe case has been considered with respect to the release of fission products and calculated doses. 3. The post-accident thermohydraulic characteristics and radiological consequences of-this accident are plant-specific. The reviewer, deter- mines post-accident thermohydraulic profiles and compares these with those presented by the applicant. The purpose of such comparison is not to attain an exact match but to confirm the validity of the applicant's calculated results. 4. The appropriate atmospheric dispersion factors (X/Q values) for the staff's independent dose analysis will