Document: NUREG-0800
Document ID: 9f13abda-ee55-4fa1-8276-db55ac2094ef
Document Type: srp
Title: CONTROL ROOM HABITABILITY SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070449.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.4
CFR Part: 
CFR Title: 

Content:
er unit and with respect to ensuring that such sharing will not significantly impair the ability to perform safety functions including, in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining unit(s). cC. General Design Criterion 19 (GDC 19), "Control Room," as it relates to 21 maintaining the control room in a safe, habitable condition under accident conditions by providing adequate protection against radiation and toxic gases. The specific criteria necessary to meet the relevant requirements of General Design Criteria 4, 5, and 19 and to assureensure that the control room habitability requirements and positions of 10 CFR 50.34(f)(2)(xxviii) (for those applicants subject to 10 CFR 50.34(f)) and Item III.D.3.4 of NUREG-0737 are met are as follows: 22 1. Control Room Emergency Zone The control room emergency zone should include the following: a. Instrumentation and controls necessary for a safe shutdown of the plant, i.e., the control room, including the critical document reference file; b. Computer room, if it is used as an integral part of the emergency response plan; c. Shift supervisor's office; and d. Operator washroom and the kitchen. 2. Ventilation System Criteria The ventilation system should include the following design features: is reviewed by ASB under SRP Section 9.4.1, "Control Room Area Ventilation System." The AEB reviewer ascertains from the ASB if the following system performance and availability criteria are met:23 a. Isolation dampers - dampers used to isolate the control zone from adjacent zones 24 or the outside should be leaktight. This may be accomplished by using low leakage dampers or valves. The degree of leaktightness should be documented in the SAR. b. Single failure - aA single failure of an active component should not result in loss 25 of the system's functional performance. All the components of the control room emergency filter train should be considered active components. See Appendix A to this SRP