10 CFR 50.46a - Acceptance criteria for reactor coolant system venting systems.

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§ 50.46a Acceptance criteria for reactor coolant system venting systems.

Each nuclear power reactor must be provided with high point vents for the reactor coolant system, for the reactor vessel head, and for other systems required to maintain adequate core cooling if the accumulation of noncondensible gases would cause the loss of function of these systems. High point vents are not required for the tubes in U-tube steam generators. Acceptable venting systems must meet the following criteria:

(a) The high point vents must be remotely operated from the control room.

(b) The design of the vents and associated controls, instruments and power sources must conform to appendix A and appendix B of this part.

(c) The vent system must be designed to ensure that:

(1) The vents will perform their safety functions; and

(2) There would not be inadvertent or irreversible actuation of a vent.

[ 68 FR 54142, Sept. 16, 2003]

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United States Code
Statutes at Large

Title 10 published on 2015-12-04

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR Part 50 after this date.

  • 2017-02-21; vol. 82 # 33 - Tuesday, February 21, 2017
    1. 82 FR 11159 - Uninterruptible Monitoring of Coolant and Fuel in Reactors and Spent Fuel Pools
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      NUCLEAR REGULATORY COMMISSION
      Petition for rulemaking; denial.
      The docket for the petition for rulemaking, PRM-50-113, is closed on February 21, 2017.
      10 CFR Part 50
The section you are viewing is cited by the following CFR sections.

Title 10 published on 2015-12-04.

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  • 2016-12-28; vol. 81 # 249 - Wednesday, December 28, 2016
    1. 81 FR 95410 - Rulemaking Activities Being Discontinued by the NRC
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      Rulemaking activities; discontinuation.
      Effective December 28, 2016, the rulemaking activities discussed in this document are discontinued.
      10 CFR Parts 20 and 50