ML19329B872
| ML19329B872 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 10/21/1976 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19329B868 | List: |
| References | |
| NUDOCS 8002060877 | |
| Download: ML19329B872 (1) | |
Text
m OCT 211976 RADIOACTIVE EFFLUENTS GAS ANALYZERS LIMITING CONDITION FOR OPERATION Primary waste gas holdup system components shall not contain 2.4.2.6 explosive gas mixtures.
APPLICABILITY: ALL MODES ACTION:
For systems designed to withstand a hydrogen explosion, the gas l
monitor shall alarm, both locally and in the control room, at a a.
8 If the hydrogen set point of 4% by volume of hydrogen or oxygen.
or oxygen concentration reaches the set point, action shall be taken to reduce the concentration below 4% by volume of hydrogen If the gas monitor or alarm is in-or oxygen within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.
operable, gas samples shall be taken and analyzed each 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during offgas system operation, and the instrument shall be made operable within two weeks or the primary waste gas holdup system shall not be operated.
For systems not designed to withstand a hydrogen explosion, tne b.
automatic control features to prevent potentially-explosive gas mixtures in the system components, shall be initiated by either of two independent gas monitors and both shall ala.m locally and in the control room at the set points of 2% and 4% by volume of hydrogen and/or oxygen; or if the automatic control features fail to be actuated when either set point is reached, immediate action shall be taken to reduce the hydrogen or oxygen concentration to If either gas monitor or any alarm is inoperable, safe levels.
gas samples shall be taken and analyzed each 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during offgas system operation; and if the instrument can not be made operable within two weeks the primary waste gas holdup system shall not be j
If the automatic control features to prevent potentially-operated.
explosive gas mixtures are inoperable and cannot be made operable within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, the primary waste gas holdup system shall not be operated.
SURVEILLANCE REOUIREMENTS All gas analyzers shall have daily sensor checks, monthly func-l 2.4.2.6-1 tional tests, and quarterly calibration by an appropriate gas mixture l
Any automatic control features to prevent potentially-explosive l
l source.
mixtures shall have a monthly functional test.
2.4-20 8002060h