ML20097C970

Proposed Tech Specs Specifying Waste Gas Holdup Sys Hydrogen & Oxygen Monitoring Instrumentation Operability Requirements

ML20097C970
Person / Time
Site:	Three Mile Island
Issue date:	09/11/1984
From:	GENERAL PUBLIC UTILITIES CORP.
To:
Shared Package
ML20097C944	List: ML20097C941 ML20097C953 ML20097C970
References
NUDOCS 8409170334
Download: ML20097C970 (5)

Text

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TABLE 3.21-2 .

RADIOACTIVE GASEOUS PROCESS AND EFFLUENT MONITORING INSTRUMENTATION ,

MINIMUM CHANNELS INSTRUMENT OPERABLE APPLICABILITY ACTION

-1. Waste Gas Holdup System

a. Noble Gas Activity Monitor 1

• • • 25

-(RM-A7)

-b. Effluent System Flow Rate 1 *** 26 Measuring Device (FT-123)  !

2. Waste Gas Holdup System Explosive Gas Monitoring System

a. Hydrogen Monitor 2 ** 30

b. Oxygen Monitor 2 ** 30 i

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l 3-101 8409170334 840911 PDR ADOCK 05000289 PDR P

TABLE 3.21-2 (Continued)

TABLE NOTATION

• At all times

• • During waste gas holdup system operation.

• • • 0perability is not required when discharges are positively controlled 1

through the closure of WDG-V47, and RM-A8 and FT-151 are operable.

ACTION 25 With the number of channels OPERABLE less than required by the Minimum Channels OPERABLE requirement, the contents of the tank may be released to the environment for up to 14 days provided that prior to initiating +.he release:

1. At least two independent samples of the tank's contents are analyzed, and

2. At least two technically qualified members of the Unit staff independently verify the release rate calculations and verify the discharge valve lineup, i- 3. The Operation and Maintenance Director Uait 1 shall approve each release.

! Otherwise, suspend release of radioactive effluent via this pathway.

! ACTION 26 With the number of channels OPERABLE less than required by the

Minimum Channels OPERABLE requirement, effluent releases via this pathway may continue for up to 28 days provided the flow rate is estimated at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

ACTION 27 With the number of channels OPERABLE less than required by the

, Minimum Channels OPERABLE requirement, effluent releases via this pathway may continue for up to 28 days provided grab samples are taken at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and these samples are analyzed for gross activity within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. (See also Specification 3.5.1 Table 3.5-1, Item 3.f).

1 ACTION 30 1. With the number of channels OPERABLE less than required by the Minimum Channels OPERABLE requirement a grab sample shall be collected and analyzed for the inoperable ,

gas channel (s) at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. With both channels inoperable a grab sample shall be collected and analyzed for the inoperable gas channels (s):

(a) at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during degassing operations.

(b) at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> during other operations (e.g. Feed and Bleed).

2. If the inoperable gas channel (s) is not restored to service within 14 days, a special report shall be 4

submitted to the Regional Administrator of the NRC

! Region I Office and a copy to the Director, Office of Inspection and Enforcement within 30 days of declaring the channel (s) inoperable. The report shall describe (a) the cause of the monitor inoperability, (b) action ,

being taken to restore the instrument to service, and (c) action to be taken to prevent recurrence.

3-105 r

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• -'. , o TABLE 3.21-2 (Continued)

TABLE fl0TATI0ft ACTI0tt 31 With .the number of channels OPERABLE less than required by the liinimum Channels OPERABLE requirement, effluent releases via this pathway may continue for up to 28 days, provided, that within four

- hours af ter the channel has been declared inoperable, samples ar'e continuously collected with auxiliary sampling equipment.

l 3-105a

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RADI0 ACTIVE EFFLUENTS EXPLOSIVE GAS MIXTI.RE LIMITING C0f0ITIONS FOR OPERATION 3.22.2.5 The concentration of oxygen in the Waste Gas Holdup System shall be limited to less than or equal to 2% by volume whenever the concentration of hydrogen in the Waste Gas Holdup System is greater than or equal to 4% by volume.

APPLICABILITY: At all times.

ACTION: Whenever the_ concentration of hydrogen ir. the Waste Gas Holdup System is greater than or eaual to 4% by volone, and:

a. The concentration of oxygen in the Waste Gas Holdup System is greater than 2% by voluce, Jut less than 4% by volume, without delay begin to reduce the oxygen concentration to within its limit.

b. The concentration of oxygen in the Waste Gas Holdup System is greater than or equal to 4% by volume, immediately suspend additions of waste gas to the Waste Gas Holdup System and without delay begin to reduce the oxygen concentration to within its limit.

BASES:

Based on experimental data *, lower limits of flammability for i./drogen is 5%

and for oxygen is 5% by volume. Therefore, if the concentration of either gas is kept below its lower limit, the other gas may be present in higher amounts without the danger of an explosive mixture. Maintaining the concentrations cf hydrogen and oxygen such that an explosive mixture does not occur in the waste gas holdup system provides assurance that the release of radioactive materials will be centrolled in conformance with the recuirements of General Design Criterion 60 of Appendix A to 10 CFR 50.

• 8u11entin 503, Bureau of Mines; Limits of Flammability of Gases anc Vapors.

3-116 4

TABLE 4.21-2 ".'

RADIOACTIVE CASEOUS EFFLUENT MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS CilANNEL SOURCE CilANNEL CIIANNEL INSTRUMENT CIIECK CllECK CALIBRATION TEST APPLICABILITY

1. Waste Cas lloldup System

a. Noble Gas Activity-Monitor P P R(3) Q(1) ***

(RM-A7)

b. System Effluent Flow Rate P N/A R .Q ***

Heasuring Dev.ce (FT- 123) 9

2. Waste Gas lloldup System

-p Explosive Gas Monitoring System

a. Ilydrogen Monitor D N/A Q(4) M **

b. Oxygen Monitor D N/A Q(5) M **

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