ML20090F264

Proposed Tech Spec Re Effluent Discharge Monitoring

ML20090F264
Person / Time
Site:	Crane
Issue date:	06/24/1983
From:	GENERAL PUBLIC UTILITIES CORP.
To:
Shared Package
ML20090F253	List: ML20090F250 ML20090F260 ML20090F264
References
NUDOCS 8307050161
Download: ML20090F264 (7)

Text

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Technical Specification Change Request No. 125 The Licensee requests that attached revised pages replace the following

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pages of the existing Technical Specifications.

Replace 3-96, 3-97, 4-88 and 4-99

'II. -Reason for_ Change To transfer the Tech Spec effluent monitoring responsibility f rom RM-L7 to the new monitor RM-L12, which provides better sensitivity for Iodine detection.

The new monitor RM-L12 will be located at the IWTS/IWFS common

' discharge, before the ef fluent is diluted by the flow from Mechanical Draft Cooling Tower, for better detection and resolution.

III.

Safety Evaluation and Justification of Change See Attachment I

.IV.

No Significan't Haz'ard Considerations This monitor (RM-L12) is being provided for efficient radioactive monitoring of liquid effluent from IWTS/IWFS. The monitoring system has the capability to shut off the IWTS/IWFS pumIs on high radiation which provides an alarm in the main control' room, as does monitor malfunction.

Since this modification is an improvement over the previous monitoring system, the proposed amend-ment does'not:

1) involve a significant increase in the probability or consequences of_an accident previously evaluated; or 2) create the possibility of a new or different kind of accident from

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any accident previously evaluated; or

3) : involve a significant reduction in a margin of safety.

V.

Implementation Upon installation of the monitor.

(Expectad dated July '83)

VI.

Amendment Classification (10 CFR 170.22)

This change. request involves a single safety issue and is, therefore.

considered.a class III amendment. A check for S4,000.00 is enclosed.

8307050161 830624 lDRADOCM 05000289

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ATTACHMENT I t

Safety Evaluation and Justification of Change The purpose of the addition of Tech Spec Monitor RM-L12 at t;.2 IWTS/IWFS l

building is to ensure that liquid effluent discharge from IWTc Bldg. to the Susquehanna River are in conformance with levels permitted by 10 CFR 20.

The RM-L12 system will continuously monitor and record the effluent activity prior to being discharged offsite when either the Industrial Waste Treatment (IWTS) or Industrial Waste Filter (IWFS) systems are discharged offsite.

Upon a high activity alarm condition, the IWTS and IWFS pumping will be terminated and an IWTS building trouble alarm will be initiated in the control room.

Local low level alert and high alarms are provided by the nonitor.

'This-monitoring system will not affect the performance of existing industrial waste treatment or industrial waste filter systems except to terminate the discharge pumps in the event of a high radiation condition.

The monitor will be powered from non vital power. This is acceptable because of the fact that treated waste effluent pumps IW-P-16,17, & 18 and IW-P-29 & 30 are not on diesel backed power. Therefore, they will not be able to discharge water on loss of power. However, in case of monitor malfunction, a key locked bypass is provided for administrative 1y controlled effluent dis-charge per tech spec table 3.21-1.

This monitor system addition will not increase the probability of occurrence or the consequences of an accident since it is not an in-line monitor and if a 1" sample tubing were to break, the amount of water released to the operating floor would be small and it would drain back into the IWTS sump. This monitor system will not increase the malfunction of ITS equipment in the area where this monitor is located.

Although this monitor interlock system could cause false tripping of the IWTS and IWFS pumps, these. pumps run on an intermittent basis only and their stoppage will not increase the probability of occurrence or conse-quence of a malfunction ITS or NSR equipment elsewhere in the plant.

This monitor addition increases the margin of safety for the applicable discharge technical specification since the sampling point at which this monitor is detecting the discharge occurs before the discharge effluent is diluted by the mechanical draf t cooling water ef fluent. Monitoring capability is thus enhanced beyond that of the current RM-L7.

In summary, the purpose of the IWTS/IWFS effluent discharge liquid radiation monitor RM-L12 addition is to provide a monitor with a sensitivity range suitable for compliance with 10 CFR 20.

This addition will not increase the.

probability of occurrence or the consequences of an accident or. malfunction of a different type previously identified. It will not decrease the margin of' safety'as defined on-the basis of any technical specification, and reduces the radiological safety concern with relation to contaminated effluent discharge.

F

L INSTRUMENTATION RADIOACTIVE LIOUID EFFLUENT INSTRUMENTATION LIMITING CONDITION FOR OPERATION 3.21.1 The radioactive IJguid ef fluent monitoring instrumentation channels shown in Table 3.2P1 shall be OPERABLE with their alarm / trip setpoints set to ensr a that_the lmits of Specification 3.22.1.1 are not exceeded.

The ALARM / TRIP setpoints of these channels shall be determined to accordance

eith the Offsite Dose Calculation Manual (ODCM).

APPLICABILITY:

At all times

• ACTION:

a.

With a radioactive liquid effluent monitoring instrumentation channel alarm / trip setpoint less conservative then required by the above specification, immediately suspend the release of radio-action liquid effluents monitored by the affected channel or declare the channel inoperable.

b.

With less than the minimum number of radioactive liquid efflent monitoring instrumentation channels operable, take the ACTION shown in Table 3.21.1.

• For FI-84 and RM-L6, operability is not required when discharges are positively controlled through the closure of WDL-V 257.

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• For RM-L12 and associated IWTS/IWFS flow interlocks, operability is not

. g,ga hen g(p4ha g s ge positively controlled through the closure of

• For FT-146, opt rability is not required when discharges are positively controlled through the closure of WDL-V-257, IW-V-72, 75 and IW-V-280,281.

4 BASES:

The radioactive liquid ef flent instrumentation is provided to monitor and control, as applicable,, the releases of radioactive materials in liquid effluents during actual or potential releases. The alarm / trip setpoints for thesa instruments shall be calculated in accordance with NRC approved methods in the ODCM to ensure the alarm / trip will occur prior to exceeding the limits of 10 CFR 20.

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TABLE'3.21-l' i: 0

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RADIOACTIVE-LIQUID EFFLUENT MONITORING = INSTRUMENTATION

..s MINIMUM'

- CilANNELS

I NSTRUMENT.

OPERABLE

' ACTION 1..-Gross' Radioactivity Mon..

w cProviding.AutomatieLTc/?-

4-ion of. Release ~

a.

J Unit 1 Liquid ' Rachade id laamnt 1

18 Line (RM-L6) w.b

.' b.

IWTS/IWFS dincharge line. (RM-L12) 1

- 20

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4 TABLE 3.21-1 (Continued) i ACTION 18 With the number of channels OPERABLE less than required by the Minimum Channels OPERABLE requirement, effluent releases may be resumed for up to 14 days, provided that prior to initiating a release:

1.

At least two independent samples are analyzed in accordance with Specification 4.22.1.1, and; 2.

At least two technically qualified members of the Unit staff independently verify the release rate calculations and verify the discharge valve lineup.

3.

Manager Unit 1 shall approve each release.

Otherside, suspend release of radioactive effluents via this pathway.

ACTION 20 With the number of channels OPERABLE less than required by the Minimum Channels OPERABLE requirements, effluent releases via this pathway may continue for up to 30 days provided that grab samples are collected and analyzed for gross radioactivity (beta and gamma) at a limit of detection of at least 10 i

microcuries/ml, prior to ' initiating a release and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> during release.

ACTION 21 With the number of channels OPERABLE'1 css than required by the Minimum Channels OPERABLE requirement, radioactive effluent releases via this pathway may continue for up to 30 days pro-vided 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 /> during actual releases.

Pump curves may be used to estimate flow.

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TABLE 4'.21-1 s

. RADI0ACrIVi(LIQUID' EFFLUENT MONITORING. INSTRUMENTATION SURVEILLANCE REQUIREMEQS-t^

CllANNEL

~ SOURCE' CilANNEl.

CllANNEL INSTRUMENT}

CilECK CilECK CALIBRATION

_ TEST-li(Radi' activity /Mo[itors-o 1Providing Alarm and Automatic Isolat-ion -

' Unit.I Liquid Radwaste' Effluents Line (RM-L6)

D P-R(3)

Q(1)

- a.

b.

,1WTS/IWFS. discharge line (RM-L12)

D

.P R(3)

Q(1)

, ' 2.R Flow Rate: Monitors 1

a.-

Unit 1 Liquid Radwaste Ef fluent Line (FT-84)

D(4)

N/A R

.Q.

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..m

-b.

Station Effluent < Discharge (FT-146)

D(4)

N/A' R

Q i

1 l

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Table 4.22-1 (Cont'd)

RADIOACTIVE LIQtIID WASTE SAMPLING AND ANALYSIS PROGRAM Liquid Release Type Sampling Frequency Minimum Analysis Type of Activity Lower Limit of Frequency Analysis Detection (LLD)

(pCi/ml) a W

C c

A.2 Continuous e Continuous Composite PrincipalGa7ma 5x 10~7 Rejenses Emi t te r'sP>

I-131 1 x_10' '

-5 M

M Dissolved and 1 x 10 n raine ases CRAB Sample (f,amma emit t e rs)

M I

Continuous Composite 11-3 1 x 10 e

c

-5

~7 Gross alpha 1x 10 c

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Continuous Q

Sr-89, Sr-90 5 x 10~

c Composite

~ I' Fe-55 1 x 10

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l'-32 1 x 10

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