ML20215F396

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Rev 0 to 1PCP08-AP-0009, Sampling & Analysis for Release Assessment - Post-Accident
ML20215F396
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 09/22/1986
From: Kinsey W
HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20215F286 List:
References
RTR-NUREG-0737, RTR-NUREG-737 1PCP08-AP-0009, 1PCP8-AP-9, NUDOCS 8610160189
Download: ML20215F396 (7)


Text

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. FOR INFORMATION ONLY IIOUSTON LIGHTING AND POWER COMPANY SOUT!! TEXAS PROJECT ELECTRIC GENERATING STATION PLANT PROCEDURES MANUAL STATION PROCEDURE NON SAFETY-RELATED (Q)

Sampling and Analysis.for Release IPCP08-AP-0009 Assessment - Post Accident Rev. O Page 1 of 8 APPROVED: kM. %33-%

DATE APPROVED 9c4C9C DATE EFFECTIVE PLANT MANAGER Q '

1.0 Discussion

1.1 Purpose and Scope

1.1.1 The purpose of this procedure is to establish the steps necessary to quantify the activity released from the plant under accident conditions in a safe and ef ficient manner.

1.1.2 The type of activity releases considered in this procedure are:

1.1.2.1 Unit Vent 1.1.2.2 Condenser Vacuum Pump 1.1.2.3 Main Steam Line Power Operated Relief Valves (PORV) 1.1.3 The data obtained from the sample analysis will be provided to the RMS computer for dose assessment.

1.2 Definitions 1.2.1 POST ACCIDENT SAMPLING SYSTEM (PASS): A syctem composed of various components that provides the capability to obtain Reactor Coolant System and Containment Atmosphere samples and perform required analyses under Post Accident conditions within 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> from the time a decision is made to sample.

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Sampling and Analysis for Release IPCP08-AP-0009 Assessment - Post Accident Rev. O Page 2 of 8 1.2.2 RADIATION MONITORING SYSTEM: The plant system that monitors, quantifies and reports the plant radioactive releases for dose assessment.

1.3 Principle 1.3.1 Samples are obtained from the system making the abnormal release so that a representative isotopic mix may be dete rmined. The isotopic mix is then used to estimate the offsite dose to the public. Determining the release rate during abnormal conditions may mean obtaining samples f rom secondary sources, such as the containment or reactor Coolant.

1.4 Limitations 1.4.1 Only samples from the accident release point need to be obtained.

1.4.2 The samples are listed in order of preference, as the first sample source listed would be the most representative of the actual release rate.

2.0 Prerequisities 2.1 The gamma analysis detection system shall have a current calibration.

3.0 Precautions 3.1 Sample collection, preparation, transport and analysis will be performed under applicable Radiation Work Permits.

3.2. Samples and sample areas may have high dose rates dae to accident conditions. The choice of the sample (s) taAen will be determined by the Health and Safety Services Division.

3.3 Follow the Laboratory Safety Practices of OPCP01-ZA-0017 (Post Accident Sampling and Analysis Program) to minimize personnel dose.

4.0 Procedure 4.1 Obtain a Radiation Work Permit in accordance with OPGP03-ZR-0002 (Radiation Work Permit).

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Sampling and Analysis lor Release IPCP08-AP-0009 Assessment - Post Accident Rev. 0 Page 3 of 8 4.2 Unit Vent Sampling 4.2.1 Obtain, as needed, one of the following samples in ac'cordance with the listed procedure. Record the sample point, time and date on the Post Accident Release Assessment Data Sheet (-1).

a. Unit Vent, OPCP07-ZS-0016 (Collection of Particulate and Iodine Samples)
b. Containment Atmosphere, OPCP07-ZS-0016 (Collection of Particulate and Iodine Samples)
c. Containment Atmosphere - Post Accident, IPCP08-AP-0004 (Sampling and Analysis of the RCB Atmosphere - Post Accident) 4.2.2 Obtain, as needed, the following data and record on Post '

Accident Release Assessment Data Sheet (- 1 ) .

a. Unit Vent Flow Rate - CFM (Unit Vent sample only)
b. Containment Purge Rate - CFM (Containment Atmosphere samples only)
c. Air Sample Flow Rate - (CFM)
d. Sample collection time 4.3 Condenser Sampling 4.3.1 Obtain, as needed, one of the following samples in accordance with the listed procedure. Record the time and date on the Post Accident Release Assessment Data Sheet (-1).
a. Condenser Vacuum Pump Discharge, OPCP07-ZS-0016 (Collection of Particulate and Iodine Samples).
b. Main Steam Sample, IPCP07-ZS-0001 (Sampling at Secondary Sample Panel ZLP-132).
c. Reactor Coolant Sample, (RCS) IPCP07-ZS-0001 (Sampling at Primary Sample Panel ZLP-131 Reactor Grade Sinks).
d. Reactor Coolant Sample - Post Accident IPCP08-AP-0003

. (Sa,npling and Analysis of RCS, Ri!R, and RGB Sump - Post Accident).

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Sampling and Analysis 'ar Release IPCP08-AP-0009 Assessment - Post Accident Rev. O Page 4 of 8 4.3.2 Obtain, as needed, the following data and record on the Post Accident Release Assessment Data Sheet (-1).

a Condenser Vacuum Pump Flcw Rate - CFM (Condenser Vacuum Pump sample only).

b. Main Steam Flow - lbs/Hr (Main Steam Sample only).
c. Primary to Secondary Leak Rate - gal / min (Reactor Coolant sample and Main Steam Samples).
d. Air Sample Flow Rate (Condenser Vacuum Pump and Main Steam)
e. Saiple Collection Time (Condenser Vacuum Pump and Main Steam) 4.4 Main Steam Line PORV 4.4.1 Obtain, as needed, one of the following samples in accordance with the listed procedure. Record the time and date on the Post Accident Release Assessment Data Sheet (-1).
a. Main Steam Sample IPCP05-ZS-0016 (Sampling at Secondary Sample Panel ZLP-132) .
b. Reactor Coolant Sample IPCP07-ZS-0001 (Sampling at Primary Sample Panel ZLP-131 Reactor Grade Sample Sink). 2
c. Reactor Coolant Sample - Post Accident IPCP08-AP-0003 (Sampling and Analysis of the RCS, RHR, RCB Sump - Post Accident).

4.4.2 Obtain, as needed, the following data and record on the Post Accident Release Assessment Data Sheet (-1).

a. Main Steam Flow - lbs/Hr (Main Steam Sample only).
b. Primary to Secondary Leak Rate - gal / min (Reactor Coolant Sample and Main Steam Sample).
c. Air Sample Flow Rate - (CFM)
d. Sample Collection Time 4.5 Calculate the air sample volume following equation in section 5.1 or use the sample liquid mass for the sample analyzed.

Sampling and Analysis f or Release IPCP08-AP-0009 Assessment - Post Accident Rev. O Page 5 of 8 4.6 Analyze the sample for activity in accordance with the appropriate procedure.

4.6.1 IPCP08-AP-0005 (Determination of Radionuclide - Post Accident).

4.6.2 OPCP09-ZR-0004 (Determination of Radionuclide by Gamma Spectroscopy).

4.7 Calculate the sample activity (in uCi/ml or uCi/ gram) using the equation in section 5.2 for each radionuclide. .+

4.8 Release Rate Calculations 4.8.1 Calculate the release rate using the equation in section 5.3 for samples collected in steps 4.1.1.a, 4.1.1.b, 4.1.1.c, 4.2.1.a, and 4.3.1.a f or each nuclide.

4.8.2 Calculate the release rate using the equation in section 5.4 and 5.5 for samples collected in steps 4.2.1.c, 4.2.1.d, 4.3.1.b, and 4.3.1.c.

4.9 Record the results of step 4.8 on Data Sheet (-1).

4.10 Sign and date the Data Sheet (-1). Send the Data Sheet to the Lead Chemical Technician for review and signature.

4.11 Forward the release rate data to Health and Safety Services for dose calculations.

5.0 Calculations 5.1 Air Sample Volume Vol (cc) = SFR x T x 2.83E4 where:

SFR = Air Sample Flow Rate (CFM)

T = Sampling Time (min) 2.83E4 = Cubic centimeters per cubic foot 5.2 Sample Activity Nuclide Activity (uC1)

Activity (uCi/cc or g) = --------

. Sample mass or volume (cc or g)

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Sampling and Analysis for Release IPCP08-AP-0009 Assessment - Post Accident Rev. O Page 6 of 8 5.3 Nuclide Release Rate (Step 4.8.1)

Nuclide Release Rate (uCi/sec) = A x PSF x 2.83E4 x 0.0167 where:

A = Nuclide Activity (uCi/cc)

PSF = Process Steam Flow (CFM) 2.83E4 = Cubic centimeters per cubic foot-0.0167 = Minutes per second 5.4 Nuclide Release Rate (Step 4.8.1) - Noble Gases (A x LR x 3785)

Nuclide Release Rate (uCi/sec) =

60 where:

A = Nuclide Activity (uCi/cc)

LR = Priraary to Secondary Leak Rate (gal / min) 3785 - Cubic centimeters per gallon 60 = Seconds per minute 5.5 Nuclide Release Rate (Step 4.8.1) - Iodines (A x LR x 3785 x 0.01)

Nuclide Release Rate (uci/sec) =

60

vhereY A = Nuclide Activity (uC1/cc)

LR = Primary to Secondary Leak Rate (gal / min) 3785 = Cubic Centimeters per gallon 60 = Seconds per minute 0.01 = Estimated Iodine Fractional Carryover of Iodine in Steam

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Sampling and Analysis for Release IPCP08-AP-0009 Assessment - Post Accident Rev. O Page 8 of 8 RELEASE ASSESSMENT DATA SHEET IPCP08-AP-0009-1 (Page 1 of 1)

Unit Condenser SG Vent _ Vacuum Pump PORV Sample Date Sample Time Process Flow Rate (CFM)

Primary to Secondary Leak Rate (gal / min)

Air Sample Flow Rate (CFM)

Sm1ple Collection Time (Min)

Nuclide Nuclide Activity Release Rate uCi/cc or gr uCi/sec Noble Gases Kr-83m Kr-85 Kr-85m Kr-87 Kr-88 Xe-131m Xe-133 Xe-133m Xe-135 Iodine I-131 1-132 1-133 I-134 1-135 Performed By : Date :

Reviewed By  : Date :

This form, when completed, shall be retained for the . life of the plant. ,' .

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