ML20137V903

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Rev 1 to Emergency Implementing Procedure 62RP-RAD-009-05, Airborne Radioactivity Concentration Determination
ML20137V903
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 12/05/1985
From: Sorrell E
GEORGIA POWER CO.
To:
NRC OFFICE OF ADMINISTRATION (ADM)
References
62RP-RAD-009-05, 62RP-RAD-9-5, LR-ADM-003-1285, LR-ADM-3-1285, NUDOCS 8512100120
Download: ML20137V903 (7)
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Text

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. GEORGIA POWER COMPANY l DOCUMENT TYPE: l PLANT E.I. HATCH I RADIATION PROTECTION l PAGE 1 0F 6 DOCUMENT TITLE: l DOCUMENT NUNBER: l REVISION NO:

m AIRBORNE RADIOACTIVITY CONCENTRATION DETERMINATION l 62RP-RAD-009-OS I 1 EXPIRATION DATE: l APPROVALS: ., / ,

l EFFECTIVE DATE:

l DEPT. MGR. ld42MA , DATE .shi!fi l'M/fN GEN. MGR. W 1444- DATE ft '

  1. //

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1.0 OBJECTIVE To establish a method for taking air samples and determining the concentration of airborne radioactivity.

2.0 APPLICABILITY This procedure applies to HP/ Chemistry personnel who would take and/or count an airborne sample,

3.0 REFERENCES

3.1 Helgeson " Determination of Concentrations of Airborne Radioactivity," Health .

Physics, Vol. 9, 1963, pp. 931-942. TDC #0502.

3.2 60AC-HPX-006-05 Respiratory Protection Program 4.0 REQUIREMENTS 4.1 PERSONNEL REQUIREMENTS Personnel should be trained in the use of the selected air sampler and the use of the HP Well Counter.

4.2 MATERIAL AND EQUIPMENT 4.2.1 Selected air sampler 4.2.2 Appropriate filter media 4.3 SPECIAL REQUIREMENTS N/A - not' applicable to this procedure

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fm FkkIhCK20 050003851205 2 O ""

Q4C f MGR-0002 Rev. 2

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GEORGIA POWER COMPANY l l PLANT E.I. HATCH l l PAGE 2 0F 6 DOCUMENT TITLE: l DOCUMENT NUMBER: l REVISION N0: ~

AIRBORNE RADI0 ACTIVITY CONCENTRATION DETERMINATION I 62RP-RAD-009-0S l 1 5.0 PRECAUTIONS / LIMITATIONS 5.1 PRECAUTIONS . .

N/A - not applicable to this procedure 5.2 LIMITATIONS N/A - not applicable to this procedure 6.0 PREREQUISITES N/A - not applicable to this procedure f

7.0 PROCEDURE 7.1 GENERAL Although the plant is designed to operate within the limits set forth for airborne activity by 10 CFR 20, there is a possibility that some event may'cause a release of airborne radioactivity to the immediate local plant environment.

Such an occurance could be the result of routine operations or maintenance; for example, welding, grinding or opening a system to tlie atmosphere. In order to increase protection to plant personnel, routine air samples will be taken in O conjunction with area radiation surveys and when any operation or maintenance work is being performed on radioactive material on systems where loose radioactive material may be present.

7.2 DATA ANALYSIS

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Due to naturally occurring Radon and Thorium gases in the atmosphere and their particulate daughters being carried directly or indirectly on dusts, air samples normally show significant activity from these isotopes alone. Radon daughters, whose longest half-life is 30 minutes, may be considered as completely decayed four hours af ter completion of sampling. Thoron daughters, whose longest half-life is 10.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, will take approximately 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to be considered completely decayed. It is seen, therefore, that for the measured count rate i

without regard to the delay time between stopping and counting the sample, will give highly variable results.

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MGR-0001 Rev. 1

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PLANT E.I. HATCH l l PAGE 3 0F 6 DOCUMENT TITLE: l DOCUMENT NUMBER: l REVISION NO:

AIRBORNE RADI0 ACTIVITY CONCENTRATION DETERMINATION I 62RP-RAD-009-OS l I- E I .

l l l Where an emergency exists, the concentration of l l activity of the contaminant is well above normal l l background trends and can be readily recognized. l 7.2.1 Long lived activity can be estimated by counting the sample four hours af ter sampling (count C1 ) and again 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> af ter sampling (count C2 ). The -

estimated long lived activity count rate (C LLi n counts / min) may then be determined from the following formula:

CLL = C2 - 0.271 Ci 0.729 The use of this formula imposes a delay in obtaining data on the concentration of activity immediately. Therefore, for routine operations the filter samples will be counted immediately af ter collection and the air contamination estimated, assuming all counts on the filter are due to the contaminant.

O 7.2.2 When air samples are taken and the concentrations are used to set stay times for MPC hours for personnel, then if the results are greater than or equal to 2.0 X 10-9 uci/cc, the sample activity should be identified for specific radionuclides. A decay count may be conducted to determine if the sample half-life is k two hours. The sample may also be recounted at four and twenty four hours for further evaluation.

7.3 Install a 2" diameter glass fiber filter, by removing the outer ring and placing the filter paper over the cross-grid support. Where radioiodine or gases are suspected to be present, install a charcoal cartridge in addition to the glass fiber filter.

7.4 Replacef the outer ring by threading clockwise until seal is made between the outer ring, filter paper, and the "0" ring seal.

7.5 Carry the unit to the designated air sampling location and plug into a 115 VAC outlet. .For locations where 115 VAC is unavailable, a battery operated sampler may be used. .

O N6R-0001 Rev. I I

PLANT E.I. HATCH I l PAGE 4 0F 6

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DOCUMENT TITLE: l DOCUMENT NUMBER: l REVISION NO:

AIRBORNE RADI0 ACTIVITY CONCENTRATION DETERMINATION 1 62RP-RAD-009-OS I 1 i

1 i

i l NOTES l

. t l l Always try to obtain a breathing zone air sample l ,

4 l if possible. l l l Do not lay air samplers on the floor. l I

l Do not tie off air samplers with the power cord. l

  • i l Use a rope to tie off the air sampler. l l Survey the air sampler and cord upon completion l ,

l of sampling. l .,

l Attach the " HASP" printout to Attachment 2 if l l needed. l l Air samples drawn with a charcoal shall be drawn l l at no greater rate than 3 CFM. l 7.6 Turn on the air sampler. .

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7.7 Record the applicable information on an Air Sample Envelope (shown in '

! Attachment 1) or other suitable container.

q 7.8 Turn of f the air sampler af ter a minimum time of: i 15 minutes - Low volume air sampler (Eberline) j 15 minutes - Low volume air sampler (Radeco at 3 cfm) i 7.9 Remove filter and place in Air Sample Envelope or other suitable container. Take

} to laboratory for counting.

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!' 7.10 Count the charcoal sample for a minimum of 2 minutes and the paper filter for a --

minimum of 5 minutes and note the total counts on the Portable Air Sample Log shown on Attachment 2.

7.11 Transfer all data from the air sample envelope to the Portable Air Sample Log.

Be specific about sample point location.

i 7.12 Calculate"the activity using the appropriate equation and data on Attachment 2.

7.13 If the results of the particulate filter exceeds 25% of the MPC for unidentified ,

air concentrations or 2.0 X 10-9 uC1/cc for all radioactivity, also if the results of the charcoal cartridge exceeds 25% of the MPC for unidentified air ,

concentration's or 2.0 X 10-9 uC1/cc for all radioactivity, the Health Physics Supervisor or his designated alternate should be notified immedir.tely. The particulate filter and charcoal cartridge will be counted tcgether using GeLi detectors to sum the total MPC values and to identify each radionuclide present.

7.14 The results may then be further evaluated as determined necessary by the Health ,

Physics Supervisor, or his designated alternate.

i' MGR-0001 Rev. 1 _ ,

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. GEORGIA POWER COMPANY l l PLANT E.I. HATCH l l PAGE 5 0F 6 DOCUMENT TITLE: l DOCUMENT NUMBER: l REVISION NO:

cs AIRBORNE RADI0 ACTIVITY CONCENTRATION DETERMINATION l 62RP-RAD-009-OS l 1

( ATTACHMENT 1 l ATTACHMENT PAGE:

1 TITLE: AIR SAMPLE ENVELOPE I 1 0F 1 AIR SAMPLE ENVELOPE -

AIR SAMPLE Sample Location: l UNIT NO l Date l l Sample Conditions:

Sample Taken By:

Sampler Type: l l High Volume l l Planchet l l Low Volume Collector: l l Filter Paper l l Stack l l Charcoal Sample Name l Collection Time: l Monitor Reading l l Date l Time l 1 l l l O Flow Rate l ON l 1 l V I I l 1 Remarks l OFF l l l O

MGR-0009 Rev. I

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  • GEORGIA POWER COMPANY l l PLANT E.I. HATCH l l PAGE 6 0F 6 DOCUMENT TITLE: l DOCUMENT NUMBER: l REVISION NO:

/^T AIRBORNE RADI0 ACTIVITY CONCENTRATION DETERMINATION I 62RP-RAD-009-05 l 1

'd ATTACHMENT 2 l ATT/.CHMENT PAGE:

1 TITLE: AIR SAMPLE CALCULATION SHEET l 1 0F 1 UNIT # DATE / /

SAMPLE SAMPLE LOCAil0N TIME (CSTJ, (2) SAMPLE FLOW RATE VOLUME COLLECTED STAY TIME NO. ON OFF TIME (MIN) (CFM OR LPM) (FT OR L) BY HOURS

1. ELEY RWPJ -
TIME TOTAL MIN BKG NET ACTIVITY CALC MPC MPC MPC MPC COUNTING OATA SCALER (CST) COUNT CTD CPM CPM [FF. uC1/cc BY RATIO INERT RATIO RATIO INIT IODINE GASSES PART. TOTAL GROSS BETA GROSS IODINE GROSS ALPHA SAMPLE SAMPLE LOCATION TIME (CST) (2) SAMPLE FLOW RATE VOLUME COLLECTED STAY TIME NO. ON OFF T!ME (MIN) (CFM OR LPM) (FT OR L) BY HOURS
2. ELEV RWP#

TIME TOTAL MIN BKG NET ACTIVITY CALC MPC MPC MPC MPC COUNTING DATA SCALER (CST) COUNT CTO CPM CPM EFF. uC1/cc BY RATIO INERT RATIO RATIO INIT IODINE GASSES PART. TOTAL GROSS BETA GROSS IDDINE GROSS ALPHA I SAMPLE SAMPLE LOCATION TIME (CST) (2) SAMPLE FLOW RATE VOLUME COLLECTED STAY TIME w/ NO. ON OFF TIME (MIN) (CFM OR LPM) (FT OR L) BY HOURS

3. ELEV RWP#

TIME TOTAL MIN BKG NET LCTIVITY CALC MPC MPC MPC MPC C0JNTING DATA SCALER (CST) COUNT CTO CPM CPM EFF. uC1/cc BY RATIO INERT RATIO RATIO INIT IODINE GASSES PART. TOTAL GROSS 8 ETA GROSS IODINE -

GROSS ' ALPHA SAMPLE ' SAMPLE LOCATION TIME (CST) (2) SAMPLE FLOW RATE VOLUME COLLECTED STAY TIME ~

NO. ON OFF TIME (MIN) (CFM OR LPM) (FT OR L) BY HOURS

4. ELEY RWPJ TIME TOTAL MIN BKG NET ACTIVITY CALC MPC MPC MPC MPC COUNTING DATA SCALER (CST) COUNT CTD CPM CPM EFF. uC1/cc BY RATIO INERT RATIO RATIO INIT IODINE GASSES PART. TOTAL GROSS BETA

. GROSS IODINE GROSS ALPHA CALCULATIONS FOR DERIVING ACTIVITY IN uC1/cc (2) MINIMUM SAMPLE TIME: LOW VOLUME PARTICULATE LOW VOLUME CHARCOAL (a) Eberline LV 15 minutes (NET CPM) (4.5 X 10-10) (NET CPM) (4.5 K 10-10)

(b) Radeco: 15 min. at 3 cfm (VOLUME IN LITERS) (EFF) (VOL. IN LITERS) (EFF) (.999)

A NOTE: Man, sample rate when using charcoal is 3 cfm.

3 cfm = 85 Lpm HPX-0213 Rev. O MGR-0009 Rev. I

l. Georgin Power Comp:ny J. Post Offics 8:x 439 j , ,hl:y, Georgis 31513 Telephone 912 367-7781 912 537-9444 i

GeorgiaPbwer i Edwin I. Hatch Nuclear Plant i

December 5, 1985 LR-ADM-003-1285 PLANT E. I. HATCH Emergency Implementing Procedures Docket Nos. 50-321/50-366 Document Control Desk United States Nuclear Regulatory Commission Washington, D.C. 20555 l

l Gentlemen:

Pursuant to Appendix E,Section V of 10 CFR 50, please find enclosed two l (2) copies of the latest revisions to the Plant E.I. Hatch Emergency Impic.menting Procedures. Three (3) copies of these procedures are also being l forwarded to the Region II office in Atlanta, Georgia.

l E. C. Sorrell Document Control Supervisor ECS/klm xc: U.S.N.R.C./ Region II w/3 l J.P. O'Reilly/GPCo w/0 file i'

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