ML20128P694
| ML20128P694 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 01/08/1993 |
| From: | LONG ISLAND POWER AUTHORITY |
| To: | |
| Shared Package | |
| ML20128P641 | List:
|
| References | |
| 67X001.09, 67X1.09, NUDOCS 9302250077 | |
| Download: ML20128P694 (9) | |
Text
{{#Wiki_filter:- . . . .- _____.___ _ ____ SP Number _ 6M001. 09 Revision 1 P er D Apv1 Level, D Effective Date / " I- 13 Number of Pages 3 Section Head . _ _ _ [N'4D #/7 43 1. . Quality Contr MT/f .7 2. D,1v Mgr _
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3 .. Dept Mgr N/A 4 Resident Mgr N/A 5. Signature or N/A Date TPC No Effective Expiration Date of TPC Date of TPC TERMINATION SURVEY BACKGJtOUND ASSESSMENT 1.0 PURPOSE This procedure defines the method for determining backgroun1 radiation levels for the Shoreham Decommissioning Termination Survey and documentation of the determination. 2.0 ILESPONSIBILITY 2.1 The Termination Survey Section Head is responsible for the content'and implementation of this procedure. 2.2 The rermination Survey Engineer and Termination Survey Section Radiological Engi sers are responsible for the collection of background radiation data and the establishment of background radiation values to be used in calculating net contamination and radiation levels. 2.3 Health Physics Technicians will perform the data collection and Termination Survey Radiological Engineers will perform administration and calculations O required by this procedure. SR2-1021.600 6.4.21 j qp T 1 aa(bqpq9p nid ud _ FEB 23 1993 Jgg22}g8M $8$ 2 W _ - - _ - _ _ _ - _ _ - _ _ _ _ _ _ _ _ _ -
I3.0- : DISCUSSION 3.1. The relpase criteria'for-the'Shoreham Nuclear Power Station (SNPS) facility (Referencer. 11.1)-are established as levels above the nrturally occurrings
/ background.
3,2 It is necessary to determine the site-background levels to enable a, comparison of site radiological conditions with the acceptable release criteria limits. 3.3 The. principal' purpose'of background measurements ~ described;in this procedure 1
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is to establish the reference background- mean value for ~each type of instrument / detector-used in the Termination Survey, 3.4 . Background is determined by measurements and/or sampling taken.on site land:in the immediate vicinity.of the site (out to several kilometers-from the site' boundary), which are unaffected by site operations.
.3.5 This procedure will establish the methods for collecting background. data for:
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portable field-instruments and detectors, Laboratory: instrument background is determined in accordance with Individual counting instrument-operating procedures. 4.0 PRECAUTIONS N/A 5.0 PREREQUISITES L 5.1 Health Physics Technicians using this procedure shall:have'successfully
] completed the Termination Survey Training course and be qualified to operate the instruments referenced in this procedure.
5.2 One or more off-site locations have been identified and are available for; background measurements. 5.3 -On-site locations have been identified which are' determined'to be free of-detectable radiation from non background sources.
.6.0 LIMITATIONS AND ACTIONS ~
N/A 7.0 TEST EOULPPENT 7.1 Eberline ESP 2 Scaler /Ratemeter with: 1 j_ .1 Eberline HP-260' Pancake G-M detector or. equivalent; L .2 Aptec FT126BH Large Area C-M detector. Aptec FT252BH.Large Area G-M' detector.
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.3 _ .
a
.4 .Aptec Floor-Monitor with three FT252 Large Area G-M detectors.
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.5 Eberline AC3 7 Alpha Scintillation detector, q
7.2 Bicron Micro Rem meter. (pRem meter)
..y SP 67X001.09 Rev. 1 l Page=2-7 L
7.3 Reuter Stokes Pressurized Ion Chamber._(PIC)- l 7.4 Niton RAD 7 Radon Monitor. 7.5 Embedded piping monitors. 7.6 Instruments and detectors used for background determinations shall be calibrated and the calibration shall be current. 8.0 EgoCEDURE 8.1 General 8.1.1 Areas are selected for backgrounu measurements which are demonstrated to be free of detectable contamination.from SNPS operations. This is documented by previous measurements or by a review of the history of the area. 8.1.2 The' background assessment is designed to establish standard reference background values (and the acceptable variation)-for each type of detector identified in sections 7.1, 7.2, 7.3 and 7.5 above. 8.1.3 The background assessment also includes measurements to assess the effects of the local measurement environment on the detector background response. Measurements will be taken on surfaces which are the same as or of similar coa. position to the principal surfaces in the SNPS. 8.1.4 Background measurements shall be taken at general locations on the SNPS site and at one or more locations off-site These include but, are not limited to:
- a. On-site Turbine Building (multiple locations)
Control Building 0 & S Building 0 6 S Bldg. Annex Other Site Bldgs. Colt Diesel-Generator Bldg Site Grounds (multiple locations)
- b. Off-site Shoreham-Wading River Fire house Outdoor areas within 2 miles of SNPS.
8.1.5 Standard statistics as described in Ref. 11.2 (Equations 8-11 and 8-12) will be calculated for each type of measurement in each area or survey. unit. After calculating the mean and standard deviation, a calculation ' to determine the number of backg ound data points will. be performed < using equation 8-22 of Ref. 11.2. The results and ac~ ions will be noted in the note s section of Appendix 12.2. Additional ca.culations and statistical evaluations will be performed as directed by the Termination Survey Engineer. SP 67X001.09 Rev. 1 Page 3
8,1.6 Data for the PIC versus pRem meter will be graphed and a correction factor will be calculated for converting the pRem meter readings to , units of pR/hr. 8.2 frenaration of Survey Packare The Termination Survey Engineer or the Termination Survey Radiological Engineers are to prepare individual survey packages for each unit or area selected for bac.k toun3 S assessment. For backgr ound assesonents a survey package consists of an instruction form (Appendix 12.3), data sheets (Appendix 12.1) and maps as necessary. 8.2.1 Prepare survey instructions. (Appendix 12.3) 8.2.2 Describe measurement objectives and locations. 8.2.3 llave Termination Survey Engineer review instructions. 8.2.3 Fill out headers for background data forms. (Appendix 12.1 ) 8.2.4 Use survey maps, as necessary, to document the locations and to select measurement locations. 8.3 on-site Buildint Interior 1.ocations 8.3.1 For each of the on-site interict building locations, take one thirty-minute scaler count with the ESP 7 and AC-3 7 Alpha Detector at one location, and take thirty one-minute scaler readings at each location identified in the survey instructions with the following instrument / detector combinations: , ESP-2 with; a. GM Pancake Detector
- b. LAD FC126
- c. LAD PT252 8.3.2 Take thirty one-minute scaler counts with the ESP-2/Aptec Floor Monitor combination as directed by the survey instructions. -
8.3.3 Take one pRem exposure reading at cach of the selected locations - one meter from the surface. 8.3.4 At each of the pRem exposure rate points, take a PIC reading. NOTE: Radon sampling is for informational purposes only and not required for background measurements. 8.3.5 With the RAD 7 monitor, take 3 five-minute radon samples. Attach the recorded printout for the eight samples to the Background Data Sheet (Appendix 12.1). 8.3.6 For each type of instrument / detector, note the detector type, serial no.and cal. duc date and record the data on the Background Data Sheet, SP 67X001.09 Rev. 1 Page 4
L 8.3.7 For the pRem readings and PIC readings, record on one Background Data Sheet. 8.4 On-Si.te Embedded Pipinn 8.4.1 For each type and size of embedded piping monitor, take thirty one-minute scalor readings as described in the survey instructions. 8.4.2 For each type and/or size of pipe monitor, record the data seperately on Background Data Sheet , Appendix 12.1. 8.5 On-Site Structure Exteriors 8.5.1 At each of the on-site structure exteriors, take scaler readings at each location identified in the survey instructions with each of the instrument / detector combinations as described in 8.3.1. 8.5.2 If the building is surrounded by pavement or other hard surface, take ~ thirty one minute scaler readings, as described in the survey instructions, with the ESP 2/ Floor Monitor combination. 8.5.3 Take one Rem reading at each designated location as identified in the survey instructions. 8.5.4 At each location, designated for pRem reading take PIC readings. 8.5.5 Take a radon sample outside the building as described in 8.3.5. 8.5.6 Record the above cadings on Background Sheets as per paragraph 8.3.6 6 8.3.7. S.6 On-Site Site Grounds 8.6.1 Take 30 dispersed pRem readings one meter from the ground as identified in the instructions (Appendix 12.3). At each of the locations, take a PIC reading. 8.6.2 Take radon samples (as described in 8.3.5) outside at one of the survey unit sites, for each day of background readings. , 8.6.3 Record the above readings on the Background Data Sheet for each unit and include *he appropriate radon concentration. 8.7 Off-site Buildinn Interior At three different areas in the of f site building interior, take a series of readings as described in 8.3.1 thru 8.3.7 in accordance with the survey instructi,ns. 8.8 off-Site Buildinn Exterior At the off-site building exterior take a ceries of readings as described in 9.5.1 thru 8.5.6 in accordance with the survey instructions. SP 67X001.09 Rev. 1 Page 5
8.9 . Data Calculations-8.9.1 When data is collected for each area:or unit,_a Radiological Engineer willido.the-necessary_ summary calculations for each type of detectnrland: _t record the information on the data forms where appropriate.
'8.9.2 Standard; Background Sheets (Appendix _12.2) will be filled out for each
- detector by area from the above calculated data, c8.9,3 Have Termination Survey _ Engineer review:the background sheet.
8.9.3 Additional calculations and statistical evaluations will'be' accomplished-as directed by the Termination Survey-Engineer. 9.0 ACCEPTANCE CRITERIA , For each type of measurement, the number of background data points shal1~ be greater ,
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than or equal to the number calculated in 8.1.5. 10.0- FINAL CONDITIONS l l N/A j
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11.0 REFERENCES
j 11.1 Shoreham Decommissioning Project Termination Survey Plan. 11.2 NUREG/CR-5849. Manual for Conducting Radiological Surveys in Support of-License Termination, (Draft Report) I I l V2.0 APPENDICES 12.1 Background Data Sheet-{ Sample) 12.2. Standard Background Sheet (Sample). ()) 12.3 Background Surycy Instraction Form (Sample)
- SP 67X001.09 Rev. 1-l- Page 6 1
Annendix 12,1~ Fage 1 of 1 Shorcham Decommicsioning Project BACKGROUND DATA SHEET ch *.t of SAMPLE Sarvey Unit No. l Survey Unit Name: .-
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Location / Description Surveyed By: Date: Instrument Ser No=> Cal. Due / / Detector Ser. No(s) Cal. Due / / LOCATION Radon Concentration: pCi/l Fir. LAD LAD GM Alph Pipe uRem PIC Location Mon. 126 252 Pan Det. Det. Meter Survey Descrip. Point No GCPM uRem/h uR/h 4 O ' LJ l 1 i [) v SP m0M.09 Rew 1 Average (Mean) Page 7
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A9pendix 12.2' Pcge 1 of 1 t Shoreham Decommiccioning Project SAMPUL STANDARD BACKGROUND SHEET _Ji Survey Unit Name: Survey Unit No. l Location / Description Surveyed By: Date: Instrument Ser No=> Detector Ser. No => Type of Detector => THE MEAN BACKGROUND FOR THE DETECTOR FOR THIS AREA IS: cpm / uRom/h cpm / uRem/h (Std. Deviation) , Notes: C Prepared by: Date: Reviewed by: Date: (s L) SP 67X001.09 Rev. 1 Page 8
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g eendix 12.3 Page 1 of 1 Shoreham Decommissioning Project SAMPLE BACKGROUND SURVEY INSTRUCTION FORM Sheet of .. PART 1. SURVEY UNIT / AREA DESCRIPTION Survey Unit No.
Description:
Unit Name/ Area: Base Map No. Offsite Imea Indoor area Outdoor area Background Survey Special Survey Other Survey PART 2. GENERAL INSTRUCTIONS NUMBER INSTRUCTIONS o P O . Prepared By: Date: Reviewed By: Date: prc 11/17/92 s, m- ;;; t}}