ML19309G779
| ML19309G779 | |
| Person / Time | |
|---|---|
| Site: | 05000147 |
| Issue date: | 04/30/1980 |
| From: | ROCKWELL INTERNATIONAL CORP. |
| To: | |
| Shared Package | |
| ML19309G778 | List: |
| References | |
| NUDOCS 8005070556 | |
| Download: ML19309G779 (16) | |
Text
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8005 070 [ i i
g REPORT OF RADIATION SURVEY OF THE FCEL REACTOR FACILITY IN SUPPORT OF REQUEST TO TERMINATE FACILITY LICENSE CX-17 AND TO RELEASE THE FACILITY FOR UNRESTRICTED USE 00CXET NO. 50-147
1.0 INTRODUCTION
i C;erations under the dismantling plan authorized by previous NRC (USAEC)
) order dated November 1,1974, have been completed. This report presents the supporting information indicating that the dismantling effort has been completed so mt the facility license may be tenninated and the facility released for unr2 :;icted use. '
2.0 !TATUS OF FACILITY DISIONTLING The split-table critical machine has been dismantled and removed. Other
, hardware and parts not necessary for operation of the building have been removed 3
witn the exception of an instrument shop. The instrument shop has occupied and will continue to occupy the rooms in the building as indicated in Figure 1.
The building has been cleaned and surveyed for contamination. No covering material such as painting, niating, or wax has been applied to the floor, walls, equipment, or structure remaining in the building. Such covering will not be acolied until after NRC approval to release for unrestricted use.
3.0 RESULTS OF SURVEY FOR ACTIVATION PRODUCTS AND TOTAL SURFACE ACTIVITY The area in and around where the split-table critical machine was located nas been checked for e/idence of induced radioactivity. This included the pit area below the split table and the floor and wall areas closest to the machine wnen it was in place.
i
General radiation background measurements were made with a Ludlum Model 125 Micro R meter and a Technical Associates PUG-1 countrate meter with a thin I
window pancake G*1 detector. Residual activity in the critical assembly area was determined to be below 0.1 m rad /hr at 1 cm from the surface with a 7 mg/cm2 absorber as measured with a Technical Associates flodel CP-7M ion chamber dosimeter.
Alpha activity was surveyed by use of a Ludlum l'odel 12 countrate meter equipped with a Ludlum Alpha Scintillation Probe flodel 43-5.
4.0 RESULTS OF SURVEY FOR REMOVABLE ACTIVITY Surfaces were smeared for contamination using standard health physics procedure. In suspect places such as in sumps, traps, filters, etc., samples were collected and counted using standard procedures. The smears were counted with a Nuclear Measurements Corp. Gas Proportional automatic counting system. '
This system is capable of counting both alpha and beta-gama activity simul taneously. It will detect 43.5% of all beta activity present, and 26.3%
of all alpha activity for radionuclides expected to be present.
The results of these surveys are summarized below. The detailed results are on file in the Radiation and Nuclear Safety Office at the ESG Headquarters on De Soto Avenue. The locations of the areas cited below are given in the attached figure.
. Critical Assembly Room - Floor Area -
2 Measurements of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma
. Critical Assembly Room - East Shield Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma
. Critical Assembly Room - South Shield Wall 2
Measurement of all smears showed less than 20 d/m/100 cm 2
alpha and 50 d/m/100 cm beta-gama
, 2 i
. Critical Assembly Room - West Shield Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama
. Critical Assembly Room - North Shield Wall The average of all the smears showed less than 20 d/m/100 cm 2 2
alpha and 50 d/m/100 cm beta-gama.
. Critical Assembly Room - Utre Tray - South Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama
. Critical Assembly Room - South Air Conditioner - West Hall 2
Measurement of all smears showed less than 20 d/m/100 cm .
alpha and 50 d/m/100 cm2 beta-gama
. Critical Assembly Room - North Air Conditioner - West Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma
. Critical Component Laboratory - Room 114 Measurements of all smears from the room showed less than 2 2 20 d/m/100 cm alpha and 50 d/m/100 cm beta-gama. Survey meter readings showed background alpha and beta-gamma, i.e. ,
less than 0.015 mr/hr beta-gamma.
. Chemical Laboratory - Room 130 Measurements of all smears for the floor and walls showed less 2 2 than 20 d/m/100 cm alpha and 50 d/m/100 cm beta-gama. Survey meter readings showed background alpha and beta-gamma, i.e. ,
less than 0.015 mr/hr beta-gamma.
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. Closet (adjacent to Chemistry Lab) - Room 126 Measurement of all smears from the room showed less than 2 2 20 d/m/cm alpha and 50 d/m/100 cm be ta-gama. Survey meter readings showed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gamma.
. Change Room - Room 128 Measurement of all smears for the rocm showed less than 20 d/m/100 cm2 alpha and 50 d/m/100 cm 2beta-gamma. Survey meter readings showed background alpha and beta-gamma, i.e.,
j less than 0.015 mr/hr beta-gama.
. Control Passage Way - Room 113 Measurement of all smears from the room showed less than 20 d/m/100 cm2 alpha and 50 d/m/100 cm 2beta-gamma. Survey meter readings showed background alpha and beta-ganta, i.e.,
less than 0.015 mr/hr beta-gama.
. Fuel Vault - Room 112 Measurement of all smears from the room showed less than 2
20 d/m/100 cm alpha and 50 d/m/100 cm2 be ta-gama . Survey meter readings showed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gama.
. Subassembly Room - Room 111 Measurement of all smears from the room showed less than 2
20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma. Survey meter readings showed background alpha and beta-gama, i.e.,
less than 0.015 mr/hr beta-gama.
. Locker Room - Room 127 Measurement of all smears from the room showed less. than 20 d/m/100 cm2 alpha and 50 d/m/100 cm2 beta-gama . Survey meter readings showed background alpha and beta-garm:a readings, i.e., less than 0.015 mr/hr beta-gamma.
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. Equipment Storage - Rcom 131 l'easurement of all smears from the room showed less than 2
20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gamma. Survey meter readings showed background alpha and beta-gama, i.e.,
less than 0.015 mr/hr beta-gamma.
4
. Material Storage - Room 115 Measurements of all smears from the room showed less than 2 2 20 d/m/100 cm alpha and 50 d/m/100 cm beta-gama. Survey meter readings showed background alpha and beta-gama, i.e.,
less than 0.015 mr/hr beta-gamma.
. Other Building 100 Rooms (nonoperating areas) ,
Smears were taken from the following areas:
Womens' Lavatory, Room lig Mens' Lavatory, Room 120 Entry Area, Room 102 Health Physics, Room 123 Hall Corridor, Room 124 Office, Room 103 Office, Room 104 Office, Room 105 Hall Corridor, Room 107 Office, Room 106 Instrument Service and Lab, Room 108 Control Room, Room 109 2
ffeasurements all showed less than 20 d/m/100 cm alpha and 2
50 d/m/100 cm beta-gamma. Survey meter readings showed back-ground alpna and beta-gama, i.e., less than 0.015 mr/hr beta-gama.
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. Drain and Cleanout Lines Smears were taken from the following locations:
Floor 0 ain, Room 114 Floor Drain, Room 130 Wall Drain, Room 130 Wall Drain, Room 128 Floor Drain, Room 128 Floor Drain, Room 127 Wall Orain, Room 127 Orain, Room 120 Drain, Room 121 Floor Drain, Room 111 Cleanout, Room 111 Lines to Outside Holdup Tank Outside cleanout line at east wall Outside cleanout line at southeast wall Inside of line at holdup tank 2
"easurements all showed less than 20 d/m/100 cm alpha and 2
50 d/m/100 cm beta-gamma. Survey meter readings showed back-ground alpha and beta-gamma, i.e., less than 0.015 mr/hr beta-gamma.
- . Ventilation System Smears were taken at
Exhaust Plenum,1st Roof Level Exhaust Plenum, 2nd Roof Level 2
Measurements all showed less than 5 d/m/100 cm alpha and 2
50 d/m/100 cm beta-gamma. Direct survey with PUG-1 showed no contamination.
6 i
. Liquid Materials - 100 m/ volume A Cfj/Alrha. 8 Ci/m/ Beta Holdup Tank Pit Motor Nore <. etected 1.7 x 10-U Holdup Tank Motor 1.~ . 10-8 1.7 x 10~0 North Holdup Tank Motor 1.9 x 10-8 1.5 x 10-8
5.0 CONCLUSION
The results of the radiation surveys are all well under the acceptable surface contamination levels (removable) for the nuclides listed in Table 1 of US NRC Regulatory Guide 1.86.
As indicated from Section 3.0, there is no indication of the presence of activation remaining in the most susceptible areas around where the critical machine was located.
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O 5 10 15 EPITilERMAL CRITICAL EXPERIMEtlT LABORATORY BUILDitlG 100 9
REPORT OF RADIATION SURVEY OF THE FCEL REACTOR FACILITY IN SUPPORT OF REQUEST TO TERMINATE FACILITY LICENSE CX-17 AND TO RELEASE THE FACILITY FOR UNRESTRICTED USE DOCKET NO. 50-147
1.0 INTRODUCTION
Operations under the dismantling plan authorized by previous NRC (USAEC) order dated November 1,1974, have been completed. This report presents the supporting information indicating that the dismantling effort has been completed so that the facility license may be terminated and the facility released for unrestricted use. -
2.0 STATUS OF FACILITY DISMANTLING The split-table critical machine has been dismantled and removed. Other hardware and parts not necessary for operation of the building have been removed with the exception of an instrument shop. The instrument shop has occupied and will continue to occupy the rooms in the building as indicated in Figure 1.
The building has been cleaned and surveyed for contamination. No covering material such as painting, plating, or wax has been appl.ed to the floor, walls, equipment, or structure remaining in the building. Such covering will not be applied until after NRC approval to release for unrestricted use, 3.0 RESULTS OF SURVEY FOR ACTIVATION PRODUCTS
/.ND TOTAL SURFACE ACTIVITY The area in and around where the split-table critical machine was located l has been checked for evidence of induced radioactivity. This included the pit area below the split table and the floor and wall areas closest to the machine l
when it was in place. '
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General radiation background measurements were made with a Ludlum Model 125 Micro R meter and a Technical Associates PUG-1 countrate meter with a thin window pancake GM detector. Residual activity in the critical assembly area was determined to be below 0.1 m rad /hr at I cm from the surface with a 7 mg/cm2 absorber as measured with a Technical Associates flodel CP-711 ion chamber dosimeter.
Alpha activity was surveyed by use of a Ludlum tiodel 12 countrate meter equipped with a Ludlum Alpha Scintillation Probe flodel 43-5.
4.0 RESULTS OF SURVEY FOR REMOVABLE ACTIVITY Surfaces were smeared for contamination using standard health physics procedure. In suspect places such as in sumps, traps, filters, etc., samples were collected and counted using standard procedures. The smears were counted with a Nuclear Measurements Corp. Gas Proportional automatic counting system.
This system is capable of counting both alpha and beta-gama activity simultaneously. It will detect 43.5% of all beta activity present, and 26.35 of all alpha activity for radionuclides expected to be present.
The results of these surveys are sumarized below. The detailed results are on file in the Radiation and Nuclear Safety Office at the ESG Headquarters on De Soto Avenue. The locations of the areas cited below are given in the attached figure.
. Critical Assembly Room - Floor Area 2
Measurements of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma
. Critical Assembly Room - East Shield Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama
. Critical Assembly Room - South Shield Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama 2
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. Critical Assembly Room - West Shield llall 2
lleasurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama
. Critical Assembly Room - florth Shield Wall The average of all the smears showed less than 20 d/m/100 cm 2 alpha and 50 d/m/100 cm2 beta-gama .
. Critical Assembly Room - Hire Tray - South Hall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama
. Critical Assembly Room - South Air Conditioner - West !!all 2
Measurement of all smears showed less than 20 d/m/100 cm .
alpha and 50 d/m/100 cm 2beta-gamma
. Critical Assembly Room - North Air Conditioner - West Wall 2
Measurement of all smears showed less than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama
. Critical Component Laboratory - Room 114 Measurements of all smears from the room showed less than 2
20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gamma. Survey meter readings showed background alpha and beta-gama, i.e. , -
less than 0.015 mr/hr beta-gamma.
. Chemical Laboratory - Room 130 Measurements of all smears for the floor and walls showed less 2
than 20 d/m/100 cm alpha and 50 d/m/100 cm2 beta-gama. Survey meter readings showed background alpha and beta-gama, i.e. ,
less than 0.015 mr/hr beta-gamma.
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. Closet (adjacent to Chemistry Lab) - Room 126 Measurement of all smears from the room showed less than 20 d/m/cm2 alpha and 50 d/m/100 cm2 beta-gamma. Survey meter readings showed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gamma.
. Change Room - Rocm 128
. Measurement of all smears for the room showed less than
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20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma. Survey meter readings showed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gamma.
. Control Passage Way - Rccm 113 Measurement of all smears from the room showed less than o
20 d/m/100 cm al:na and 50 d/m/100 cm 2beta-gamma. Survey mete readings sn:^. M background alpha and beta-gama, i.e.,
less than J. T.3 .r.* r beta-gama.
. Fuel '/ault - ?.com 112 Measurement of all smears from the room showed less than 20 d/m/100 cr. 11;ha ind 50 d/m/100 cm 2beta-gamma. Survey meter readings shcwed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gama.
. Subassembly ?.ccm - Rcem 111 Measurement of all smears from the room showed less than 2
20 d/m/100 cm alpha and 50 d/m/100 cm 2beta-gamma. Survey meter readings showed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gamma.
. Locker hcm - R:cm 127
- easurement of sil smedrs from the room showed less than 7
20 c/m/100 cm aloha and 50 d/m/100 cm2 beta-gama . Survey me:ar readings showed background alpha and beta-gamma readings, i.e., less than 0.015 mr/hr beta-gamma.
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. Equiement Storage - Room 131 l t'easurement of all smears from the room showed less than 20 d/m/100 cm2 alpha and 50 d/m/100 cm2ceta-gamma. Survey meter readings showed background alpha and beta-gamma, i.e.,
less than 0.015 mr/hr beta-gamma.
. Material Storage - Rcom 115 Measurements of all smears from the room snowed less than 20 c/m/100 cm2 alpha and 50 d/m/100 cm2beta-gamma. Survey meter readings showed background alpha and beta-gamma, i.e. ,
less than 0.015 mr/hr beta-gamna.
. Other Building 100 Rooms (nonoperating areas) .
Smears were taken from the following areas:
i Womens' Lavatory, Room 119 Mens' Lavatory, Room 120 Entry Area, Room 102 Health Physics, Room 123 Hall Corridor, Room 124 Office, Room 103 Office, Room 104 Office, Room 105 Hall Corridor, Room 107 Office, Room 106 Instrument Service and Lab, Room 108 a
3 Control Room, Room 109 i
Measurements all.showed less than 20 d/m/100 cm2 alpha and U
50 d/m/100 cm beta-gamma. Survey meter readings showed back-ground alpha and beta-gamma, i.e., less than 0.015 mr/hr beta-gamma.
i 5
. Drain and Cleanout Lines Smears were taken from the following locations:
Floor Drain, Room 114 Floor Orain, Room 130 Wall Drain, Room 130 Wall Drain, Room 128 Floor Orain, Room 128 Floor Drain, Room 127 Wall Drain, Room 127 Orain, Room 120 Drain, Room 121 Floor Drain, Room 111 Cleanout, Room 111 Lines to Outside Holdup Tank Outside cleanout line at east wall Outside cleanout line at southeast wall Inside of line at holdup tank Measurements all showed less than 20 d/m/100 cm2 alpha and 50 d/m/100 cm2beta-gamma. Survey meter readings showed back-ground alpha and beta-gamma, i .e., less than 0.015 mr/hr beta-gama.
- . Ventilation System Smears were taken at
Exhaust Plenum,1st Roof Level Exhaust Plenum, 2nd Roof Level 2
Measurements all showed less than 5 d/m/100 cm alpha and 2
50 d/m/100 cm beta-gamma. Direct survey with PUG-1 showed no contamination.
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. Liquid Materials - 100 m/ volume I A Ci/m/ Aloha Ci/m/ Beta l Holdup Tank Pit Motor None detected 1.7 x 10-8 Holdup Tank Motor 1.7 x 10-8 1.7 x 10-8 North Holdup Tank Motor 1.9 x 10-8 1.5 x 10-8
5.0 CONCLUSION
i The results of the radiation surveys are all well under the acceptable 2 surface contamination levels (removable) for the nuclides listed in Table 1 of US NRC Regulatory Guide 1.86.
1 As indicated from Section 3.0, there is no indication of the presence of i activation remaining in the most susceptible areas around where the critical machine was located.
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