ML20133J579
| ML20133J579 | |
| Person / Time | |
|---|---|
| Site: | 07000299 |
| Issue date: | 01/14/1997 |
| From: | Bangart R NRC |
| To: | |
| Shared Package | |
| ML20133G976 | List:
|
| References | |
| FOIA-96-343 PROC-970114, NUDOCS 9701210064 | |
| Download: ML20133J579 (10) | |
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INDEPENDENT ffEASURDENTS PROGRAM q
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ENVIRONMENTAL RADIOLOGICAL !EASUREFENTS I
FOR Tile !!ALLINCKRODT CHEMICAL WORKS, HALLINCKRODT/ NUCLEAR DIVISION l
ST. LOUIS,itISSOURI i
Prepared by Richard L. Bangart i
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t O
N Approved:
Oeorge L. Voelz, !!.D., Ditector i
llealth Services Laboratory f
Idaho Operations Office U.S. Atomic Energy Commission 1
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l 9701210064 970114
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FLOYD96-343 PDR j
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IdTI'0DilCTIO:1 Yho desicu of the It.?epandent "aasurenents Procren(I:fP) for the l'allinckrodt/
iluelear (?!/U) Divi.iic:. radioisotope laboratory is vased on informstion obtained from the following sources:
(1) A preliminary environmental sampling plan designed by CO:III personnel cognizant ofIf/N operations and problens; (2) discussions with CO III and CO:HQ personnel; (3) a tour of the plant environs; and (h) experience gained from other I?T locations.
Tne operating history of this facility has snown that tha release of large i
quantities of radiocontaninants to the environment is unlikely, however, sono activity is released to the air and controlled discharges of liquid radioactive waste are made to a sanitary sever line. Samplir.g efforts vill be focused on these initial off-site receptors of the laboratory's radioactive discharges. Surveillance vill be directed toward those radioisotopes vaich !!/U is licensed to possess. Tables I and II, attachad, list the radioisotopes which M/H handles and the overall sampling program, respectively.
TI.
AIR.!'ONITORING A.
Licensco Air Ifonitoring The licensce's environmental air sampling progran consists of thirtoon continuously operating cartridge camplers located around tae perineter of the facility roof. The snmplers are in the forn of eight foot high 1
"Uheynerd's Canes," each connected to a vacuum pump through a manifold.
The hoicht of the exhaust stacks is Creater than the height of the air intake of the " Shepherd's Canes," and therefore the air concentrations j
measured may not be representative. The cartridges are enanged weekly.
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lio other air sampling is performed by !!/N.
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I:T Air ffonitoring Locations and Equipment Continuous air samplers vill be provided by tue ID liealth Gervices j
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Laboratory for installation at the following locations:
Location Location Humber i
Roof of the Dennett Box Co.,
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approximately 50 feet to the l
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north of M/N 2
Roof of the fire station on l
Dorsett Rd., approximately 1200 feet north and 50-60 feet higher in elevation than M/N 4
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Roof of the !!FA Plant Food 3
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ilarehouse at the corner of
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l Dorsett and Adie Roads, approximately 2h00 feet southeast and about 50 3
feet higher in elevation than !!/N 1
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j Howard Bend Station City Waterworks,
b approximately seven miles southwest of !!/N, as a background location j
i The choice of air sampler locations was based upon a review of local i
meteorological data by C0;III personnel. The local vinds are predominantly l
Sou'.harly between May and November and northwesterly between December and April.
The air samples will be collected continuously by means of Gelman j'
Huclear Air Camplers (Model 26001) at a flow rate of approximately i
1 efm. The samplet will be equipped with an open-faced filter holder
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containing a membrane pre-filter (Gelman Model VMd or equivalent),
ca 31e of collecting particles down to 0.05 micron with an efficiency j
of >955, followed by an in-line filter holder containis e a charcoal i
impregnated cellulose fiber filter (Gelman Model AC-1, or equivalent) for removal of iodine from the air stream. In addition, tne air sampler pump q
will be used to draw air through a device iodtaining silica cel vnica i
vill sample for tritiated atmospheric water vapor. The air samplers will be enclosed in shelters designed to reduce tamperin6 and provide weather protection. The filters and atmospheric tritium samplers vill be changed veckly and sent to the ID Health Services Laboratory for analysis.
The sampling tecnnique described here vill not collect Hg vapor in the atmosphere. A technique is being developed in the Lacoratory and should be available soon.
- 4 C.
Air Sample Analysts Preparhtion and Counting: No chemical preparation of air sample filters is required to assess the gross alpha, beta, or gamma activity in tne samples. Gross activity measurements are made before specific isotopic j
determinati se vhien require destruction of filters. Even thougn tne licensee d m.st handle alpha emitting radioisotopes, initially a gross alpha count vill ue made on the membrane filter. The resulta vill help determine if the air concentration at the unckground location is rep-resentative of the background at the field sarpling locations. Botn groso alnha and beta measursments vill be made on the membrane filter, but only gross beta on the charcoal filter.
1.
Gross Alpha: In measuring the gross alpha activity in an air sample, j
the technique employed is essentially that reported by liallden and j
harley ("An Improved Alpha-Counting Technique," Anatrtical Cnemistry, j
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22,, 1862 (1960) ).
After collection of the membrane filter in the field, it is placed in direct contact with an alpha nensitive paosphor disc, both of which are held in place on a nylon loc. ting ring. Thus nasemuled, t:ic sample is mailed to the ID IIealth Services Lavoratory viere it is placed in a sample holder and rotated into a licnt tigat counting compartmant. Within the compartment the sample is pressed firmly against the face of a spring-loaded, low-noise photomultiplier tube and counted with an appropriate scalar system. A counting rate correction for sample selfsabsorption is made using a pre-determined graph of the percent absorption of Ra alphas versus sample tnicknes9 2.
Cross Beta: For gross beta activity measurements, the filter disc is a
mounted on a ringed planchet and counted in a low-background oeta counter which is calibrated with a standard T1 source. Counting rates are corrected for sample self-absorption based on measured absorption of T1 bet as. Because the distribution of energies resulting from beta emission is continuous from the characteristic E,,,down to zero, the actual disintegration rate is nighly depandent on the compocition of the sample and the quantity of absorber present.
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Consequently, the gross beta counting resul.ts of unknown mixtures cc.n _.
De interpreted only as being T1 eqnivalent, and nothing else.
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~9 If the cross beta activity exceeds 2 x 10 uCi/ml ( P MPC; 32 10CFR20 Table II, Column 1), a specific analysis for p yg1y 32 be made. If P betas are present, they vill be absorbed less 32 and detected more efficiently than T1 betas. Thus P analyses will always be made prior to reaching the P MPC.
3.
Gross Gamma:
If the gross beta activity of either filter exceeds 8 x 10 uCi/ml (
'I MPC; 10CTR20. Table II, Column 1), tuen a
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gross gamma scan of the filter vill be made. Cross gamma activity of the air samples is measured with a calibrated well-type counter.
If the gross gamma counting results indicate a concentration creater
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than 8 x 10 uCi/ml, a gamma spectrum vill be run vita a multicaannel analyzer to identify specific isotopes in the sample. Appropriate analyses vill be made for individual isotopes identified, k.
Atmospheric Tritium: The water vapor collected on the silica gel desiccant vill oe analysed for tritium by direct liquid scintillation counting of a small, representative portion of the silica 6el (approxi-mately 5-8 grams ).
In this method the cilica gel is placed in a PPO, POPOP, napthalene, p-dioxane scintillator and counted in a ceckman Scintillation System.
III. DIPECf RADIATION Direct radiation measurements using!thennoluminescent dosimeters vill be made at the following locations:
l Number of Location Dosimeters Location No, a
H, M/H perimeter fence 5
5 E, M/N site perimeter 5
6 S, M/N perimeter fence 5
7 W, M/N perimeter fence 5
8 Hoof of Dennett Box Co.,
approxf ntely 50 feet 5
1 5
north M/N
5 Humber of l
Location Dosimeters Location No.
Roof of Fire Station on Dorsett Rd., approximately 10 2
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1200 feet north and 50-60 feet higher in elevation than M/N, as a secondary background location Howard Serd St.ation City 20 h
Waterworkt, approximately 7 miles SW of !!/H, as a calibratien and background location.
1 The thermolumir.cacent material used In~ tile dosimeter is the lithium flouride TLD 700 high sensitivity crystal. Each dosimeter vill be placed in a NRTS dosimetry badge and the badges vill be exchanced monthly. The dosimeter vill be evaluated by the Doaimetry Branch of the Health Services Lauoratory using a model 2000 Harshaw Chemical Comp-any Thermoluminescence Analyzer.
The thermoluminescence reading is converted to millirad based on a Ra calibration. The results of each group of badges are averaged and tue I
reported value represents the measured dose tc TLD 700 tissue equivalent material (exposed directly througn an open vindow) minus the dose measured at the backgruund location.
IV.
WATER MONITORING A.
Licensee Water 11onitoring a
1 All liquid active vaste is piped into retention tanks and then to a privately ownsd utility company sanitary sever line along with all l
other liquid vaste. The sanitary sever line terminates at two 35 i
acre settling lagoons near the Missouri River. Knowing the isoto? c l
concentration and the 100 cubic meter per day water usage, the licens e determines tae maximum daily tank volume which can be disenarged.
The licensee does not sample the liquid vaste beyond the retention tants.
l B.
IMP Unter fionitoring 1.
Location: The only easily available sempling location it. tue
-C-sever line to vitich the liquid vaste is released is the lift stntion and vet well near Vigus, Missouri, about '
three miles northwest of the licensee. It is proposed to place a continuous water sampler at the lift station in order to obtain a [omposite Eater sample representative of tae
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sewer line's flow. The water sample vill be collected i
veekly and sent to the ID Healta Services Laboratory for analysis.
i C.
Water Sample Analysis 1.
Oross Alpha: Nogrossalphaanalysisvil1}oeperformedonvater samples, since the licensee does not handle alpha emitters.
2.
Gross Beta: A 100 ml aliquot of the sample is dried on a plar.c. ct and counted in a low-background beta counter which has been calibrat-ed with a standard T1 source. Counting rates are corrected for 20h sample self-absorption based on measured absorption of T1 betas,
~E If the activity in the sample exceeds 2 x 10 uCi/m1, the 4
32 10CFR20. Tacle II limit for P, a specific analysis for tais isotope vill be made.
3.
Gross Gamma: A one liter aliquot of the sample is counteu in a
~I sodium iodide well-counter. If the sample activity exceeds 2 x 10 uCi/ml, the 10CFR20 Table II !!PC for I, a gamma spectrum vill be run using a multi-channel analyzer. Tue activities of specific j
isotopes identified in the spectrum vill be determined, i
k.
Tritium: Tritium activity is determined by liquid scintillation counting. In this method a PPO, POPOP, naptualene, p-dioxano scin-tillator is used with a Bebkman Scintillation System. The sample is first gamma counted to determine if other radioactivity is present.
If activity other than tritium is..present, distillation of the sample is necessar. Whett distillation is not necessary, particulate
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I matter is removed by filtering and any color is removed to prevent I
quenching. Five milliliters of aqueous sample are used in 18 ml of scintillator. A blank sample of identical size is used to determine i
_7 background. A standard tritie.ted water sample is used to calibrate the countine, system.
lh 5.
Carbon-lha because the weak betas of C are not detected in the c.ross beta counting procedure, at least intitially an analysis 1
specific for C will be required for each water sample.
V.
OTHER SU{PLING There are no foodstuffs in the area vnich migat be affected by normal li/I! operations. Because of this fact and the nature of the 14/ii releases, no sampling of other media is recommended at present.
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TAliLE I.
I ttallinckrodt/ Nuclear Schedule of Badioisotopes i-i Wuclide Amount Trequency i
131 I
15 Ci Weekly 32p 1.6 Ci Weekly 190Au 60 Ci Weekly 19Illg h Ci Weekly I9Se 30.5 mci Semi-tionthly 125 I
3ho inCi
!!onthly 60 Co 300 uci
!!onthly j
Co 950 uCi Monthly I
203 l
lig approx. 35 Ci Every 10 Weeks Sr approx. 1 Ci Every 10 Weel.s Fe approx. 350 mci Every 10 Weeks Cr approx. 5 Ci Every 10 Weel.s 9 Mo approx. 155 Ci Veekly I C 10-12 Ci Yearly 1
In tue near future !!/11 plans to procure approximately 300 Ci of tritium, as a gas, each year.
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i TAELE II i
H/L Environmental Sampling Program i
Loention Measurement Type and Frequency
- 1, Roor or Dennett Box Co.,
Air, continuous vitn weekly filter approximately 50 feet north changes of M/N TLD, continuous exposure vita monthly dosimeter changes
- 2, Roof of fire station on Air, continuous with weekly filter Dorsett Hd., approximately channes 1200 feet north and 50-60 TLD, continuous exposure with monthly feet hicher in elevntion dosimeter enang.es (a secondary than M/N TLD oschground location)
- 3, toof of MFA Plant Food Air, continuous with veenly filter W. arehouse at the corner o.f changes Dorsett T. Adie 1:oads, approximately
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2h00 feet southeast and' about 50 feet higher in elevation than M/H
- h, Howard Bend Station City Waterworks Air, continuous with veekly filter approximately seven miles southwest changes of M/N, an nir and TLD background TLD, continuous exposure with monthly location douimeter changes i
- 5, North, M/N perimeter fence TLD, continuous exposure vita monthly dosimeter changes i
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- 6, East, M/d site perimeter TLD, continuous exposure with monthly dosimeter cuanges i
- 7, South, M/U perimeter fence TLD, continuous exposure with j
monthly dosimeter enance-i
- 0, West, M/J perimeter fence TLD, continuous exposure with j
monthly dosimeter cuanges
- ?, Sower line lift station and Water, continuous collection with vet well near Viguo, lio.,
weekly changes 1
l about 3 miles northwest of.M/N J
4 A typical sample vill be indentified by the following code
!!/N-1-A, vacre: M/G q
signifies any sample associated with the !!allinckrodt/Huclear Division facility; 1
i 1, or another number designates the sampling location (see above); and A, or. other j
letter code, specifica the medium sampled (code below).
I Sample Type Code Air A
Surface Water SW External Radiation ER J
e, e--, - - -
. - - - +,