ML20101B055

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Rev 5 to Emergency Plan Implementing Procedure HNP-8134, Whole Body Counter Sys
ML20101B055
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 12/17/1984
From: Sorrell E
GEORGIA POWER CO.
To:
NRC OFFICE OF ADMINISTRATION (ADM)
References
DCS-84-156, HNP-8134, NUDOCS 8412200071
Download: ML20101B055 (20)
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V PROCEDURE Whole Body Counter Systems _.-

PROCEDURE TITLE .

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PROCEDURE NUPEER Lab RESPONSIBLE SECTION SAFETY RELATED ( X) NON-SAFETY RELATED ( )

APPROVED APPROVED REV. DESCRIPTION DEPT. GENERAL DATE MANAGER MANAGER

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f WHOLE GODY COUNTER SYSTE!jS

'A. -PURPOSE To provide" instructions for the operation and calibratior, of the Whole Body Counters (W.B.C.).

B. REFERENCES Operating and Service. Manual:

1.-.

Ortec. Preamplifier, Model 113.

2. Ortec. Amplifi'er, Model 435.
3. Bioassay Program HNP-8021.

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4. Nuclear Data Model 66 Multichannel Analyzer.
5. Ortec Hi Voltage Power Supply Model 456. ,

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6. Nuclear Data A.D.C., Model 575. -
7. Ortec Hi Voltage Fanout.'Model P1.
8. Ortec Modular Systems Sinc, Model 4 CIA.
9. Ortec Model 401A Bin Power Supply.
10. Thallium drifted Na(I) crystal detector-5 X 4" (Torso).

11.. Thallium drifted-Na(I) crystal detector 4" X 4"-(Lungs).

12. Thallium drifted Na(I) crystal detector 1.5" X 2" (Thyroid).
13. Hewlett-Packard 9845B calculator.
14. Hewlett-Packard 9134A Disc Contro'ler.

' 15. Hewlett-Packard 9E95A Flexible Disc Mzmory.

16. Applied Physical. Technology Series 6000 W.B.C. Mechanical l Operation. Installation and Maintinance Manual.
17. Applied Physical Tc':hnclogy'W.B.C. Data Analysis Package b Program Manual.

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.18. A.N.S.I. N343-1978 American National Staniand For Internal Dosimetry For Mixed Fission.And Activiatior. Products. .

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Georgia Power d See Title Page 2 of 14 C. SAFETY

1. Observe Radiation Protection Procedures. ,
2. Refer to Chemical Safety Manual.

D. STANDARDS The W.B.C.'s are checked daily for energy calibration, when in operation. The W.B.C.'s use 3 Uh-152 sources. They are checked annually for efficiency using a variety of mixed standards. Some of the isotopes normally used is.clude Na-22, Y-88, Cs-137, Sn-113, I-131, Cs-134, Co-58, 2n -65, Co-60, Mn-54, Fe-59 and Cr-51. Consult Lab Foreman to decide which to use.

E. WHOLE BODY COUNTER

1. Description of Instrument. .,

The Whole Body Counter (W.B.C.) systems consists of equipment listed in B., References. The 3 Na(I) Detectors are connected via high voltage coaxial cable to the high voltage fanout. High voltage fanout is fed directly from .

the high voltage power supply, model 456. Signal is

_O provided to the amplifier input via coaxial cable from the preamplifiers. The amplifier output is connected to the A.D.C. via coaxial cable and then to the Multichannel Analyzer Exit 1 over multiconducter cable and then from the multichannel analyzer RS-232 interface output to the Hewlett-Packard 98458 Calculator. The amplifiers, high voltage power supply, and high voltage fanout are mounted in a NIM-BIN chassis.

2. Description of Controls.

The controls are listed and described in the operating i manuals for the respective equipment in the sections noted.

L a.- Na(I) Detectors - No controls.

j b. Preamplifier - See section 2 of reference B.1, Ortec l

Preamplifier Model 113.

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c. High Voltagt Power Supply - See sections 1 and 2 of references B.5, Ortec High Voltage Power Supply Model 456.

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d. Amplifier - See sections 2 and 4 of reference B.2, Ortec Amplifier Model 485.

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e. -High Voltage.Fanout - Used to supply each detector with a constant voltagc (1000 volts). See reference 0.7.
f. Bin Power Supply - See section 2 and 4 oF reference B.9, Ortec Bin Power Supply Model 401 A.
g. Multichannel Analyzer - See section 4 of references B.4, Nuclear Data Multichannel Anal >Ier Model ND66.
h. APT Uncle Body Counter Chair - See section 3 of reference B.15, Applied Physical Technology, Inc.

Mechanical Operation, Installation, anc Maintenance

. Manual Model W3C-EOCO.

i. Modular System Bins - No controls.
j. 98459 Calculator - See Chap ters 1 and 2 of Reference B.13, Hewlett-Packard 9345B calcula tor. u.
3. Operation of Instrument NOTE

Y There are standard switch positions. Swstch

~s I positions may vary.

a. Standard Switch Positions f or Ope ra tion.

(1) Verify that power cords From all equipment are connected to grounded 115 volt line receptacles.

(2) Verify settings on Thyroid Amplifier are as follows:

(a) Coarse Gain Knob: 4.0 (b) Fine Gain Kncb: 5.0 (c) Positive - Negative Toggle 3 witch: Negative

-(d) Unipolar - Bipolar Toggle Switch: -Unipolar (3) Verify settings on Lung Amplifier are as follows:

(a) Coarse Gain Knob: 8.0 (b) Fine Gain Knob: 5.0

_(~N (c) Positive - Negative Toggle Switch: Negative

-L] (d) Unipolar ~- Bipolar' Toggle Switch: Unipolar su sual s e t

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(4). Verify settings on Torso Amplifier are as follows:

(a) Coarso Gain Knob: 3.0 (b) Fine Gain Knob: . 5. 5 (c) Positive - Negative Toggle Switch: Negative (d) Unipolar - Bipolar Toggle Switch: Unipolar (5) Verify settings'on Torso, Lungs and Thyrol'd Preamplifiers are as follows:

(a) Input Cap. Knob for Torso: 100 (b) Input Cap. Knob f or Lungs: 100 (c) Input Cap. Knob for Thyroid: 100 a

(6) Verify settings on High Voltage Power Supply are as follows:

(a) Power - Off Switch:. Power- .

() (b) ~ Voltage Output' Switches:

1. Six position switch: 1000
2. Five-position' switch: Oz
3. Ten-turn potentionmeter: 1.

(c) . Polarity Switch [(rear panel): Positive (d) Control Switch (ccar panel): Internal

. ( ~7 ) Verify settings on Multichannel Analyzer are as follows:

(a) Power.On-Off Switch: On

. (8) Verify 95450 calcula tor and 9335A: Flexible disk drive are operable.

(9) Verify On-Off Toggle Switch on Nim-Bin is-on.

-(10) Verify settings on ND575 ADCs are.as follows:

(a) Cony Gain - 256 fQ

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b. Power'Up (Ortec-High Vc1tage Power Euppir Mode 1-456) ,

(1) Check to see that power switch is in the Off Position.

(2) Set polarity switch on rear panel to positive.

(3) Verify high voltage cable is connected'from the output on the 456 to'the input of the High Voltage.

Fanout.

(4) Set the Front panel selector switches and potentiometer as noted in E.3.a.(6).(b).

(5) Turn on the power with the toggle switch on the front panel. Instruments are now ready for use.

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c. Chair Counter Operation (1) Verify high voltage is energized and adjusted to the setting as stated in E.3.a.(6).(b). ,

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() (2) Note that power. (ac).iu applied,to the NIM BIN, the multichannel analyzer and-the calculator.

(3) For calibration purposes and.for normal counting.

the. thyroid detector is ncrmally positioned-vertically at marker 21. The-horizontal position should be as close to the individual or source as possible. If this position is not reasonable, adjust vertically and horizontally so that.the detector is positioned just under theEindividuals chin.

(4) The chair has 2 motor driven controls to raise the seat vertically and move the~ chair horizontally.

The vertical adjustment is normally at marker 14 for calibration and counting, unless the subjects

- lungs do not appear lined up with the' lung

- detector (located on the back cast of the chair).

(5) The horizontal control should be in the normal-position so the subject can base control over'the forward and 7 reverse mation of the chair by-utilizing the permissive _ lover located'beneath the subjects left hand. The forward position is fg normally at marker 3 but adjustments should be t made if necessary.

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(6). The marker positions should be'en'tered into the' computer-pecgran when they are called for.

d. Acquiring Spectrum:

(1) Sel'ect any one of the~threc memory segments by pressing the ADC-pushbutton. .Fress the ERAS button and INIT button to clear spectrum of any stored data for each ADC segmen't. Repeat the above process to clear the other two ADC's.

(2) Type in AU-1 and press RETURN-to acquire a ~

spectrum.-

e. Analy:ing Spectrum (1) Using the 9E458 calculator type in LOAD "BCGRAP:H7" an d RUN. Input data as required,,by the display :tatements. See program document description for details if needed.

(2) Af ter acquiring the 'spectrwn, input into the computer the ADO number and group .

(io(1,1)(1,2):1,3) or (2,4) anc press continue and f~}

N- the 9345.will i2ad the spectrum from the~MCA. -The 93459 Thermal Printer will provide a hard' copy of the resul ts From the spectrum.

4. Interpretation of Results tj0TE Refer to ANSI N343-1978 for additional details.

Both the Torso and Lung Detectors identify (11) eleven isotopes of interest. The isotopes are Ru-103, Ba-190, Ru-106, Cs-137, Zr-95, Cs-134, C;-52, Mn-54, Fe-59, Zn-65 and Co-60. These isotopes are of major ~ interest-because at

- their long. half life (s) and abundance.

When the analysis is complete the technician performing the Whole Body Count (W.B.C.-} will review tne printout.for any isotopes or unknowns which may have been identified or flagged. IF.any were identified the cause vill be investigated. Things to look For might include: -(l) possible external contamination on the aerssns clothes or on their skin. To confirm this, the persor needs to shower and get another count in a disposable paper suit or other u /"$ non-contaminated clothing. (2) Contamination on the Whole

( ). Body Counter itself. To confirm this do a WBC on the empty

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If an unknown was flagged'the technician may run the8 CRAP" program which allows the technician to identify and quantify unknown peaks. -

Once it has been determined that the contamination was not external _or. contamination on the Uhule Body Counter itself, the contamination should be considered. internal and cased on the % derived organ burden (% D.O.G.; the following act.on should be taken.

If % D.O.B. is greater than 10% the results shoulo be stored on the computer and the individual should be recounted -to .

determine his equivaler.t 50 year dose in mrem. The individual should return within two weeks for a follow up count and every 2 weeks thereaftec until, (1) the % 0.0.B.

decreases to less than 5% D.O.B. and, (2) the effective half life has been established. After this the yearly program can be reestablished. v.

In addition, the W.B.C. p rin tout ( s ) should be reviewed for accuracy and errcrc and a bicassay program should be established _(i.e. collection of urine samples) asfper *

,_; HNP-E021. The Lab Foreman ar Supervisor shall be consulted j i to determine whether work restrictions (i.e., individual

'- should not be allowed in R.W.P. areas) or referrals for therapeutic treatment are required (i.e. grea ter than 100%

D.O.B.) Refer to HMP-SO21 Section F for work restrictions.

He should also dctormino the cause of the contamination (i.e. individual may need additional training, respiratory protection program may need re.asing, air sampling program.

may need revising, etc.) and take corrective action 2F necessary.

NOIs If the % D.O.B. is greater than 10% the individual should be immediately surveyed thoroughly for external contamination.

-If the individual was externally-contaminated then another whole body count should be performed. .If the second result is demonstrably less than the first, thereby indicating that external contamination may have been a contributor, further showering and recounting should continue until two consecutive results indicate no significant change. If the results are still greater than 10% then the deposition must be considered to be partly internal and an indirect bioassay i

should be followed immediately. If individual is

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\- - terminating or leaving Plant Hatch a Lab Foreman or Supervisor should discuss follow up steps with the individual before he leaves.

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_ ,_ See Title Page 8 of 14 (V 1 tIf %D.O.d. is greater than 1% but less than 10% D.O.B. the results should be stored cn the computer and the individual' should be recounted to determine his 50 fear Jose in mrem.

The individual should re't' urn within 2 wechs for a rolicw up count and every 2-weeks thereafter until the % 0.0.8. is less than 5% D.O.B. and the c Ffec tive halt life aac been established er as directed otherw!se by the Department Superintendent cr manager. AEter :his the yeaily program can be reestablished.

In addition, the W.B.C. printout (s) snould be reviewed for accuracy and errcrs. The Lab Foreman or Supervisor should determine if 'l) urine samples are necessary, (2) work restrictionc are nccesscry, and (3) retraining of individual is necessary. ' Refer to HMP-SO21 Section F for work restrictions.

If % 0.0.B. is lecs than 1% D.O.B., the results should be stored on the computer. The cause fcr the internal contamination chould be determined and corrective actions taken. i'f necoccary, and the individual should be made aware of the contamination. Con: ult Lab Foreman or Supervisor to see if other than yearly W.S.C.'s should be done. Some low ,

r"w level C -137 contaminatisn :culd be caused by consumption of

(_) wild game such as deer, squirrel, quail, etc. tnat consumed Cs-13' from the fallcut of atom bomb blasts in previous years. Norm:lly, the cccpu ter prin touts are stored in the individual'c decimetry fils.

5. ~ Daily Calibration
a. Verify that d$tactcrs and~cci.trols are operating as per section 3., Operatier. af. Instrwnen ts.
b. . Remove the chair cu;hions and position Ine bottom half of the Phantom in the chair. Center one of the Eu-152 calibration source: on the thyroid detector. Position.

the other two Eu-152 sources on top of the Phantom centered in front of thz Torso and Lung Detectors respectively. Then position the APT WBC Unair Model 6000 front-to-bach at 3, seat heignt at 12 and thyroid detector at 20. Then acquira ;pectrum as per-section E.3.d.(1) and (2) with a count time of 300 seconds.

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'c. Usingithe 98458 calculater' type in LOAO "GLDLi:H7" and~RUN. Input data-as requirea-by the display statements. .-The purpose of this program is to provido a means by which the~cnergy response of tne W.B.L. -

6000 may be calibrated for each detector. nrter the spectrum has been acquired including Fise well definea gamma ceaks per detector energies being 344 hav. 7'T9 Kev 955 Kev, 11CO Kew, and 1408 Kev the calculator calculates the approximato location of the' peaks and the technician is given the chance to correct the peak's centroids by computer entrf. These centroids nace used as the data points in a linear regression analysis to determine the energy coefficients (t.e. .

energy offset (Kev) and energy gain (Kev / channel). The Technician ic given a chance to store these energy coefficients for daily use. The print out is stored as the " Daily Energy Calibration Program" of this procedure in Documentation.

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6. Annual Calibration NOTE gy Normally the W3C; will oc calibrated with four

(,j icotopas;.Ce-139, Y-22. Sn-;;3 and Cs-137. Consult the Lab Foreman as to any :hange. in the'above. Refer to ,

Reference No. 17 For c.rectians to the proper operation.

of the computer prcgrdm;.

a. Verify that detectoro and control are operating as per section 3. , Opera tion of Instrument.
b. Using the 93458 calculator type in load "6CECAT:h7" or "BCLIB:H7 and RUN. Input .da ta as required by the display. The purpose of _ this program is to store data for the calibration standards to be used by the standard calibration program. Da ta input will consist of Isotope Name, Enorgy, Ascay Date. Dis /sec., Gamma Fraction and Half-Life For each source used in the calibration.
c. Remove the chair cushion; and load the lower torso of the phantom with three one liter bottles of calibration standard. Set the upper torco part of the phantom on the lower part. Load the phan tum wi th two one liter bottles of calibration standard, insert tops onto the phantom. Insert the. thyroid phantom and load with one 15 m1 vial of calibration standard. Move chair into standard' calibration posi tion.

=h b# Acquire a 300 recond spectrum for all detectors.

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NOIE For all counting on the WGC-60GO chair, .

the front to back should be se t at 3, the seat height at.14 and thyroid detector at-21.

d. Using the 33'.50 calculator type in LOAD "BCSTND:H7" and RUN. Input' data as required by,the display statement.

The purpose of this. program is to compare the total observed counts produced.by a calibration standard with the known amount of'the particular isotope used to ,

generate the-spectrum'which allows the determination of' the efficiency of the system.for. detection of the isotope.

NOTE-w.

(The lower' torso and thyroid are counted in conjunction and a'seprate count is done for the lung detector without-the source being.

placed in the Phantom Torso and Thyroid, perform'section b.c for each). The sources a) 7--

~'

used'are from section C Standards. As a result both the eFFicicncy and resolution are st: cod for each isotope .cor-each detector. i

e. After completing step c., then type in LOAD ' BCEFF:H7" and RUN. Input data a ' required by display statements. The purpose of this program is to calculate the efficiency results From the efficiency stored in step (d)_ for each detector (i.e. efficiency as a function of energy). These. efficiency parameters are stored for each detector for use by-the "BCGRAP"
. program.

~

I

f. After completion of step e., then type in LUAD-

. "BCRES:H7".and RUN. Input data as required by display statements. The purpose of this program is to' calculate.the resolution results from the resolution stored-in step d. for each detector (i.e. FWHM (KEV) as a function of energy (KEV)). The resolution parameters are stored for each detactor for use by the "BCGRAP" program.

g. The calibratian data will be a computer printout titled (Daily Energy Calibration Program) and stored in

- documentation after the Lab Foreman okays its release

~Y to documentatien.

! ' '(d .

1

manual le t L
. .=om E.:1. Hitch Nucirr Plcnt aaoaaas ~o HNP. 8134 See Yitle'Page uvision so

..i Georgia Power A ...

See Title Page 11 of l' L

'V 7.: Source Che~ck:

The Torso and Lung detectors will be cource checked.on.a routine basis._ The activity detec ted by tne detectbrs will-

~

be ccmpared with actual activity. The ro ta tion ano calibration of. standards will be maintained by toe Oosimetry Staff. The standard' calibration sources-are the' isotopes listed in section D., Standards.

9. Guarterly Cros check Analysic
a. On a quarterly basis, a vendor will ship us an unknown

' sample to be loaded and counted in our wnole body -

phantom.

b. The phantom will be counted, with. sources loaded, in the routine fashion (see section E.3, Operation at Instrument).

G.

c. Upon completion of measurement of these unmarked sources, the plant personnel will report by Figure 1 (Crosscheck Report) the results for the source values to the vendor. ,

es i

s j' d. The sources.will also be returned to the vendor upon completion of the measuremen ts.

c. The vendor will compare the reported values.to the actual cource valucc to de te r.nine if the reported values are'in agreement with the actual values.

f .- The basis for this agreement will be the NRC's

" Criteria for Comparing Analy tical Measurements",

Figure 2.

_g. After the evaluation of'the1 plant report, the ' vendor-will write a letter rcport to the plant certifying the.

agreement or non-agreement with the'known source. values.

h. This letter frcm the vendor will serve as evidence of calibration and precedure verification and stored ins

- Documentation as the "Cro scheck-Report".-

i. This procedure will be repeated ~cach time that a verification'ic' required.

4 rN 6

L .. . n . s r _ . .

- - ao= E. l. Hatch Nuclear Plant a==xa ~o HNP. 8134 52o Title *Paga aevisio~ ~o o.1l Georgia Power d . .. ~e See Title Page 12 of 14 O F. FREGLENCY OF bHOLE BODY COLNTS All personnel assigned to Plant Hatch who may enter bio-assay areas should have a whole body' count as soon as practicable following assignment (before entering the area). This will be the baseline count. A final count should be performed prior to termination or transfer from Plant Hatch. These personnel should have additional Whole Body Counts on a yearly basis. However, if internal contamination is suspected, more frequent Whole Body Counting should be done as recorrmended by a Lab Foreman or Supervisor. ,

All nonfacility personnel (i.e. not assigned to Plant Hatch) including visitors and contract personnel who may enter bio-assay areas (i.e. R.W.C.U. pump rooms, Airborne Areas, etc.) should have a preliminary count (before entering the area) and a final count (after leaving the area for the last time) unless otherwise directed by a Lab Foreman or Supervisor.

a I

Any visitors or contract personnel not entering bio-assay areas do not need a'Whole Body Count.

1 O

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s.

i I

O l

ma nual le i L '"*"

-u ,

t~om E. l. Hr.tch Nucle:r Plant aaociou'e ~o HNP. 8134 Sao Title Pega .:evision ~o 5

o.1 GeorgiaPower d ..m ~o 13 of le A

( See Title Page-FIGURE 1 CROSSCHECK REPORT -

CROSSCECK REPOR_T SOLRCES USED: ( )Co60 ( )Cs137 ( )Other SOLRCE LABEL: ,

W.B.C. LOCATION: O Protected Area Q Building 10 RESLA.TS:

Lungs and GI uci ,

Thyroid uti rh i

COPFARISON: ( ) Agreement ( )Non-Agreement REMARKS:

l l

COPPLETED BY DATE l

19F-8134 ROS Figure 1 ma nual l e t

C- aa ao= E. l. Httch Nuclerr Pl:nt oamae ~o

.. .. . HNP. 8139

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See' Title 1Page uvisio= ~o oM Georgia' Power d ...

ya. See Title Page 14 of 14

~l ) .

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FIGURE s CRITERIA FOR. CCMPARIGG_6NALYTICAL MEAEUF;difsylg ,

This attachment. provide criteria for comparing results of capability te'sts and verification measurements. The criteria are,c'ased on an empirica1' relationship which co;r. bines prior experience anc the accuracy needs of.this program.

In these criteria, the judgment limit, are. variable-in relation.to the comparison of.the NRC Referen:c Laboratory's value to its -

associated uncertainty. 1.s the ratio, referred tolin this program as

" Resolution" increasec, the acceptability of a licensee's measurement should be more. selective. Converselj, poorer agreemen t must be considered acceptcble as the resolution decreases.

LICEN5EE VALUE RATIO = -------------------

NRC REFERENCE VALUE

/~' FOSSIBLE POSSIBLE

(_ - .

-PE50LUT_IJN 3 SCREEMENT AGREEbENT-A AGREE!fENT B.

3- 0.4 - 2.5 0.3 - 3.0 No Comparison-4-7 0. 5 2.0 0.4 - 2.5 0.3 - 3.0 8 - 15 0.6 - 1.EE O.5 - 2.0 0.4 - 2.5 16 - 50 0.75 - 1.33 0.E - 1.66 0.5 - 2.0 51 --200 0.80 - 1.25 0.75 --1.25 0.6 - 1.66

'200 0.25 - 1.18 0.E0 - 1.25 0.75 - 1.33 "A" criteria are~ applied to the folloning analyses:

Gamma Soectrometry where principal gam.:.a ene rgy used for identification is greater than 250 Kev.

Tritium analyses of liquid. samples.

~

"B" criteria are applied to the following analyses:

Camma Spectrometry where principal gam.na energ) used for' identification ic Iccs'than 250 Kev.

'89 90

Sr and Sr Determinationc.
]f3 f

_ 'Grose Beta where camples are counted on the same date using the same reference nuclide.

manual n o t

ras-Georgia Power Company

- Post Office Box 439 Baxley, Georgl0 31513 Yelephone 912 367-7781 912 537-9444 Edwin 1. Hatch Nuclear Plant December 17, 1934 DCS84-156 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 Gentlemen:

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

v'

. i LCG '

/

E. C. Torrell

' Document Control Supervisor ECS/klm xc: U.S. Nuclear Regulatory Comission Office of Inspection and Enforcement Region II Suite-2900 101 Marietta Street, N.W.

' Atlanta, Georgia 30323 file-

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