ML20116D440

Revised Emergency Procedures HNP-8109 Re Continuous Air Monitors Models AM-3D & AM-33-1,HNP-8122 Re Radiation Monitor Model RM-16 & HNP-8146 Re Rascal Portable Rate Meter-Scaler/Model PRS-1 Operation & Calibr

ML20116D440
Person / Time
Site:	Hatch
Issue date:	04/23/1985
From:	Sorrell E GEORGIA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
DCS-85-39, PROC-850423, NUDOCS 8504290413
Download: ML20116D440 (30)

Text

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Q PROCEDURE .

Continuous Air Moni t or s Models AM- 30 and AM-33-1 Opfra-tion and Calibration PROCEDURE TITLE UNP-8tO9 .-

PROCEDURE NUMDER

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RESPONSIDLE GECTION SAI~ETY RELATED ( X ) NON-DAFETY RELATED ( )

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CONTINUOUS AIR MONITORS MODELS AM-3D AND AM-33-I OPERATION AND CALIBRATION A. PURPOSE To ensure that the instruments are calibrated properly and to provide operation guides for the user.

B. FREQUENCY

1. Daily - Observation check

2. Weekly - Source and test check

3. Semi-annual - Calibration C. REFERENCES l

1. NMC Air Monitor Model AM-3D Instruction Manual, TDC #0500

2. NMC Air Monitor Model AM-33-1 Instruction Manual, TDC #0501

3. Determination of Concentrations of Airborne Radioactivity, George L. Helgeson, Health Physics Journal 1963 Vol. 9, pp.

931-942, TDC #0502

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D. SAFETY

1. Observe Radiation Protection Procedures. l

2. Observe Georgia Power Company Safety, Section "0".

E. TEST EQUIPMENT l

1. Minipulser MP-1 or equivalent

2. Cl-36 check source and source holder 1

3. Ba-133 check source and source holder

4. Magnehelic gauge F. DESCRIPTION OF INSTRUMENT The NMC models AM-3D and AM-33-I monitors use a continuously moving filter paper so that replacement of the filter is required only infrequently. The function of these instruments is to measure the radioactivity from air particulates and gaseous activity by concentrating these particulates on a filter,

{} detecting, and graphing the activity on a graphic recorder.

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In the AM-3D and AM-33-1, air is drawn through a special filter paper at a controlled rate. The build-up of activity on the filter paper is detected by a Geiger-Mueller detector which, in turn, operates a count ratemeter, solid state voltmeter alarm system and a graphic recorder. The alarm system in the AM-3D and AM-33-I particulate channel provides two levels of alarm based i upon the level of radio activity. A high level alarm provides l for continuous sounding of a loud bell or sonalert and operation l of a red lamp. The low level alarm is used as a fail-safe indicator that the detectable radioactivity is below that l expected in a properly functioning instrument. This provides a continuously lighted amber lamp.  ;

I In addition to particulate air activity, the model AM-33-1 also monitors the filtered air for iodine and gaseous activity. These gases are collected by a fixed activated charcoal cartridge. The Iodine-131 activity build-up on the charcoal cartridge is detected by a scintillation detector. The scintillation detector is coupled to a single window spectrometer system. The spectrometer is provided with a window-width control and high voltage control that is set at the Iodine-131 energy base.

The AM-33-1 incorporates a discriminator system, count ratemeter, solid state voltmeter alarm system and a graphic 2 channel

(<-)s recorder. The AM-33-1 iodine channel has a single (high) alarm system based on the level of iodine and gaseous activity deposited on the charcoal cartridge. This high level alarm provides for continuous sounding as previous described.

G. DESCRIPTION OF CONTROLS

1. External Controls

a. Master switch - Turns power on to the counting ratemeter and moving filter drive unit. l

b. H.V. switch - Turns on high voltage for detector operation.

c. H.V. Test switch - Displays the detector voltage on the ratemeter (AM-33-1).

d. Input Mode Switch - In the TEST position, inserts a 3600 CPM signal to the ratemeter input for instrument check. In the OPERATE position it places the GM detector in service for normal operation.

e. D, and DS switch positions are the boundries of the spectrometer window and operate from the gamma

() scintillation probe, (AM-33-I).

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g. Window Width Switch-Provides 11 window levels from 0 to i 5%. The instrument is optimized for'the 5% window (setting, 5) . This setting should be used unless there is significant interference from some other emitter with an energy peak close to that of, iodine 131. ,

h. Alarm Reset Pushbutton - Resets the alarm circuit after alarm condition.

i. Meter Reset Pushbutton - Resets the meter to minimum when. depressed.

j. Blower Power Switch - Turns blower ON or OFF.

k. Continuous-Stepwise Switch in CONTINUOUS position, filter paper advances continuously. In STEPWISE position, filter paper advances only when the Fast Advance pushbutton is depressed.

1. Magnehelic gauges:

(1) AM-3D-Indicates air flow rate through filter paper. An adjustment screw on the gauge provides adjustment of the flow rate. Clockwise adjustment increases the flow rate.

(2) AM-33-I-(Photohelic) Indicates air flow rate through filter paper and charcoal cartridge assembly. Flow rate adjustment is accomplished by dual set point controls. The left set point control governs the minimum flow rate setting.

! The right set point control governs the maximum flow rate setting.

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m. Flow indicator lamps- mounted on the right end of the cart. Yellow lamp on continually indicates blockage of filter paper. Red lamp on continually indicates rupture, loss of filter paper,~or a leak in the system.

2. Internal controls l a. H.V. Adjust - Allows setting of high voltage on G.M. I  ;

tube.

i b. High potentiometer - Adjusts high alarm setpoint on t i alarm assembly module.

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V c. Low potentiometer - Adjusts low alarm setpoint on alarm assembly module.

d. The AM-33-I monitor is labeled "I" or "P" to indicate iodine or particulate detectors adjustment.

e. Bias potentiometer - Calibrates low end of ratemeter scale. ,

f. High potentiometer - Calibrates high end of ratemeter scale.

g. Low potentiometer - Calibrates mid-scale of ratemeter scale.

H. OPERATION OF INSTRUMENT l

1. Install filter paper roll per instructions in paragraph 5.7.

of Instruction-Manual (AM-3D) or paragraph 2.1 (AM-33-1).

Also insert the charcoal cartridge in the detector shield plug. (AM-33-I).

2. Switch the Continuous-Stepwise Toggle switch on filter transport mechanism to CONTINUOUS.

a. The filter paper speed can be varied for either monitor as per paragraph 4.7.1 (AM-3D) or paragraph 1.3 and programming key on Drawing # D005923 (AM-33-1), but should normally be set at one inch per hour.

3. Plug the instrument into a 115 VAC receptacle.

4. Switch the Blower Power switch to ON. Adjust air flow rate to 5 1 5 CFM using adjustment on Magnehelic gauge after about 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of operation (AM-3D). Adjust AM-33-1 Photohelic gauge flow set point controls to 3.5 1 5 CFM and l readjust after 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> if necessary.

5. Switch the Master Switch to ON.

6. Place the Input Mode switch to TEST and observe count ratemeter and recorder. Reading should be 3600 + 400 CPM.

If not, report findings to a Health Physics Foreiiian.

7. Switch the High Voltage switch to ON. The red indicator light should be on.

8. Return the Input Mode switch to "0P" (AM-3D) or "N" (AM-33-I).

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t I. INTERPRETATION OF INSTRUMENT RESPONSE l

1. Background Radioactivity The normal background before collecting ma'y be in the vicinity of 50 CPM. Upon collecting, this count will rise l rapidly due to the presence of radon gas and its radioactive daughters in the air. The count should rise to a level .

between 100 and 5000 CPM, depending upon the environment, the air cleaning used in the facility, and atmospheric l conditions at the time. This is an exceedingly sensitive instrument and a high rate of count from radon and its progeny is to be expected. (Particulate activity-CAM only).

A fail-safe alert level in set at 10-50 CPM. Whenever the l counting meter indicates below this level, the amber lamp on top of the instrument cabinet will light. This is to show that the instrument is operating below the preset level.

The amber light will also remain lit af ter changing or upon advancing the filter paper.

2. Static Conditions Whenever the concentration of airborne radioactivity has

! been essentially stable during the sampling period of concern, the following formula applies:

C = 5.3 x 10'dAs Fga Where: C = concentration in xCi/cc A = count rate in CPM s = speed of filter paper in in./hr.

f = Flow rate in SCFM g = detector efficiency a = diameter of suction area I

Since the filter paper speed (one inch per hour), flow rates (5 SCFM for the AM-3D and 3.5 SCFM for the AM-33-1),

diameter of suction area (2 inches), and efficiencies (0.20 l for the AM-3D and 0.08 for the AM-33-1) are assumed constant, the formula can be simplified as follows:

C C= = 2.65 9.46 xx 10 "S xA 10-' xA (AM-3D)

(AM-33-1)

From these formulas, a conversion from count rate to l concentration can be obtained. Conversion charts should be I attached to each unit. To estimate concentration, observe

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k' the count rate on either the meter or the chart recorder, and find the corresponding concentration on the chart.

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3. Rising Concentrations Whenever the concentration of airborne radioactivity increases significantly over a relatively short period of time, the following formula applies:

C = 1. 6 x 10~" x A A Fg Where A A = Rate of rise in CPM per minute.

NOTE Rate of rise is determined by subtracting the

" static" count rate from the count rate at the time of interest and dividing the difference by the elapsed time between the two readings.

Considering the flow rates and efficiencies of the AM-3D and AM-33-I, the formula can be simplified as follows:

C = 1. 6 x AA (AM-3D)

C = 5.71 x 10-"" 10- x xAA (AM-33-I) i O From these formulas, a conversion from rate of rise to concentration can be obtained. Conversion charts should be attached to each unit. To estimate concentrations, determine rate of rise and find the corresponding concentration on the appropriate chart.

4. Estimation of Airborne Iodine Concentrations l

a. Static Conditions When the average Iodine concentration has been essentially stable, the following formula may be used to estimate concentration:

C = A x 5.77E~H (AM-33-I) .

tg l Where: C = concentration in xCi/cc A = average CPM ts = sample time of interest in minutes O

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b. Rising Iodine Concentrations When the Iodine concentration has been stable and then suddenly increases, the following formula may be used to estimate the average concentration ~during the increase:

C = AA x 5.77E (AM-33-1) at Where: C = concentration in mci /cc A A = average rise in CPM a t = sample time during rise From the above formulas, a conversion from count rate or average rise in CPM / min to concentration can be obtained. Conversion charts should be attached to the AM-33-I. To estimate the concentration during static conditions, observe the count rate and read the corresponding concentration on the chart. To estimate the concentration during periods of rise, determine the average rise in CPM / min and read the corresponding concentration on the chart.

O nore All formulas in the procedure are examples and the actual conversion charts generated to convert CPM to xCi/cc will depend on the characteristic ef ficiency of each detector.

5. Other observations for moving and fixed filter CAMS.

a. Down trend in chart recorder.

I (1) This could be due to long half-life activity which has stopped forming and the filter is l

I moving out of the detection area.

(2) A decrease in long half-life airborne concentrations.

l (3) Short half-life material decaying, showing a N stop or decrease in activity.

(4) A combination of these reasons.

b. Horizontal line straight across chart.

p (1) Sudden increase in background from sources or Casks.

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(3) CAM Filter paper not moving, activity buildup.

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J. CAM LOCATIONS'AND OPERATION

1. The CAM units should be placed in areas where the occupation factors and the possibility of airborne problems are most ,

predominant.

2. If possible the CAM's should be placed near air exhaust vents to better assess overall airborne concentrations.

3. The CAM's should be equipped with an air sample intake extension in that the sample collected is representative of a " breathing zone" for personnel.

4. The diatance from the airborne source should also be taken into account.

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5. The alarm level shall be set in the following manner.

a. The CAMS shall be operated for a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period to establish a relative Radon-Thoron equilibrium. l

b. The CAM alarm point is set at the administrative level. The actual alarm setting will vary depending on Radon-Thoron concentration, area background and CAM ef f ic iency .

c. To determine the alarm setpoint in CPM, refer to the CPM to mci /cc conversion chart (characteristic for each unit depending on the detector ef ficiency) . To obtain the setpoint read the CPM that corresponds to 2.0 x e 10'q mci /cc and add this number to the background count i rate of the unit.

I K. CALIBRATION AND CHECKS l

1. Daily or Shift Check t a. Ensure the AM-3D and AM-33-I air flow is maintaining a

.5.0 1 5 and 3.5 i .5 SCFM flow rate, respectively;

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b. Observe the chart and ensure the pen is inking. l i

Determ'ine the present air concentration using the c.-

appropriate conversion chart. If any spikes or a rate of rise is indicated, determine the concentration

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during the rise and notify an H.P Foreman (provided the

. rate of rise is or was in excess of administrative i limits).

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d. Note the flow rate, concentration, date and time on the l chart paper and initial the chart paper.

2. Weekly Check (AM-3D)

a. Check flow rates of CAMS and CIM-CAMS to assure proper flow on Magnehelic or Photohelic gauges and record on Data Sheet 1, Data Package 1.

b. Place the Input Mode switch to TEST and observe ratemeter and recorder. Reading should be 3600 + 400 CPM. Record results on Data Sheet 1, Data Packag'e 1.

Mark " TEST" on the chart paper, turn the pump off, and open or remove the detector shielding.

c. Ensure there is a sufficient filter paper supply (24 inches per day). l

d. Place radioactive check source provided to the center of the detector and check the instrument response and alarm setpoint. Record results and complete Data Sheet 1, Data Package 1. Note on the chart paper and ensure the CPM meter and chart readout match. If the detecter l r~g efficiency is low, calibrate the CAM in accordance with (j the semi-annual checks prescribed below. I For the Model AM33-I CAM, place the radioactive check source on the end of a metal rod and insert the source gently into the detector chamber. Ensure the source is l centered and against.the detector window. Proceed as mentioned in the previous paragraph.

e. Af ter completion of the above checks return the CAM to operation and note on the chart paper the time, date and calibration completed by initial.

f. The CIM (AM-33-1) may be source checked in the following manner.

(1) With the pump off, remove the filter holder-detector shield plug, remove the charcoal cartridge, and place the Ba-133 check source in the filter holder-detector shield plug. Reinsert the detector shield.

(2) Check the instrument response and alarm setpoint.

Record the results and complete Data Sheet 1, Data Package 1. Note the results on the chart paper and check the count rate meter and chart readout i coincide. If the detector efficency is low, calibrate the CIM in accordance with the semi-annual checks prescribed below.

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3. Semi-Annual Calibration.

a. Test Shop will calibrate the Magnehelic or Photohelic on the CAM or CIM-CAM (MWO's are to be written by H.P.

Instrument Techs) semi-annually,

b. Note on the chart paper the semi-annual calibration is occurring. Turn the instrument high toltage off and remove the probe connector.

c. Connect the output of the Minipulser from positive (red lead) to pin "F ' of the input connector (located on <

left side of probe connector), (AM-3D). Ground the l other lead (black) to the frame. Remove the probe connector to the scintillation detector (AM-33-1) and connect output of the Minipulser from positive (red lead) to pin "F" of the connector.

d. Switch the input mode on the counting ratemeter to "OP" or D.

e. Set the minipulser at 1.0 volt amplitude. Set the counting rate of the minipulser to 100, 1000, 10,000, p 40,000, and 800,000 CPM. Adjust the bias, low and l v high-end controls as necessary to correspond to the input pulse being generated.

NOTE Am-3D's scale reads to 50,000 cpm only.

Disreguard 800,000 cpm step.

f. After this calibration insert the check source as prescribed in K.2 and perform a plateau check. l (Instrument high voltage back on). See the instruction manual Section IV 4.4. If the high voltage plateau has not drifted and instrument efficiency is within 10% of the last efficiency check, return the instrument to operation. (AM-3D).

g. The CIM detector Iodine 131 operating voltage is set by inserting the Ba-133 source as prescribed in Section K.2.d. With the input mode selector switch in "N" position, adjust the 10- turn high voltage control until the CPM meter indicates the optimum value. Then set the high voltage control 1% lower than indicated reading.

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i. Complete the necessary forms (see attached forms).

NOTE The AM-3D and Am-33-1 are designed to measure I general air trends and changes ,in these trends.

Any unusual rises in airborne activity should be confirmed by additional air sampling (high or low l volume); isotope identification should be made and documented (by Geli count).

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DATA PACKAGE I (Data Sheet 1)

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DOCtJMENT TRANSMITTAL 7

TRANSMITTAL NO: Nh_' M--/_f_2 DATE: _ - / _~_ _

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PROCEDURE DATA PACKAGE DOCUMENT NO: HNP-8109-2 ,

SERIAL NO: R13-MPL NO:

RTYPE: G15.14 XREF:

TOTAL SHEETS: 2 s

FREQUENC'.': Semi-Annually COMPLETED BY:

DATE COMPLETED:

I HAVE REVIEWED THIS DATA PACKAGE FOR CCMPLETENESS AND AGAINST ACCEPTANCE CRITERIA IN ACCCRDANCE WITH HNP-830.

ACCEPTABLE UNACCEPTABLE REVIEWED BY:

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v PROCEDURE Radiation Monitor Model RM-16 PROCEDURE TITLE HNP-8122 PROCEDURE NUMBER Lab RESPONSIBLE SECTION SAFETY RELATED ( X ) NON-SAFETY RELATED ( )

APPROVED APPROVED REV. DESCRIPTION DEPT. GENERAL DATE MANAGER MANAGER W1 6 Pages 1-7 & 9-10 -

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RADIATION MONITOR MODEL RM-16 A. PURPOSE To ensure that the instrument is calibrated properly and to provide operation guides for the user.

B. FREGUENCY Operation: As needed Calibration: Semi-Annual C. REFERENCES l

1. Radiation Monitor Model RM-16 Technical Manual TDC #0536M l ,

2. Gamma Calibrator Procedure HNP-8115

3. High Level Gamma Detector Model RD-17A Technical Manual TDC #0535A-M l ;

'~s D. SAFETY  :

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1. Georgia Power, SAFETY, Section "O".

! 2. Observe Radiation Protection Procedures.

E. TEST EQUIPMENT l

1. Gamma Calibrator l 2. Electrostatic Voltmeter

3. Mini-Pulser F. DESCRIPTION OF INSTRUMENT

1. The RM-16 is a compact extremely versatile, four decade, logarithmic read-out dose rate meter. Four decades are

' displayed on a large meter with optically coupled set points which allow high and low alarm indications without interrupting the dose rate indication.

2. The high and low points are adjusted from the front panel and are displayed on the meter scale. The two alarms can be l set anywhere on the meter scale.

() 3. The detector voltage is adjustable from 2,450-2,650V range by a rear panel control.

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4. The instrument maybe operated away from AC power source with full charge for approximately 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br />.

G. DESCRIPTION OF CONTROLS l

1. External Controls.

NOTE .

HI: Non-locking type with alarm point adjustable over the entire meter scale.

LO: Non-locking type with alarm point adjustable over the entire meter scale.

a. Alarms (1) Visual alarm:

Hi: Red lamp lights Lo: Blue lamp lights (2) Audible alarm:

( Hi: Noisy penetrating squeal Lo: None

b. AC ON lamp:

l Indicates instrument is plugged into line.

c. Power switch:

1

! Turns instrument on.

d. Batt check:

Press batt check push button switch. Meter should indicate in Batt OK area.

e. PHA/ gross:

l Toggle switch selects whether all pulses above l threshold are counted (gross) or only those that are within the window (PHA).

f. Detector:

Connection to detector, MHV series coaxial.

O N_/ g. Scaler:

Connection to external, BNC series coaxial.

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2. Internal Controls

a. Zero:

~

Multiturn pot to calibrate zero current through meter.

b. Span:

Multiturn pot to calibrate to full scale or near full scale on meter.

H. OPERATION OF INSTRUMENT l

1. Turn the power toggle switch on. Power light should light.

Meter should have a down-scale deflection and Lo alarm light should light.

2. Press Batt Check push butten switch. Meter should indiate Batt OK area.

3. With PHA/ Gross switch in the Gross position place a check source in a repeatable position adjacent to the detector to achieve an up scale reading. Note that the reading is sensitive to the position of the source. The fluctuation of 73 the meter is normal and is caused by the random nature of

() radioactive decay.

I. SEMI-ANNUAL CALIBRATION OF RM-16 WITH 0-10 R/HR METER FACE /RD-17A l

1. With PHA/ Gross switch in the gross position, turn the toggle switch on.

2. Check battery by pressing battery check button to insure it is above BATT OK LINE.

3. Put the detector in a 10 mr/hr gamma field, 100 mr/hr gamma [

field, 1000 mr/hr gamma field, and 8 R/hr gamma field respectively and check the readings. Record on Instrument Calibration Data Package in the AS FOUND column.

4. If the instrument reads within i 20% of the true gamma dose rate turn the toggle switch off, and complete Data Package

1. Replace calibration date sticker with a new one bearing the test date and the date of the next Semi-Annual calibration.

5. If the instrument does not read i 20% of the true gamma dose rate in each field continue to step 6.

( ) 6. Remove lid from Rm-16 and with the instrument in the off position remove high voltage card (P201)

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7. Connect red lead from mini-pulser to high voltage post and

_ ground black lead. Set amplitude on mini-pulser to around 5 mv.

NOTES

1. Before starting step 7, check voltage on battery in off position and insure it is greater than 6 volts. If not charge the battery before attempting to calibrate the instrument.

2. Do not at any time discharge high voltage by shorting it out, will cause damage to instrument. I

8. Turn RM-16 on, turn mini pulser on to 4,000 pulses, and 400,'000 pulses and record results in AS FOUND column.

4,000 Pulses = 100 mr/hr 400,000 Pulses = 10 R/hr If the instrument does not read i 10% of the value turn mini pulser to 4,000 and adjust zero pot until 100 mr/hr is obtained. Turn mini pulser to 400,000 pulses and adjust span pot until instrument reads 10 R/hr. Record all results

() in AS LEFT column.

9. Turn RM-16 off, replace P201 board. Turn RM-16 on, and place the detector in a 1000 mr/hr field and turn the H.V.

pot on the back of the RM-16 until the instrument reads 1000 mr/hr. Then place in a 10 mr/hr, 100 mr/hr, 1000 mr/hr and a 8-R/hr gamma field and if all points are i 20% of true dose rate complete step 4. If any of the calibration points do not fall within i 20% use zero pot and span pot as necessary to make instrument read i 20% at all points. Once' this is obtained replace lid on RM-16 and fill in AS LEFT column and complete step 4.

10. If instrument cannot be calibrated initiate re9 airs.

J. SEMI-Af4RJAL CALIBRATION OF RM-16 WITH 0-1000 R/HR METER FACE /RD-17A

1. With PHA/ GROSS switch in the gross position, turn the toggle switch on.

2. Check battery by pressing battery check button to insure it is above BATT DK LINE.

3. Put detector in about 1 R/hr, 10/hr, 100 R/hr, and 200 R/hr gamma fields respectively and check the readings. Record on

^T Instrument Calibration Data Package in the AS FOUND column.

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4. If the instrument reads.1 20% of the true gamma dose rate turn the toggle switch off, and complete Data Package 1.

Replace calibration date sticker with a new one bearing the test date and the date of the next Semi-Annual calibration.

5. If the instrument does not read i 20% of the true gamma dose rate in each field continue to step 6.

6. Remove lid from RM-16 and with the instrument in the off position remove the high voltage card (P201).

NOTE I

Before starting step 7, check voltage on the battery in the off position and insure it is greater than 6 volts. If not, charge the bat-tery before attempting to calibrate. l Do not, at any time discharge high voltage by shorting it out. It will cause damage to instru- g ment.

7. Connect red lead from mini pulser to high voltage post, and 73 ground black lead. Set amplitude on mini pulser to around 5

( m.v.

8. Turn RM-16 on, turn mini pulser on to 4,000 pulses, and 400,000 pulses and record results in AS FOUND column.

4,000 pulses = 10 R/hr 400,000 pulses = 1000 R/hr If the instrument does not read i 10% of the value turn mini pulser to 4,000 and adjust zero pot until 10 R/hr is obtained. Turn mini-pulser to 400,000 and adjust span pot until 1000 R/hr is obtained. Record all results in AS LEFT column.

9. Turn RM-16 off, replace P201 board. Turn RM-16 on, and place detector in a 100 R/hr gamma field and turn H.V. pot on the back of the RM-16 until 100 R/hr is obtained. Then place in a 1 R/hr, 10 R/hr, 100 R/hr, and 200 R/hr gamma field and if all points are i 20% complete step 4. If any of the calibration points do not fall within i 20% use span and zero pot as necessary to make instrument read i 20% at all points. Once this is obtained replace lid on RM-16 and fill in AS LEFT column and complete step 4.

10. If instrument cannot be calibrated initiate repairs.

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K. SEMI-AbMJAL CALIBRATION OF RM-16. O-1 R/HR METER FACE /RD-17A

1. With PHA/GRDSS switch in the gross position, turn the toggle switch DN. _

2. Check battery by pressing battery check button to insure it is above BATT OK line.

3. Put detector in 1 mr/hr, 10 mr/hr,'100 mr/hr, and 1000 mr/hr gamma fields respectively, and check the reading. Record on Instrument Calibration Data Package in the AS FOUND column.

4. If the instrument reads i 20% of the true gamma dose rate, turn toggle switch off, and complete Data Package 1.

Replace calibration date sticker with a new one bearing the test date, and the date of the next semi-annual calibration.

5. If the instrument does not read i 20% of the true gamma dose rate in each field continue to step 6.

6. Remove the lid from the RM-16 and with the instrument in the off position remove the high voltage card (P2Ol).

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Before starting step 7 check the voltage on the battery in the off position and insure it is greater than 6 volts. If not, charge the battery before attempting to calibrate the instrument. Do not at l any time discharge the high voltage by shorting it out. It will cause damage to the instrument. g

7. Connect red lead from mini pulser to the high voltage post, and ground black lead. Set amplitude on mini pulser to around 5 m.v.

8. Turn RM-16 on, turn mini pulser on to 4,000 pulses, and 400,000 pulses record results in AS FOUND column.

4,000 Pulses = 10 mr/hr 400,000 Pulses = 1000 mr/hr If the instrument does not read i 10% of the value turn mini pulser to 4,000 and adjust zero pot until 10 mr/hr is obtained. Turn mini pulser to 400,000 and adjust span pot until 1000 mr/hr is obtained. Record all results in the AS LEFT column.

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(~s) u Turn RM-16 off, replace P201 board. Turn RM-16 on, and 9.

place detector in a 100 mr/hr gamma field, and turn the high voltage pot on the back of the RM-16 until 100 mr/hr is obtained. Then place detector in a 1 mr/hr, 10 mr/hr, 100 mr/hr, and 1000 mr/hr gamma fields. !c all points are i 20%

complete step 4. If any of the points do not fall within i 20% complete step 4. If any of the points do not fall within i 20% use span and zero pots as necessary to make instrument read i 20% at all points. . Once this is obtained replace lid on RM-16 and fill in AS LEFT column and complete step 4.

10. If instrument can not be calibrated initiate repairs.

L. SEMI-ANNUAL CALIBRATION OF RM-16 WITH HP 200 DETECTOR

1. With the PHA/ Gross switch in the gross position turn the toggle switch on.

2. Check the battery by pressing the battery check button to insure it is above the battery ok line.

3. Using an electrostatic voltmeter adjust the high voltage to

- 550 volts.

G 4. Place the detector in a gamma field that will provide 1/4 scale and 3/4 scale readings respectively and record the readings in the As Found column.

5. If the instrument reads i 20% of the true gamma dose rate turn the toggle switch off and complete Data Package 1.

l Replace the calibration sticker with a new on bearing the next calibration due date.

6. If the instrument does not read i 20% of the true gamma dose rate in each field continue to step 7.

l 7. Place the detector in a gamma field that will provide 1/4 full scale, adjust the zero pot so that the instrument indicates the proper reading.

8. Place the detector in a gamma field that will provide a reading of 3/4 scale. Adjust the span pot so that the instrument indicates the proper reading. Steps 7 and 8 may l need to be repeated for proper adjustment.

9. Record on Data Package 1 in the As Left column the resulting readings.

10. Place a calibration sticker bearing the next calibration due

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v date on the instrument.

11. Place a sticker on the instrument that indicates that it has been calibrated for use with a HP 200 probe.

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.~ See Title Page 9 of 10 PROCEDURE DATA PACHAGE i

. DOCUMENT NO: Hrf-8122-1 SERIAL NO: R06-l@L PO:

RTYPE: G15.14 XREF:_

TOTAL SFEETS: 2 i

FREQUENCY: Semi-Annual COMPLETED BY:

DATE COMPLETED:

l I HAVE REVIEWED THIS DATA PACMAGE FOR COMPLETENESS APO AGAINST ACCEPTANCE CRITERTA IN ACCORDANCE WITH HrP-830.

ACCEPTABLE t.NACCEPTABLE l

I REVIEWED BY:

DATE REVIEWED:

,REMARMS' Page 1 of 2 Hlf-8122 R06 FIGURE 2 Page 1 of 2

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DATA PACKAGE 1 RM-16 CALIBRATION DATA SK ET ffL Number Serial Number Location ~

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CALIO. ACTUAL ACTUAL AS AS COUNT DOSE FOUND LEFT MAINTENANCE REQUIRED SOURCE RATE RATE

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A P PR OV E D APPROVED REV. DE SCRIPTION - DEPT. G E NE RA L DATE MANAGER M AN A GE R 1 DELETE - NO  ! /' - //

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Ola Power Company Post Office B:x 439 Bax!;y, Georgia 31513

- Telephone 912 367-7781 912 537-9444 Edwin 1. Hatch Nuclear Plant April 23, 1985 DCS-85-39 PLANT E. I. HATCH Emergency Implementing Procedures Docket Nos. 50-321/50-366 Document Control Desk United States Nuclear Regulatory Commission Washington, DC 20555 Gentlemen:

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

N E. C. Sorrell /

Document Control Supervisor ECS/kim xc: U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement

. Region II Suite 2900 -

101 Marietta Street, N.W.

Atlanta, Georgia 30323 1

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