ML20076G648

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Public Version of Rev 4 to Emergency Plan Implementing Procedure 5.7.17, Dose Assessment
ML20076G648
Person / Time
Site: Cooper Entergy icon.png
Issue date: 08/04/1983
From: Mcdonald B, Morgan C, Pilant J
NEBRASKA PUBLIC POWER DISTRICT
To: Jay Collins
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20076G646 List:
References
EPIP-5.7.17, NUDOCS 8308310481
Download: ML20076G648 (32)
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Text

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COOPER NUCI. EAR STATION OPERA 110NS MANUAL I

' EMERGENCY PLAN IMPLEMENTING PR02ELURE 5.7.17 DOSE ASSESSMENT s i I

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'I . PURPOSE

! ,g ,, To provide an outlir.e of procedures for the proper physical set up of

, equipment, and operating instructions for the computerized NPPD Emergency

,n' -

Preparedness - Atmospheric Dispersion Model - Interim Version.

Jhould this program become inoperable, a manual backup system will be 4 utilized. Therefore, this procedure also provides instructions and calcu-k- _ _ latiocs necessary to predict off-site dose rates and integrated doses based g

i upon' actual meteorological data, release rates, and dispersion factor

't . over3ays.

This procedure also provides means for on shif t personnel to quickly s ' predict off-site dose rates and integrated doses based on meteorolost:el

. ~; data, release rates, and dispersion until emergency personnel arrive to ese the more accurate computerized or manual backup method of dose assessment.

II. DISC 1'SSION f

,, "This procedure is intended to: ,

A. Ervure the proper physical set up of the appropriate computer terminals j ,

- in the proper locations.

1 1 B. Provide personnel with appropriate instructions in the use of the computer terminals in order to successfully run the Atmospheric Dis-i{ ' persion Model - Interim Version.

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C. Provide a manual backup means of adequately addressing dose assessment should the computerized model be inoperable or unavailable.

D.Section VIII. of this procedure is divided into three parts:

1. Part A. describes the operation of the ec=puterized dose assessment model.
2. Part B. describes the hand calculated dose assessment method, should the computerized model fail.

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3. Part C. describes a method that may be used by on-shif t personnel to quickly establish a conservative dose assessment.

l III. REFERENCE MATERIAL l

A. Users Guide for EPM 2 - Emergency Preparedness Atmospheric Dispersion Modei; prepared by Dames & Moore.

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1 8308310481 830825 PDR ADOCK 05000298 F PDR Revised By/Date Reviewed By/Date Approved By/Date Rev. Procedure-C. Morgan 7/22/83 B. Mcdonald 8/2/83  % 4 5.7.17 5 Pages e-v-n f

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B. NRC Regulatory Guide 1.145, August 1979, Atmospheric Dispersion Models For Potential Accident Consequence Assessments At Nuclear Power Plants. i C. NRC Regulatory C' side 1.111, July 1977, Methods For Estimating Atmos-pheric Transport And Dispersion Of Gaseous Effluents In Routine Re-leases From Light-Water-Cooled Reactors.

D. NRC Regulatory Guide 1.109 Revision 1, October 1977, Calculation of Annual Doses To Man From Routine Releases Of Reactor Effluents For The

,, Purpose Of Evaluating Compliance With 10CFR50, Appendix I, Iodine Inhalation Dose Factors.

E. Health Physics Journal, November 1981 Noble Gas Dose Rate Conversion Factors.

F. ICRP 59, Working Breathing Rate.

IV. PREREQUISITES A. A release of airborne radioactive material has occurred or has the potential of occurring.

V. LIMITATIONS A. Release Rate Determinations must be conducted in accordance with EPIP 5.7.16 Release Rate Determination.

VI. PRECAUTIONS A. Actual dose rates will vary as a function of:

1. The total curies released (varies with time).
2. Release rate (varies with time) .
3. The duration o'f the release.

4 The isotopic mixture of the release.

5. Meteorological conditions.

B. Update and refine dose assessments for critical receptor sites upon significant changes in one or more of the above parameters.

C. Should a release occur which necessitates rapid decision making con-cerning the recommendation of protective actions, the guidance con-tained in EPIP 5.7.20 should be followed.

VII. EQUIPMENT A. Technical Support Center (TSC).

1. Texas Instruments T.I. 820 Printer, Hard-Copy Terminal.

PrCcedure Number EPIP 5.7.17 Date ll-N- $2b Revision 4 Page 2 Of 15 Pages

2. Two RACAL-VADIC-VA3451P MODEMS, 300/1200 Baud.
3. RS-232 DATA SPLITTER.
4. Two standard telephones; at least one must have microwave and outside commercial telephone access.
5. Appropriate wiring harnesses for the proper connection of the terminals and modems.
6. Appropriate amounts of continuous Data Form paper for the hard-copy terminal (Printer).

B. Emergency Operations Facility (EOF)

1. Texas Instruments T.I. 820 Printer, Hard-Copy Terminal.
2. One RACAL-VADIC-VA3451P MODEM, 300/1200 Baud.
3. Two standard telephones; at least one must have microwave and outside commercial telephone access.
4. Appropriate wiring harnesses for the proper connection of the terminal and modem.
5. Appropriate amount of continuous Data Form paper for the hard-copy terminal (Printer) .

C. Hand Calculations.

1. Environs Map.
2. Atmospheric Dispersion Overlays.

VII

I. PROCEDURE

A. Computerized Dose Assessment.

1. Physical set up of equipment.
a. Technical Support Center (TSC).
1) The necessary equipment for the operation of the Atmospheric Dispersion Model in the TSC is given in Section VII. The

! T.I. 820 Printer, the two VA-3451P Modems (Marked A and B),

the continuous Data Form paper, and the appropriate wiring harnesses are located in the TSC. Upon arrival in the TSC, make sure the separate pieces of equipment are properly connected to one another in accordance with the configura-tion shown in Attachment "A" of this procedure. Each cable i is numbered to correspond with an identically numbered receptacle (i.e. #1 to #1, #2 to #2, etc.).

l Procedure Number EPIP 5.7.17 Date 13 2[ 25 Revision 4 Page 3 Of 15 Pages

2) It is necessary that the T.l. 820 Printer and the VA-3451P Modems have the proper Terminal Ccnfiguration in order to successfully operate the Atmospheric Dispersion Model.

This configuration shall be set for the faster 1200 Baud Rate. The configuration of the T.I. 820 Printer has been preset and should not require adjustment. If, however, the Printer is not properly configured, the instruction sheet for the necessary corrections is located on a pullout pad under the front lower left of the machine. For the 1200 Baud mode, the configuration number sequence should read 13, 25, 37. The method for obtaining this sequence of numbers is explained on the pullout pad mentioned above.

The nocual positions of the two rocker switches on the left side of the keyboard panel should be forward, in the LINE and VIEW position. The on-off switch is located on the back of the machine next to the 115 AC power cord should be in the ON position.

a) The switch configuration of the VA-3451P MODEMS should be as follows:

1. Front - Three toggle switches located on the left side of the machine are labeled FA; MS; and DA, VO, MA. The FA switch is a one position switch which will always be in the FA position. The HS switch has two positions and should be in the HS position for normal operation with the 1200 Baud Rate. The lower position, which is not labeled, is for use with the 300 Baud Rate, which will not be used under normal circumstances. The DA, VO, MA switch on the Modems should be in the middle or VO posi-tion.
2. Back - There are two horizontal switches on the back of each Modem. The inside switch (nearest the AC power cord) should be in the extreme outside position (away from the AC power cord). The outside switch (nearest the outer edge of the modem) is a three-position switch and should be in the middle position for normal use. The proper configuration and explanation of these two switches is attached to the bottom of each modem.

l b) The lighting configuration on the front panel of the l

VA-3451P Modem is indicative of ((ich mode the VA-3451P Modem happens to be in at the time the light is on.

The key to the lighted panel is as follows:

1. TXD = Transmission of Data from the Printer to the Computer; only lights up when a signal is sent to i

the computer.

l Procedure Number EPlP 5.7.17 _ Date 7 3 aevision 4 Page 4 Of 15 Pages i

2. RXD = Lit when Receiving the Data from the Computer ,

to the Printer.

3. HS = High Speed print rate; 1200 Baud when on/

300 Baud when off.

4. CTS =' Clear To Send; meaning the Modem is ready to work.
5. DSR = Data Set Ready; meaning the Computer is ready to work.
6. DTR = Data Terminal Ready; meaning the Printer is ready to work.
7. RI = Ring Mode; the Modem is ready to make a telephone call when the light is blinking.
8. CXR = Carrier Transmit; signal from the Computer to the Printer is established when lit. This mode will take 2 to 5 seconds after the first high-pitched tone is received. When the CXR light ccmes on the receiver may be hung up.
b. Emergency Operations Facility (EOF).
1) The necessary equipment for operation of the Atmospheric Dispersion Model in the EOF is given in Section VII. This equipment is stored in the CNS Security Building Admini-i stration Office. Each piece of equipment must be moved to i the designated Radiological Assessment area. The equipment must then be properly connected in accordance with the configuration shown in Attachment "A" of this procedure.

Each cable is numbered to correspond with an identically numbered receptacle (i.e. #3 to #8, #9 to #9, etc.).

2) The terminal configuration for the T.I. 820 Printer and the VA-3451P MODEMS is the same as those located in the TSC.

That configuration is noted above.

2. Operating the Emergency Preparedness Atmospheric Dispersion Model -

Interim Version.

a. Upon completion of the physical set up of the T.I. 820 Printer

, and appropriate MODEMS in the TSC and EOF as shown in Attach-ment "A", the following steps must be completed.

1) Plug all modules into a common 115 V AC outlet and turn the (OFF/0N) switch to the ON position on the T.I. 820 Printers.

r The VA-3451P MODEMS will automatically activate when the T.I. 820 is turned on.

Precedure Number EPIP 5.7.17 Date lI-N-2 2) Revision 4 Page 5 Of 15 Pages

J - e s

2) In the TSC one telephone will be used to access the PRIME Computer in the Columbus General Of fice. The primary method of communication with the PRIME is the NPPD Micro-wave Telephone System. The secondary method of communica-tion is a standard com=ercial telephone line. The numbers to be dialed in order to access the PRIME are as follows:

a) Primary Method (Microwave) from CNS is 74-368-5285.

b) Secondary Method (Commercial Telephone Line) from CNS is 9-00-563-5285.

Allow the telephone to ring until a continuous high pitched tone is received. The continuous high pitched tone indi-cates that access to the computer has been accomplished.

At this time, push the three-position toggle switch on the VA-3451P MODEM A from the normal VO position to the DA position. Wait for the CXR indicator light on the front of the Modem to come on (light up) . When the CXR light comes on, the communication link from the Computer to the Printer has been established and the telephone receiver should then be gently hung up.

In a normal operating condition the following lights on the VA-3451P MODEM will be on; HS, CTS, DSR, DTR, and CXR. If one or more of these lights are off, repeat Steps 1) and 2).

The second telephone in the TSC will be used to dial-up the Printer in the EOF. The dial-up number for the EOF is CNS Extension 301. Extension 301 is a direct hook-up to the VA-3451P MODEM located in the EOF. This is an Auto Answer /

Originate Modem which is connected directly to the T.I. 820 Printer in the EOF as shown in Attachment "A". Using a second telephone and VA-3451P MODEM B, the operator in the TSC will dial CNS Extension 301 and listen for the high-pitched tone as mentioned in the previous paragraph. Upon receiving the high-pitched tone, push the three-position toggle switch from the VO position to the DA position and wait for the CXR light to come on. Again the activation of this light indicates communication between the Printer in the TSC has been established with the Printer in the EOF.

At this time the equipment in the TSC is operational and the equipment in the EOF is slaved to the TSC equipment.

If the equipment in the TSC malfunctions, the VA-3451P Modem in the EOF will allow a direct communication link with the PRIME by pushing the switch on the Modem to the VO position and dialing the appropriate microwave number mentioned above. When the computer has been accessed push the switch to the DA position as noted above.

Procedure Number EPIP 5.7.17 Date ) -N'2 dS Revision 4 Page 6 - Of_ . 15 Pages

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During normal working hours contact the Columbus General Office Computer Services Division to clear all other work on the PRIME Computer. Since this program is run on a ti:.e share basis, clearing all other work will speed the calcu-lations and enable the program to increase its efficiency.

Contact one of the following people.

a) Dennis Smith - (402) 563-5233.

b) Cary Linder - (402) 563-5350.

c) John Riggle - (402) 563-5680.

d) Joe Srb - (402) 563-5553.

3) At this time the Hard-Copy Terminals are operational. In order to test the terminals, the operator in the TSC shall type the word HELLO and then depress the return key. If the words LOGIN PLEASE ER! appear on the Hard-Copy Ter-minal, the equipment is functioning properly. If nothing is happening on the Printer, repeat Steps 1) through 3).
4) Upon proper completion of Steps 1) through 3) the following inputs must be entered in order to access the program

, Model. The computer prompt will indicate the order that inputs must be entered. The Computer Prompts and Operator inputs are as follows:

Computer Operator Prempt Inout LOGIN PLEASE ER! LOGIN EPMI PROJECT CODE ( ): CNS OK, R EPM 3 Notice that the operators' inputs sometimes require spaces between command words. For example; a space must be input

between LOGIN and EPMI. .Where shown all blanks are man-

! datory.

The program will now begin execution.

Give the program a Title (e.g Turbine Steamleak),

i I

L Procedure Number EPIP 5.7.17 Date ) ~ !- f b Revision 4 .Page 7 Of 15- Pages

5) The program will prompt each input that is necessary to properly execute the Model. Attachment "B" of this proce-dure contains certain site specific data asked for by the program. This data will be necessary for operator input to successfully complete the Model. With the exception of the Flow Velocity Data, all site parameters will be used as primary information for input to the program. Actual Flow Velocity Data may be obtained from the appropriate meters and charts in the Control Room and the information concern-ing the Flow Data Velocity in Attachment "B" will be used as secondary or Lackup data. This data is based on design flows and may NOT show the actual Flow Velocity. There is a halt after each prompt to allow the operator to input the necessary data. If the plume passes over special receptor or preselected sample points, the operator will be alerted.

The operator should refer to Attachment "C" which identi-fies the map (s) referencing the corresponding locations.

NOTE: If at any time during the program the telephone link should become disconnected and the program ceases operation, take the following action. Re-dial the PRIME Cocputer and the Program will pick up where it left off when it was disconnected.

NOTE: In the event the terminals located in the TSC should malfunction or the TSC should be evacuated the TSC operator should NOT Log Out of the program. When the program reaches an appropriate stopping point such as the end of a 15 minute segment the operator will disconnect (hang up) the terminal from the PRIME Computer. This can be done by pushing the three-position toggle switches on both MODEM A and MODEM B to the VO position. At this time the EOF should be notified of the termination of TSC opera-tion of the Dispersion Model. The operator in the EOF can then dial up the PRIME Computer as stated in Step 2) above and continue the uninterrupted sequence

.of 15-minute segments. The EOF then becomes the primary control center for operation of the Atmos-pheric Dispersion Model.

If the operator wishes to terminate the program, a prompt of 999 will occasionally appear. At this time, the oper-ator must type 999. Af ter typing 999, and thereby termi-t nating the program, the following computer prompts - will appear and the appropriate operator inputs must be entered.

Computer Operator Prompt Input STOP OK, LO t

i Prs:edure Number EPIP 5.7.17 Date 57-N 2$2b Revision 4 Page ~8 Of 15 Pages

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6) The program has been Logged Out. The operator may either dis:ontinue operations or initiate a new run. If a new run is desired, repeat Step 4) above. If the operator wishes to discontinue the operation of the program, push the three-position toggle switch from the DA position to the VO position.

B. Hand Calculated Dose Assessment.

1. The Emergency Director is responsible for the implementation of this procedure.
2. Initiate EPIP 5.7.16. Release Rate Determination, and obtain the release rate in (Ci/Sec) for:
a. Noble Gases; record on Attachment "F", Section A., Column 3.
b. Total Iodines; record on Attachment "F", Section B., Column 3. l l
c. Recalculate Release Fbtes as a function of effective age and enter-in the appropriate columns.
3. Determine the atmospheric stabilit;* category.
a. Using differential temperature recorder determine atmospheric stability category. Visual aid on face of recorder will determine stability. Following step explains stability classi-fication.
1) Obtain the temperature difference in C* between 97m and 10m, if not available obtain the C' between 47m and 10m, if not available obtain the temperature difference between 97m and 47m (read frca the upper level to the lower level) .

Utilizing the appropriate value, stability categories are defined as follows:

Pasquill Delta Temp. Delta Temp. Delta Te=p.

Categorv 'C (97m-10m) 'C (47m-10m) *C (97m-47m)

A -1.6 -0.70 -0.95 B -1.6 to -1.5 -0.70 to -0.63 -0.95 to -0.85 C -1.5 to -1.3 -0.63 to -0.55 -0.85 to -0.75 D -1.3 to -0.43 -0.55 to -0.18 -0.75 to -0.25 E -0.43 to 1.3 -0.18 to 0.55 -0.25 to 0.75

-F 1.3 to 3.5 0.55 to 1.48 0.75 to 2.0 G 3.5 1.48 2.0

b. Stability Category determines utilizing meteorological data is also discussed in Attachment "D".
4. Overlays.

Date )[--h-k 3 Revision 4 Paoe =9 Of 15 Pages Procedure Number _EPIP 5.7.17

2

a. If 2, 5, and 10 mile plume centerline doses are to be deter- l mined, calculate the plume centerline X/Q using Attach =ent "L",

2, 5. And 10 Mile Plume Centerline Deternination. Complete these calculations and proceed to Step 6. of this procedure.

1) If the release is from the ERP, use Attachment "L", Page 1.
2) If the release is not from the ERP, use Attachment "L",

Page 2.

b. If it is necessary to identify key receptor sites and compute doses for these sites, select the proper atmospheric dispersion overlay. Overlays are labeled according to the atmospheric stability class,
c. Situate the overlay upon the base map. Utilizing the wind direction in compass headings at the 97m height as previously determined, rotate the overlay until the plume centerline is oriented in the direction of the compass heading (compass headings are provided for a full 360* azimuth about the site),
d. Once the dispersion overlay is placed upon the base map, it ic clear which receptor locations may be in the path of the dispersing plume. List key receptor site locations in Attach-ment "E", Column 2.
5. Determine X/Q values for key receptor sites.

ms

a. Values on the overlay are ,
b. Each receptor site will have a different X10u/Q value.
1) X10u/Q values on the overlay are shown as isoplech lines printed directly upon the overlay. Each isopleth line is labeled with a capital letter to indicate its relative strength. The numerical value corresponding to the letter is shown in the far, lower right corner of the overlay.

Plume centerline values are marked by plus marks (+)

directly along the centerline. Each plus mark corresponds to the downwind distance labeling the vertical edges of the figure. The X10u/Q associated with each centerline dis-tance is indicated in the lower right corner of the over-lay, directly to the left of the X10u/Q value associated with the isopleth lines (capital letter values). Utilizing

, these values, it is possible to interpolate X10u/Q values l for any area bounded by the outermost isopleth of each overlay. Record the X10u/Q value for each receptor site in l Attachment "E", Column 3.

(

2) Estimate the X10u/Q value for each of the receptor site locations. It may be necessary to interpolate between isopleths. Enter this value in Attachment "E", Column 3.

l Prosedure Number EPIP 5.7.17 Date - ~fb Revision 4 Page 10 Of 15 Pages l

3) Obtain the windspeed in m/s at the 97m height. Enter this value in Attachment "E", Columa 4 Note:

= Meters /Sec (M/S).

4) Multip}y Column 3 by Column 4 yielding the resultant X/Q (Sec/m ) value for that receptor site and record in Column 5.

In equation form the calculatien may be represented as:

Om/s/Q X/Q (Sec/m ) = Windspeed (m/s) At 97m Note: Dose Calculations will be performed on Attachment "F". A separate Attachment "F" should be used for each key receptor site (refer to Attachment "J" for dose equations and parameter descriptions).

6. Calculate the whole body gamma dose rates and d,ose commitment from noble gases for each key receptor site using (Attachment "F",

Section A.).

a. Obtain the receptor site X/Q value determined in Step 4. or 5.

(above) and enter in Sections A. and B., Column 2.

b. Determine the gamma decay Energy E as a function of effective age of the noble gas at the receptor site utilizing Attachment "G". Average gamma decay energy for noble gases as a function of effective age. Enter this value in Section A., Column 4.
1) For most cases the effective age of the noble gas at the receptor site may be equal to the effective ajgt at the time of the release onset.
2) If the transit time from the release point to the receptor site is greater than I hour the transit time component l

should be considered. This will result in a more realistic dose estimate. Refer to Attachment "H" for effective age determinations at receptor site involving consideration of l transit times.

c. Enter the anticipated or actual time of exposure in Column 7.
d. Complete math computations in Section A.
7. Calculate the thyroid inhalation dose rates and integrated doses from total iodines using Attachment "F", Section B.

j

a. Obtain the total iodine dose rate commitment factor as a function of effective age using Attachment "I", Total. Iodine Dose Commitment Factors. Enter this value in Section B.,

Column 4.

' Procedure Number EPIP 5.7.17 'Date l7-k hb) Revision 4 Page 11 Of 15 Panes

Note: Attachment "I" is a log-log scale with units of 1.0 E+8 through 1.0 E+9 or the y-axis.

For effecti3e ages greater than 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> use a value of 1.86 E+09 mrem-m /llr-C1.

b. Enter the acticipated or actual time of exposure in Column 6.
c. Complete the math computations 17 Section B.
8. Update and refine the dose assessments for critical receptor sites upon significant changes in releases, meteorological conditions, or effective ages (whole body gamma MeV/ dis and thyroid total iodine conversion factors).
a. Sum the previous exposures using Attachment "F", Sections A.

and B.

C. Initial Dose Assessment For On-Shif t Personnel.

1. This method of dose assessment may be used by on-shif t personnel to establish an initial dose assessment of off-site releases. This method may serve as an initial assessment until the on-shift crew is augmented by emergency response personnel and further dose assessment evaluations can be accomplished.
2. EPlP 5.7.16, Release Rate Determination, must have been completed.

Identify the release point and refer to the appropriate Attachment in EPIP 5.7.16.

a. Attachment "A", Elevated Release Point Using Effluent Monitor Release Rate Determination.
b. Attachment "B", Turbine Building Release Rate Determination.
c. Attachment "C", Augmented Radioactive Waste Release Rate Determination.
d. Attachment "D", Elevated Release Point Primary Containment Monitor Release Rate Determination.

Record the noble gas and total iodine released from EPIP 5.7.16, Release Rate Determination, onto Attachment "J", On-Shif t initial

, Dose Assessment, of this procedure.

3. Sum the noble gas and total iodines being released and record on Attachment "J".
4. Because the data presented in the tables of Attachment "J" are per 100 Ci/Sec release, divide the total release above by 100 to l determine the multiplication factor and record on Attachment "J",

On-Shift Initial Dose Assessment.

l t-l

. Procedure Number EPIP 5.7.17- Date )?- N" S3$ Revision 4 Page 12 Of' 15 Pages

5. Determine atmospheric stability class (see Page 9 Step B.3. of this procedure). Using differential temperature recorder determine atmosphrric stability category. Visual aid on face of the recorder will determine stability. Record on Attachment "J", On-Shift Initial Dose Assessment, Item 2.
6. Determine wind speed from the wind speed record for the tcp of the ERP and record the mph on Attachment "J", On-Shift Initial Dose l Assessment. Item 2. l 1
7. Using the atmospheric stability class as a guide, choose one of the three tables that most closely compares with that stability class.

1

8. Using the wind speed an exposure rate at any distance up to 50 miles may be approximated.
9. Normally the exposure rates to the nearest downwind residence, population center, or area will be determined.

Note: The thyroid exposure is based on adult uptake to determine the child thyroid dose rate; double the adult dose rate.

Record the exposure rates at the chosen receptor site on Attachment ugn,

10. Multiply the exposure rates times the multiplication factor from Step 4. to correct the exposure rates to the actual release and record on Attachment "J".
11. By integrating the exposure rate over a period of time (anticipated or actual duration of the release) the total dose can be deter-mined. Record the rate and time on Attachment "J" and detetuine the total dose.
12. Compare the total integrated dose to Protective Action Guides in EPIP 5.7.20, Protective Action Guides.

Note: EPIP 5.7.20, Protective Action Guides, Attachment "E",

contains a similar set of tables that estimates the number of hours before a protective action guide is exceeded for this same release.

I

13. Inform the Emergency Director of the exposure rate, integrated dose, and protective guide comparison. It is the Emergency Direc- '

tor's decision to recommend a protective action.

D. Correlating Dose Assessment Determination With Off-Site Sampling Data. '

l.- Dose assessment determinations are based upon -projected airborne radionuclide concentrations. By correlating projected airborne radionuclide concentrations with actual airborne radionuclide concentrations a dose assessment correction factor may be derived.

This correction factor will be derived using actual and projected I-131 airborne concentrations 7 Procedure Number- EPIP 5.7.17 Date-)! 1hk3 Revision' 4 Pane 13 Of 15 Panes

a. Actual noble gas, particulate, and iodine off-site air concen-trations will be determined by collecting off-site air samples (refer to EPIP 5.7.18) and analyzing these samples in the Radiochemistry Laboratory (refer to Chemistry Procedure 8.4.1.2 for sample analysis details). Generally, the most accurate results are obtained for I-131.
2. Record the projected I-131 release rate at the time of off-site sample collection f rom EPIP 5.7.16. Release Rate Determination.

Attachment "I", onto Attachment "K", Dose Assessment Correction Factor Determination, Column 3, of this procedure.

3. Record the X/Q value for the sample collection location at the time of collection from Section A., Computer Dose Calculation, or Section B., Hand Calculation, Attachment "F", of this procedure on Attachment "K", Column 4.
4. Multiply the projectgd I-131 release rate (Ct/Sec), Column 3, by the X/Q value (Sec/m ), Colupn 4, to obtain the projected I-131 airborne concentration (Ci/m or pCi/cc), Column 5. Enter this value in Column 7.

3

5. Obtain the actual I-131 air concentration (Ci/m or uCi/cc) from the Radiochemistry Laboratory and record this value on Attachment "K", Column 6.

3

6. Divide the actual I-131 air concentratign (Ci/m or uci/cc) by the projected I-131 air concentration (Ci/m or uCi/cc) to obtain the dosc assessment correction factor, Column S.
7. The Radiological Manager / Coordinator shall determine if the correc-tion factor is applicable to all receptor sites or limited to specific receptor sites.
a. For designated sites multiply the previously determined dose calculation by the correction factor,
b. For designated sites incorporate che correction factor into future dose calculations.

, IX. ATTACHMENTS A. Attachment "A", Terminal Hook-Up Configuration At CNS Technical Support Center, Emergency Operations Facility, And Columbus General Office Flow Diagram.

B. Attachment "B", EPM 2 Atmospheric Dispersion Model - Interim Version Input Information.

C. Attachment "C", Maps List.

D. Attachment "D", Stability Category Determination (Utilizing Data Obtained From Meteorological Tower).

Pr;;cdure Number EPIP 5.7.17 Date lf ~)$ b Revision 4 Page 14 Of 15 Pages

E. Attachment "E", Key Receptor Site And X/Q Determination.

F. Attachment "F", Dose Rates And Integrated Dose For Whole Body And Thyroid Calculation.

G. Attachment "G", Noble Gas Mixture Average Gamma Decay Energy.

H. Attachment "H", Transit Times And Effective Ages Of Noble Gases At Receptor Sites Of Interest Determination.

I. Attachment "I", Total Iodine Dose Commitment Factors Vs. Effective Age.

J. Attachment "J", On-Shif t Initial Dose Assessment.

K. Attachment "K", Dose Assessment Correction Factor Determination.

L. Attachment "L", 2, 5. And 10 Mile Plume Centerline X/Q Determination.

EPIP 5.7.17 Date "I -2 b 4 Pane 15 Of 15 Pages

-Procedure Number Revision' l

B 8

l 9 h, COLUMBUS GENERAL OFFICE COOPER NUCLEAR STATION g TECHNICAL SUPPORT CENTER EMERGENCY OPERATIONS I FACILITY l

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COOPER NUCLEAR STATION OPERATIONS MANUAL XITACl2 TENT "B" EMERCENCY PLAN IMPLEMENTINC PROCEDURE 5.7.17 DOSE ASSESSMENT EPM 2 ATTIOSPilERIC DISPERSION H0 DEL - INTEHIH VERSION INPtfr INFORMATION T-C BUIISING AUCHENTED ELEVATED REACTOR FAN EX11AUST RADWASTE RADWASTE RELEASE PARAMETER BUILDING BUILDING BUI!b1NC BUILDING POINT Number Of Ducts 1 1 DUAL SINGLE 1 1 Duct Coordinatea 75'W, 492'N 100'E, 396'N 267'W, 583'N 230'W, 583'N 342'W, 525'N 0, 0 (From ERP)

Hodel Coordinate Input -75, 492 100, 396 -267, 583 -230, 583 -342, 525 0, O Effluent Release fielght (Heters Above Grade) 49.1 10.1 16.5 16.5 13.5 99.4 lleight Of Tallest Adjacent Building (Heters Above Crade) 44.5 44.5 44.5 44.5 44.5 44.5 Flow Velocity (e)

(Heters/Second) 11.66 8.05(a) 6.45 8.16 15.67 14.42(b) 8.56(c) 22.98(d)

Flow Rate (cfm) 73405 50710(a) 40570 10030 16500 3000(b) 1780(c) 4780(d)

Release Vent (Heters) 1.95 1.95(a) 1.95 0.86 0.80 0.35 Diameter (Feet) 6.38 6.38(a) 6.38 2.82 2.61 1.16 Exhaust Winter 70 70 70 70 70 60 Temp (*F) Summer 90 90 90 90 90 90 St ructure Rx Bldg 1049' TCB 1010' Bldg 952' Bldg 952' Bldg 941' 1228' Elevation (Feet FEL) Ex Fan 1064' Fan Bldg 933' Ex Fan 957' Ex Fan 957' Ex Fan 941' Crade Level (Feet HSL) 903' 903' 903' 903' 903' 403' (a) Data given for Turbine-Generator exhaust fans is f or one operating fan. ibltiply data by total nun.ber of f ans in operation. There are a total of four (4) fans. Typically three fans are in continuous operation with one standby.

(b) Elevated Release Point Dilution Fan Only.

(c) Standby Cas Treatment Fans Only.

(d) Elevated Release Point Dilution Fan and Standby Cas Treatment System Fons. This is the i.ormal operating situation when the Standt.y Cas Treatment System la in operation.

(e) Design basis only - These numbers are to be used as backup informatien nnly. When possible use actual meter or chart readings.

Procedure Number EPil 5.7.17 Date b _ _ _

Revision 4 Pege i et i Pares

COOPER NUCLEAR STATION OPERATIONS MANUAL TTTACHMENT "C" EMERGENCY PLAN TMPLDiENTING PROCEDURE 5.7.17 DOSE ASSESSMENT MAPS LIST

1. Atmospheric Dispersion Model (EPM 2) Special Receptor Points, NPPD Drawing CNS-MI-102, 10 Mile Radius.
2. Preselected Radiological Sampling And Monitoring Points In The Vicinity Of Cooper Nuclear Station, NPPD Drawing CNS-MI-03,10 Mile Radius.
3. Cooper Nuclear Station Site And Property Boundary, NPPD Drawing 2.2 (P3-A-45) Revision 1, 1 Mile Radius.
4. Cooper Nuclear Station 50 Mile Emergency Planning Zone, Revision 2, 50 Mile Radius.

4 Procedure Number EPIP 5.7.17 Date 3 3d Revision. 4 Pane 1 Of- 1 Pages

COOPER NUCLEAR STATION OPERATIONS MANUAL ATTACHMENT "D" EMERCENCY PLAN IMPl.EMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT STABILITY CATEGORY DETERMINATION (UTILIZING DATA OBTAINED FROM METEOROLOGICAL TOWER)

Methods Area Listed In Order Of Preference

1. Obtain the temperature difference in C' between 100m and 10m, if not available obtain the Delta C* between 100m and 60m, if not available obtain the delta C' between 60m and 10m. Utilizing the appropriate value, stability categories are defined as follows:

Delta Temp Delta Temp

A -1.7 -0.76 0.95 B -1.7 to -1.5 -0.76 to -0.68 -0.95 to -0.85 C -1.5 to -1.3 -0.68 to -0.60 -0.85 to -0.75 D -1,3 to -0.45 -0.60 to -0.20 -0.75 to -0.25 E -0.45 to 1.3 -0.20 to 0.52 -0.25 to 0.75 F 1.3 to 3.6 0.52 to 1.6 0.75 to 2.0 G 3.6 1.6 2.0 Procedure Number EPIP 5.7.17 Date 2-4l-l$bb Revision 4 Page 1 Of 3 Pages

COOPER NUCLEAR STATION OPERATTONS MANUAL ATTACHMENT "D" EMERCENCY PLAN LMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT STABILITY CATECORY DETERMINATION

2. Obtain sigma at 100 meters for windspeeds above the threshold value. If not available obtain sigma ac 10 meters. Utilizing the appropriate value, stability categories are defined as follows:

Stability Stad Deviation Stud Deviation Send Deviation Category At 100m At 60m At 10m A 25 B 20 C 15 D 10 E 5 F 2.5 G 1.7

3. If none of the above data is available from the new meterological tower, utilize data from the ERP tower.
4. If data is not available from either meterological tower utilize data obtained through visual observation.

l 1

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COOPER NUCLEAR STATION OPERAT102S MANUAL ATTACHMENT "D" EMERCENCY PLAN IMPLD1ENTING PROCEDURE 5.7.17 DOSE ASSESSMENT STABILITY CATEGORY DETERMINATION KEY TO STABILITY CATECORIES Surface Wind: Day: Night:

Incoming Solar Radiation Thinly Overcast -

Speed Greater Less (At 33') Than 1/2 Than 3/8 (m/Sec) Strong Moderate Slight Cloud Cloud 2 A A-B B 2-3 A-B B C E F 3-5 B B-C C D E 5-6 C C-D D D D 6 C D D D D Note: The neutral class, D, should be assumed for overcast conditions during day or niSht. <

- Sampling time of 10 minutes.

- Night refers to the period from I hour before sunset to I hour af ter sunrise.

- Class D may be assumed for overcast condition during day or night, regardless of wind speed.

- Strong incoming solar radiation; solar altitude greater than 60* with clear skies.

- Slight incoming solar radiation; solar altitude from 15* to 35* with cicar skies.

Procedure Number EPTP 5.7.17 nae. Y d - 7.D. navi.<nn t. paea 3 of 3 Pace.

- i

COOPER NUCLEAR STATION OPERATIONS MANUAL -

ATTACliMENT "E" EMERCENCY PLAN IMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT 1

I KEY RECEPTOR SITE AND X/Q DETERMINATION K

Effective Windspeed Age Receptor X10u/Q At 97m X/Q (Hr) Site (m/s) (m/s) (Sec/m )

x (10/ m/s) =

x (10/ m/s) =

x (10/ m/s) =

1

x (10/ m/s) = -

x (10/ m/s) =

i x (10/ m/s) =

x (10/ m/s) =

l x (10/ m/s) =

I x (10/ m/s) =

x (10/ m/s) -

! x (10/ m/s) =

i x (10/ m/s) =

x (10/ m/s) -

i x (10/ m/s) =

x (10/ m/s) =

x (10/ m/s) =

x (10/ m/s) =

x (10/ m/s) =

x (10/ m/s) =

x (10/ m/s) -

Note: - Meters /Sec.

Procedure Number __EPIP 5.7.17 Date 3 -N_ Revision 4 Page 1 Of 1 Pages

COOPER NUCLEAR STATI0ii OPERATIONS MANUAL ATTACHMENT "F" EMERCENCY PLAN IMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT DOSE RATES AND INTEGRATED DOSE FOR WHOLE BODY AND THYROID CALCULATION Raceptor Site Location: Name:

Section A.

Whole Body Dose Rate And Integrated Doses From Noble Cases As A Function Of Effective Age

, Release Effective Rate

  • Cony Fa3 Dose Rate Exposure j Age X/Q RR E* mR-dis-m Dng Time Dose *

(Hr) (Sec/m ) (Ci/SEb) (MeV/ dis) MeV-Di-Hr (mrem /Hr) (Hr) (mrem)

(1) (2) (3) (4) (5) (6) -(7) (8)

, x x x 9.5ES = x =

x x x 9.5E5 = x =

x x x 9.5E5 = x =

1 x x x 9.5E5 = x =

x x x 9.5E5 = x =

x x x 9.5E5 = x =

x x x 9.5E5 = x =

x x x 9.5E5 = x =

Sum =

Section B.

Thyroid Inhalation Dose Rates And Integrated Doses 4

l Total i Iodine

  • Release TI Cony Adult Adult Child Effective Rate Factorj Dose Rate Exposure Dose Dose

, Age Q/X RR (TI) mrem-m TI Time Cocmit Cc=mit l (Hr) (Sec/m ) (Ci/Sec) Hr-C (crem/Hr) (Hr) (= rem) (mrem)

(1) (2) (3) (4)y (5) (6) (7) (' )

x x = x = x2=

x x = x = x2=

x x = x = x2=

l x x " x = x2= _

x x " x = x2=

x x = x = x2=

x x = x = x2=

l x x = x = x2=

Sum = Sum =

i

. CUpdate dose assessments upon significant changes in releases, meteorological conditions (X/Q) or ef fective ages (whole body MeV/ dis or thyroid total iodine conversion factors).

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1. Release Rates (From EPIP 5.7.16. Release Rate Determination):

Release Rate Noble Gases: Ci/Sec Release Rate Total Iodines: Ci/Sec Total Release (Sum Of Noble Gases And Total Iodines): Ci/Sec " Multiplication Factor 100 1/Se - i

2. Meteorological Data:

Stability Factor: Wind Speed MPH:

3. Using the above stability factor choose one of the three following tables that most closely represents that stability factor.

l Expecure Rate mRcm/llr From 100 Ci/Sec Release Race STABILITY CLASS A OR B WIND DISTANCE DOWN WIND VELOCITY EXPOSURE OF CNS MILES MPH MODE 1.5 2.5 3.5 5 10 20 35 50 22.5 Thyroid 53 22 16 12 7 4 2 --- External 5 2 2 1 --- --- --- --- 10 Thyroid 122 49 38 27 15 3 --- --- External 12 5 4 2.5 1 --- --- --- 5 Thyroid 250 100 75 55 20 7 --- --- I External 22 9 7 5 2 --- --- --- Proc: dure Number EPIP 5.7.17 Date lf-N -')$23 Revision 4, Page 1 Of 2 Pages . . LUUrEn EULLinM banalUh UPLKM61UNb P1AhudL IACHMENT "J". . .4ERCENCY PLAN IMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT 3 ON-SHIFT INITIAL DOSE ASSESSMENT STABILITY CLASS C OR D WIND DISTANCE DOWN WIND VELOCITY EXPOSURE. OF CNS MILES MPH MODE 1.5 2.5 3.5 5 10 20 35 50 22.5 Thyroid 278 227 160 120 50 21 10 --- External 27 22 16 11 5 2 1 --- 4 10 Thyroid 625 556 385 263 111 12 --- --- External 63 50 37 23 9 1 --- --- 5 Thyroid 1250 1000 833 556 227 32 --- - -- External 125 91 67 43 15 2 --- --- i STABILITY CLASS E OR F 1 WIND DISTANCE DOWN WIND VELOCITY EXPOSURE OF CNS MILES

MPH MODE 1.5 2.5 3.5 5 10 20 35 50 7

22.5 Thyroid --- 20 47 79 94 70 47 ---

External ---

2 5 8 9 6 4 --- 10 Thyroid --- 46 110 185 217 28 --- --- External --- 4 10 16 17 2 --- --- 5 Thyroid 6 93 227 357 417 69 --- --- External --- 8 19 29 29 3 --- --- 4 i 4. Using wind speed and distance, determine exposure rates: Distance: Miles ! Exposure Rate x Multiplication Factor = Exposure Rate (From Step 1.) (mren/Hr) l. I External: x = i Thyroid: x =

5. Integrate the exposure rate from the above, over the anticipated or actual time of the release to determine integrated dose:

l ! Exposure Rate x Time = Integrated Dose mrem /Hr Thyroid x Hours = mrem Thyroid f 1 mrem /Hr External x mrem External Hours = I Note: Derived thyroid dose from above is for an adult. Child thyroid dose is double. , j that of the adult. l Procedure Number EPIP 5.7.17 Date l 'Y" $2$ Revision 'Page 2 Of 2 Pages ~. . _ - _ _ . . _ . _ _ -~ - . _ - - _ _- . - . - . _ - . . _ . , - , ._ ._ .-- --. _. ._ _ _- . tvurr.n nuu r.nn .u ,u t ua ur e.nn a iv. a ru i.om. ITACHMENT "K"

_MERCENCY PLAN IMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT DOSE ASSESSMENT CORRECTION FACTOR DETERMINATION Proj ecte d Projected Actual Effective I-131 Sample I-131 1-131 Proj ect ed Dose Sample Age At Release Site Airborne Airborne Airborne Assessment Site Sampling Rate Conc Cone Conc Correction X/QVa}ue Location Time (Ci/Sec) (Sec/m ) (Ci/m ) (Ci/m ) (C1/m ) Factor (1) (2) (3) (4) (5) (6) (7) (8) x = 4 =

i I X = " t, X = " X = h = x = 4 = X = 4 = x = 4 = X = 4 = X = I _= X = 4 = X = h a X = $ = X = & = X = h = X = I = X = i = t 4 = X = 4 = X = I = X = E = 1 Prtesdure Number EPIP 5.7.17 Date 3- N 3 Revision 4 Page 1 Of 1 Pages COOPER NUCLEAH STATION OPERATIONS MATUAL ATTACHMENT "L" EMERGENCY PLAN IMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT 2, 5. AND 10 MILE PLUME CENTERLINE X/Q DETERMINATION GROUND LEVEL RELEASE

1. Obtain the windspeed in m/s at the 97m height.

Note: = (m/s) , 3 2. Sector the appropriate stability category below and enter the 97m height i vindspeed in the column. 1

3. Complete the math computations.

Plume Centerline Windspeed Stability Distance At 10m X/Q Category (Miles) X 10u/Q (m/s) (Sec/m ) 2 6.38E-09 x (10/ m/s) = 4 A 5 2.93E-09 x (10/ m/s) = 10 1.61E-09 x (10/ m/s) = 2 9.01E-08 x (10/ m/s) = B 5 3.71E-09 x (10/ m/s) = 10 2.07E-09 x (10/ m/s) = 2 6.04E-07 x (10/ m/s) = C 5 1.37E-07 x (10/ m/s) = 10 4.52E-08 x (10/ m/s) = 2 1.38E-06 x (10/ m/s) = D 5 5.11E-07 x (10/ m/s) = 10 2.14E-07 x (10/ m/s) = 2 3.01E-06 x (10/ m/s) = 1.18E-06 E 5 x (10/ m/s) = 10 5.69E-07 x (10/ m/s) = i l

6.04E-06 2 x (10/ m/s) =

F 5 2.08E-06 x (10/ m/s) = 10 1.06E-06 x (10/ m/s) = 2 1.36E-05 x (10/ m/s) = G 5 4.44E-06 x (10/ m/s) = 10 2.04E-06 x (10/ m/s) = Pr:cedure Number- EPIP 5.7.17 Date 37 l/-" $?$ Reviainn 4 pne. 1 of 2 Pace = GOU1'tK itUGi TAM STAT 10iB OPERATIONS MAf.UAL ATTACHMENT "L" EMERGENCY PLAN YMPLEMENTING PROCEDURE 5.7.17 DOSE ASSESSMENT 2, 5. AND 10 MILU PLUME CENTERLINE X/Q DETERMINATION GROUND LEVEL RELEASE

1. Obtain the windspeed in m/s at the 10m height.

Note: 2 = (m/s)

2. Sector the appropriate stability category below and enter the 10m height windspeed in the column.
3. Complete the math computations.

Plume Centerline Windspeed Stability Distar.ce At 10m X/Q

Category (Miles) X.u/Q (m/s) (Sec/m )

2 5.53E-08 x (1/ m/s) = A 5 2.54E-08 x (1/ m/s) = 10 1.40E-08 x (1/ m/s) = 2 7.83E-07 x (1/ m/s) = l B 5 3.21E-08 x (1/ m/s) = 10 1.80E-08 x (1/ m/s) = I 2 5.81E-06 x (1/ m/s) = C 5 1.21E-06 x (1/ m/s) = 10 3.95E-06 x (1/ m/s) = C 2 2.15E-05 x (1/ m/s) = D 5 5.49E-06 x (1/ /s) = , 10 2.05E-06 x (1/ m/s) = 2 4.35E-05 x (1/__ m/s) = E 5 1.24E-05 x (1/ m/s) = 10 5.06E-06 x (1/ m/s) = 2 1.00E-04 x (1/ m/s) = F 5 3.13E-05 x (1/ .m/s) = 10 1.37E-05 x (1/ m/s) = 2 2.28E-04 x (1/ m/s) = G S 7.38E-05 x (1/ m/s) = J 10 3.33E-05 x (1/ m/s) = Procodure Number EPIP 5.7.17 Date b h " Revision 4 Page- 2 Of 2 Pages 7- < r GENF G AL OFFICE 'N

  • g a P O SON G1 COLU'.; BUS NF ci1A5< A Cb314493 Neuraska Pugh*c gower Disa*:ct

, . i ctc~c~w um n, s_ = = . - - - = = - _ - _ - _ _ - ._- =- =--  ;--n =- - - - - - - - - - - - - - - - - - - . - - - - - - - - - LQAS300186 August 9, 1983 Mr. John T. Collins Regional Administrator U.S. !!uclear Regulatory Commission Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011

Subject:

Emergency Plan Implementing Preceduras Ceeper I;uclear Station

RC 0 cket ;o. 50-298, DPR-46

Dear Mr. Collins:

Pursuant to the requirements of 10 CFR Appendiz E,Section V, " Implementing Procedures," :;chraska Public Power District is submitting one copy of Revision '. of EPIP 5.7.17 " Dose Assessment".

If you have ar., qu-estions regarding this revis _ n, please contact my office.

Sincerel'f, N Of

, 4 le p w, .

V J

Jay ':. Pilan:

Technical 5:aff :Snager I;uclear Powar Grcup

/cmk Enclosure cc: Docu ent Centrol Desk w/2 copies U.S. *uclear Regulatory Commission Washington, DC 20555 i

f 005 ll ~).,

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