ML20031E752

Public Version of Revision 1 to Emergency Plan Implementation Procedure A.2-406, Offsite Dose Projections

ML20031E752
Person / Time
Site:	Monticello
Issue date:	04/29/1981
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML113190720	List: ML20031E750 ML20031E752
References
A.2-406-01, A.2-406-1, NUDOCS 8110160384
Download: ML20031E752 (23)

Text

A2~ Emergency-PlanImpkementingProcedures,

, List of Current Procedures Procedure Procedure Title' Revision Number 000 Series Organization

.,S

).

A.2-001 Emergency Organization 0

100 Series Activation A.2-101 Classification of Emergencies-0 A.2-102 Notification of an Unusual Event 0

A.2-103 Alert-0 A.2-104 Site Area Emergency 0

A.2-105 General Emergency 0

A.2-106 Activation of Technical Support Center 0

A.2-107 Activation of Operations Support Center 0

200 Series

-Assessment A.2-201 Onsite bbnitoring During an Emergency 0-A.2-202 Offsite hbnitoring During and Emergency 0-A.2-203 Svacuation Criteria for Onsite Personnel 0

A.2-204 Offsite Protective Action Recommendations 0

A.2-205 Personnel Accountability-Control Room /TSC 0

A.2-206 Personnel Accountability-Assembly Points 0

300 Series-Protective Actions A.2-301 Emergency Evacuation 0

A.2-302 Assembly Point Activation

0 A.2-303 Search and Rescue 0

A.2-304 Thyroid Prophylaxis 0

400 Series Radiological Surveillance and Control

~

A.2-401 Emergency Exposure Control

.O A.2-402 Contamination Control 0

%)

A.2-403 Emergency Surveys 0

l A.2-404.

Emergency Sampling and Analysis

-0 A.2-405 Release Rate Detemination-0 A.2-406 Offsite Dose Projection 1-A.2-407 Personnel and Vehicle >bnitoring 0=

1 A.2-408 Sample Coordination During an Emergency.

0 500 Scricls Communications and Documentation A.2-501 Comunication During an Emergency 0

A.2-502 Recordkeeping During an Emergency 0

A.2-503 Emergency Reports and wcumentation-0 600 Series Re-Entry and Recovery i

A.2-601 Re-entry.

O A.2-602 Transition to Recovery Plan -

0 700 Series A.2-702 Response-to an Emergency at Prtirie Island 0

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{L) 811olgas4ettoo?T DR A K o9too i

Revision i Page 1 of 23 Op. Com. Rev. Req'd.

Yes X No Q.A. Review Reg'd.

Yes No X ALARA Review Req'd.

Yes No X OFF-SITE DOSE PROJECTION A.2-406 REVIEW AND APPROVA, t

Prepared by-n N

AI. ARA Review: Revision 0 Date 3/29/81 Reviewed b

.b Q.A. Review:

Revision 0' Date 3/29/81 Operations Committee Final Review: Meeting Numb r 968 Date [ h 8/ -

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Date 29 Approved by:

Op. Com. Results Review: Not Required Mtg.# h Date 3/26/81 PURPOSE The purpose of this procedure is to provide guidance and instructions for estimat-ing off-site doses resulting from an unplanned and/or abnotaal airborne release of radioactive material. The main body of this procedure identifies criteria and.

guidelines for dose projection, such as when it is required, how of ten it should be performed, and which dose projection method to use. The attachments to this procedure provide instructions for performing dose projection using the various methods.

7 Alternate methods are provided to cover possible contingencies such

t as offscale monitors, inoperative instrumentation, etc.

y CONDITIONS AND PREREQUISITES A.

An emergency condition has been declared at Monticello Nuclear. Generating Plant as provided in the Emergency Plan.

B.

An airborne release of radioactive materials in excess of environmental

-technical specifications has occurred, is suspected to have occurred, or is: imminent.

PRECAU rIONS -

Precautions are verified in the text of the applicable attachment (s).

RESPONSIBLE INDIVIDUAL Radiation Protection Specialist DISCUSSION A.

General" Applicability The region surrounding the plant site is divided into sixteen 22 1/2-degree sectors. The regions of interest extend from the effluent release points out to fifty miles in each sector.

Contained within the regions of interest Q-are,three special locations of interest. The special locations are the site ng 3

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Procedure A.2-406 Revision 1 Page 2 of 23 boundary, the nearest receptor and the Low Population Z(

' outer c.

boundary. The site boundary and the nearest receptor lo u

+-

iffer for each sector. The L.P.Z. outer boundary locations coincide with the one mile distance from the olant.

B.

Jose Projection t!ethods This procedure provides 3 different calculational methods for performing dose projections. The method (s) used will depend on the availability of release and meteorol(gy information and the operability of computers.

They appear as attachments to this procedure with Attachment I being the most preferred method and Attachment 3 being the least preferred.

1. Dose Projection By Computer (t10DCort)

The t!onticello Off-Site Dose Computation System (fl0DC0ti) is a computerized atmospheric dispersion and radiological dose assessment software system.

The system is specific for the ?!onticello Nuclear Generating Plant and is structured in the form of an executive main program (t!0DC0!!) and several subprograms. The sof tware system is coded in a high level interpretive language called C.L.A.S.S.,

The software runs on a Digital Equipment Corporation PDP-11/05 computer system which is located at the plant site. The software system uses methodology similiar to that prescribed in U.S. NRC Regulatory Guide 1.145, August, 1979 for the calculation of the atmospheric dispersion parameters.

Data required for input to the software system are: (1) meteorlogical informa-tion acquired from the meteorological tower (?!ET Tower) S.E.D. A.R. computer system, and, (2) plant stack and R.B. ventilation radioactive airborne effluents release rate information acquired from effluents monitors or dose rate readings converted to release rates.

Wind direction data is used to deter-mine the correct sector. Wind speed data is used to determine the plure dispersion parameters and maximum plume distance. Temperature difference values are used to determine the p]ume dispersion parameters. The plume is assumed to completely fill the sector in which it is located.

Release rate data is combined with dispersion data to yield dose rate data. The release rate data is input in the form of pCi/sec for noble gases and iodines for the plant stack and Reactor Building ventilation release points. Whole body, skin, and thyroid dose factors as well as default nuclide concentrat. ion ratios are contained in system mass storage files for use in calculating dose rates.

Data is accumulated into the prcgram at 15 minute intervals.

ihe program computes dose rates at the site boundary, the nearest receptor, and out to the maximum plume distance which may be anywhere from one mile to 10 miles in one mile increments or 15, 20, 30, 40 and 50 miles.

The dose rate values t re reported ir. mrem / hour. The dose rate values are multiplied by 0.25 to convert them to an accumulated dose for that 15 minute period. The dose values are then stored according to sector for the whole body, skin, and thyroid.

During the course of an accident, dose values are acomulated in several sectors, as the stack plume and R.B. vents plume are sometimes not in the st.me sector, and wind direction shifts will cause the E11 PROC 3G g

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Procedure A.2-406 Revision 1 Page 3 of 23 i.

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accumulated doses to be placed into several different sectors over a period of time.

Accumulated dose information may be extracted from storage and read out according to sector, or a specific distance from the plant for all sectors. Accumulated dose information is reported in~" mrem".

NOTE: Thyroid doses re calculated for the adult thyroid.

b Subprogram CALDOS (Option 1): The CALDOS sobprogram accepts meteorological tower data and effluents release data and calculates dose rates at various locations. Radioactive effluents release data are automatically corrected for_ decay during the~ course of an accident, but not for the time spent traveling in a plume after leaving the plant site.

?

Subprogram LSTSEC (Option 2): The LSTSEC subprogram extracts data from computer mass storage and reports accumulated dose values in any sector desired. The accumulated dose values are reported in mrem.

Subprogram FINDHI (Option 3): The subprogram FINDHI searches-the computer mass storage files and reports which sector contains the highest whole body dose, the highest skin dose, and the highest thyroid dose.

FINDHI also compares all the sector dose values to predetermined limits and reports in which sectors the maximum dose excceded the predetermined limit for whole body doses and thyroid doses.

2. Dose Projection By Hand Calculation Based On Known Release Rate-O)

This method projects whole body and thyroid doses resulting from a

(

known release rate.

Correction factors are provided for noble gases and iodines to adjust for elapsed time.

3. Dose Projection By Hand Calculatior Based On FSAR Accident Analysis This method calculates the whole body and thyroid doses in the event that no specific relear ; data is readily 'available. The. method is based upon FSAR Accident Analysis.

Since it is unlikely that the actual accident parameters will be the same as the accident analysis assumptions, this method is, at best, conse rvative.

PROCEDURE

' STEP 1: In the event of a known or suspected release of airborne ~ radioactive-materials, greater than MNGP Technical Specifications, immediately take actions to ascertain if a release did in fact take place (or will take place imminently).

If a release,did or will take place, proceed with the remaining steps of 'this procedure.

STEP 2: Determine'the appropriate.magnit'ude of the release using available'-

monitors or procedure A.2-405 (Release Rate Determinations). Further

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dose projection should be performed based on this preliminary estimate and-the following criteria:

f~ y For. all monitored releases in the NUE classification, dose a.

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projections ia accordance with -this procedure need not be performed as. a general rule, due 'to the minimal off-site significance of such releases.

Post-event evaluation of off-site doses for releases in the NUE classifi ati uay be hP

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Procedure A.2-406 Revision 1 Page 4 of 23 necessary to comply witn environn. ental technical specifica-tions.

In such cases, the off-site doses may be calculated using the methodology contained in the t1NCP Of f-Site Dose Calculation Manual (0DCM).

b.

For all other releases, dose projection shall be performed.

STEP 3: Based on the known parameters about the incident. and the availability of data and time, choose the most advantageous dose projection method.

Use the " Discussion" section of this procedure for guidance as necessary.

Go to the appropriate attachment of this procedure.

STEP 4: Ensure that all calculations are documentcJ on supplied worksheets and/or comnuter printout. Ensure that the dat.e and time appear on all worksheets.

STEP 5: Discontinue dose projection activities with the concurrence of the Radiological Emergency Coordinator when:

a.

The release has been terminated and no further release is expected, and b.

The emergency condition has been terminated or downgraded by the Emergency Director.

STEP 6: Complete Form 5790-406-3, OFF-SITE DOSE PROJECTION Cl!ECKLIST (Attachment 6)

REFERENCES 1.

Monticello Nucl. car Generating Plant Emergency Plan 2.

Monticello Nuclear Generating Plant Offsite Dose Calculations Manual 3.

NUREG-0654/ FEMA-R2P-1, " Criteria for Preparation and Evaluation of Radiological Emergency Response Plans and Preparedness in Support of Nuclear Power ' ta. ts" ATTACliMENTS 1.

Dose Projection by Computer (MODCOM) 2.

Dose Projection by Hand Calculation Based on Known Release Rate 3.

Example of Off-Site Dose Rate Projection Worksheet-Know Release Rate 4.

Dose Projection by liand Calculation Based on FSAR Accident Analysis 5.

Example of Off-Site Dose Prcjection Worksheet-FSAR Accident Analysis 6.

Example of Of f-Site Dose Projection Checklist 7.

Determination of Meteorological Data Using Instrumentation Available in the Control Room O

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Procedure A.2-406 Revision 1 Page 5 of 23

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ATTACllMENT 1 v

Page 1 of 4 DOSE PROJECTION BY COMPUTER (MODCOM)

PREREQUISITES Move the LA-36 terminal fr >m the Body Burden Analyzer Room as follows:

1.

Proceed to the Chemistry Count Room and place the computer system in the timesharing mode (RUN TSCO).

2.

Proceed to the Body Burden Analyzer Room and perform the following behind the LA-36 terminal:

a. Disconnect the cable labeled "LA-36" from the cable labeled " computer".

b. Connect the cable labeled " computer" to the cable labeled " Tech.

Supp. Center".

c. Unplug the LA-36 terminal from the 120 VAC line.

3.

Carry the LA-36 terminal to a predesignated position in the Technical Support Center.

I 4.

Connect the cable labeled "LA-36" to the cable labeled " computer" and plug the LA-36 terminal into the 120 VAC line.

5.

Turn on the MET Tower Data Terminal and the Plant Computer CRTs, if this has not already been d:ne. Release and meteorological data must be available for this method.

PROCEDURE STEP 1: Turn on printer and depress the "300 BAUD" button. Ensure that the terminal is on line.. The terminal will print:

TSX Version CIO7E (Date-Time)

STEP 2: Type in "RU3 CLASS" and press carriage return. The terminal will respond with:

CLASS V04.24-RT (DATE)

STEP 3. Type in "RUN MODCOM" and press carriage return. The terminal will respond with:

INITIAL EVALUATION ?

Procedure A.2-406 Revision 1 Page 6 of 23 ATTACllMENT 1 (Cont'd.)

Page 2 of 4 STEP 4: Respond as follows.

a.

If this is the initial evaluation, type in "Y" and press carriage return. The terminal will respond with a list of the available options in the MODCOM program ending with:

PLEASE ENTER THE OPTION YOU DESIRE:

CAUTION: Do not respond with "Y" unless this is the first post-release execution or this procedure, as all stored data will be lost.

b.

If this is a subsequent evaluation, type in "N" and press carriage return. The terminal will respond with:

PLEASE ENTER Tile OPTION YOU DES 1 RED:

STEP 5: Select one of the following options:

OPTION DF",CRIPTION 1

PERFORM TYPICAL 15 MIN. DOSE RATE CALCULATION 2

LIST ACCUMULATED DOSES FOR ANY SECTOR (A-R) 3 SEARCH ALL SECTORS FOR HIGHEST DOSE AND REPORT DOSE DATA and proceed to the appropriate portien of this procedure.

NOTE:

Option 1 should be used unless specific information available through one of the other options is sought.

STEP 6: PERFORM TYPICAL 15 MIN. DOSE RATE CALCULATION:

a.

Type in "1" and press carriage return.

The terminal will respond by requesting that you enter current date informat on.

Type in this information as it is requested. The terminal will then respond with:

PLEASE ENTER THE FOLLOWING METEOROLOGICAL DATA FROM THE SEDAR COMPUTER PRINTOUT:

NOTE:

If the meteorological tower data is unavailable, wind speed, direction and stability class can be obtained from Control Room Instrumentation at Panel C-20.

See of this procedure.

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Procedure A.2-406'-

Revision 1 Page 7 of 23

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~ ATTACHMENT 1 (Cont'd.)

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Page 3.of 4' r

4.

and proceed to tequest specific numerical information. Obtain-this information from the Met Tower Data Terminal and type it in as requested. The: terminal will respond with:

PLEASE ENTER THE FOLLOWING EFFLUENTS RELEASE RATE DATA:

1 L

and proceed to request specific numerical'information. Obtain:

4' this information from the Plant' Computer CRTs and type it'in as requested.

j -

'b.

The terminal will respond with a printout.of off-site dose 1

projections for the affected sector (s)-from the Site Boundary j-to a distance of 50 miles. Communicate this information to the Radiological Emergency Coordinator.

I c.

The. terminal will then print:

f PLEASE. ENTER.THE. OPTION'YOU DESIRE:

i d.

Type in the option number per STEP.5.or STEP 9.

,p NOTE:

MET data is updated every.15. minutes and'that'should be'the' frequency with which Option 1 is run during an-j; emergency condition with an airborna release. You ~

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- should continue to update dose rat < data every 15 minutes-4:

until the Radiological Emer./'ne Coordinator directs other -

' wise.

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STEP.7:. LIST ACCUMULATED DOSES FOR ANY SECTOR h'

I Type'in'"2" and press carriage return. The terminal..will' respond-a.

i with:

I-ENTER THE SECTOR (A-R)'FOR WHICH YOU WANT THE ACCUMULATED DOSES REPORTED.

y SECTOR:

i

'b.

' Type in the sector letter (A-R).

The terminal will respond with

'a printout of the accumulated doses for the affected'secto'r from

. the Site Boundary -to a distance of :50 miles.

Communicate this-information to the Radiologi' cal Emergency Coordinator.

c.

The terminal'will then print:

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- PLEASE ENTER THE OPTION YOU DESIRE:

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Procedure A.2-406 Revision Page 8 of 43 ATTACllMENT 1 (Cont'd.)

Page 4 of 4 d.

Type in the option number per STEP 5 or STEP 9.

STEP 8: SEARCII ALL SECTORS FOR IIIGIIEST DOSE AND REPORT DOSE DATA a.

Type in "3" and press carriage return. The terminal will respond with a printout of the accumulated dose values to the highest.

sector (s) as well as a list of the sectors where accumulated whole body or thyroid doses exceeded pre programmed limits.

Conununicate this information to the Radiological Emergency Coordinator.

b.

The terminal will then print:

PLEASE ENTER Tile OPTION YOU DES.TPE:

c.

Type in the option numbers per STEP 5 or STEP 9.

STEP 9: Should it be desirable to cease dose projection activities for extended periods of time (with the concurrence of the Radiological Emergency Coordinator), when the terminal prints:

PLEASE ENTER TIIE OPTION YOU DESIRE:

Type in "8" and press carriage return. You may subsequently re-enter the program by typing in "RUN MODCOM".

STEP 10 Upon receiving instructions from the Radiological Emergency Coordinator to secure from dose projection activities, turn off all equipment and ensure that all data is appropriately filed. Return to ST3P 4 of the main procedure.

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Procedure A.2-406 Revision 1 Page 9 of 23 ATTACHMENT 2 Page 1 of 3 DOSE PROJECTION BY HAND CALCULATION BASED ON KNOWN REi. EASE RATE EQUIPMENT REQUIRED 1.

X/Q-Catalog (TSC) 2.

Calculator (with scientific notation capability) 3.

Supply of 0FF-SITE DOSE RATE PROJECTION WORKSHEET-KNOWN RELEASE' RATE Forms (TSC), Form 5790-406-1 (Attachn.ent 3)

PROCEDURE STEP 1: In the INPUT DATA section of the worksheet, enter the date and time for which this projection will be made.

STEP 2: Enter the TI!!E AFTER REACTOR TRIP value. This is the elapsed time from the reactor trip to the time recorded in-STEP 1.

If there has not been a reactor trip, enter ZERO.

STEP 3: Determine the necessary meteorological parameters'and record'as indicated, on the worksheet. This data should be taken from the meteorological tower printer in the Technical Support. Center.

If the ~ printer is unavailable, an individual may be stationed at the meteorological tower to relay the.infor-

-C mation via the telephone DELETED 4

RB Vent Stability Class - Divide the value for DTI by.100, paying a.

attention to whether the value is' positive or negative. Use the result to enter Table I.

Record'the class designation.

b.

Stack Stability Class - Divide the value for DT2 by 100, paying attention to'whether the value is positive or negative.

Use the result to enter Table I.

Reccrd the class designation.

RB Vent Windspeed - Record the windspeed at the 33 feet level (usei c.

1 mph when indication is zero).

d.

Stack Windspeed - record the windspeed at the'330 feet. level (use-1 mph when indication is zero).

Stack Wind Direction.- Record the wind direction at the 300 feet e.

Icvel.

(If value' is greater - than 360, subtract 360 before record-ing.)

NOTE:

If meteorological tower data is unavailable, windspeed, wind direction and stability class can be obtainei from Control

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R(iom-instrumentation at Panel C-20.

See Attachment'7 of-

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thi* procedure.

'EMPROC3G' D

d Procedure A.2406 Revision 1 Page 10 of 3.3 Cb ATTACllMENT 2 (Cont'd.)

Page 2 of 3 TABLE I

_ nility Class RB Vent (D1'1/100)

Stack (DT2/100)

A*

Less than -0.62 Less than -1.71 B

-0.62 to -0.56

-1.71 to -1.53 C

-0.55 to -0.49

-1.52 to.-l.35 D

-0.48 to -0.16

-1.34 to -0.45 E

-0.15 to +0.49

-0.44 to +1.35 F

+0.50 to t1.31

+1.36 to +3.60 G**

Greater than +1.31 Greater than +3.60 Use Stability Class B (A not analyzed)

Stability Class G is not to be used.

(Ref: Letter of 3/9/81 from certified consulting meteorologist to Bert Clark.) Use Class F when G is indicated.

STEP 4: Determine and record the SECTOR designation (A-R).

Use the 330 feet wind direction and Table II to find the letter designation for the 4

area directly downwind frcm the plant.

NOTE:

If the wind speed indicates zero, use Sector designation "L" (most critical sector based on nearest receptor).

TABLE Il

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4 Wind Direction (degrees from)

Sector 168.75-to 191.25 A

191.25 to 213.75 B

l 213.75 to 236.25 C

-236.25~to 258.75 D

258.75 to 281.25 E

281.25 to 303.75

-F 303.75 to 326.25

.G 326,25 to 348.75 H

348.75 to 11.25 J

11.25 to 33.75 K

33.75 to 56.25' L

56.25 to 78.75 M

78.75 to 101.25 N

101.25 to 123.75 E

123.75 to-146.25-

.Q, 146'.25 to 168.75 R

STEP 5: From the X/Q. Catalog, select and record the X/Q values. as required.

Part One of the Catalog is divided tnto sectors and contains the values.for Stack releases and Vent releases ~to the Site Boundary i

and. nearest receptor..Part two contains the values for other

. Mc l-Vent releases ~ (which values are independent of sector designation).

- Use the fumigation X/Q value for one hour af ter sunrise. -(This-is.

a conservative approach.)

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Procedure A.2-406 Revision 1 Page 11 of123 h

V ATTACllMENT 2 (Cont'd.)

Page 3 of 3 STEP 6: From Table III, determine and record the Noble Cases Factor and the Iodines Factor as appropriate for the elapsed time value previously recorded.

TABLE III Elapsed Time (Hours)

Noble Gases Iodines From To Factor Factor 0.00 0.50 6.49E-01 1.14E-05 0.50 1.00 5.48E-01 1.29E-05 1.00 2.00 4.06E-01 1.43E-05 2.00 4.00 3.43E-01 1.66E-05 4.00 8.00 2.93E-01 1.97E-05 8.00 16.00 1.65E-01 2.37E-05 16.00 24.00 8.70E-02 2.92E 24.00 48.00 6.10E-02 3.36E-05 48.00 96.00 3.90E-02 4.34E-05 96.00 168.00 3.30E-02 5.39E-05 168.00 336.00 3.30E-02 5.79E-05 336.00 720.00 3.20E-02 5.87E-05 720.00 1440.00 2.60E 5.87E-05

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1440.00 Beyond 3.60E-03 5.87E-05 STEP 7: Record the release rates (pCi/sec) for the gas and iodine portions of the stack and vent. effluents. The gas portion release rate's may be obtained directly fron. effluent monitor ' readings. 'If direct monitor.

readings are unavailable, obtain release rates from procedure A.2-423 (Release Rate Determination). The iodine portions will be determined by Radiation Protection Group personnel through actual samples.

If sample analysis data is not available, record "not available".

STEP 8: Using the values recorded in the INPUT DATA section, complete calcula-tions for the "ite' Boundary, Nearest Receptor, and 1 mile, as required.

NOTE:

If actual data is not available for iodine' release rate, estimate dose rates to the thyroid by applying a factor of 6E-07 to the whole-body dose rate as c'alculated by this procedure.3 STEP 9: If calculations for additional-locations are required, ' select the appropriate X/Q values and: complete the calculations in the spaces provided for-LOCATION OF' INTEREST.

STEP 10 Upon: receiving = instructions from the Radiological Emergency Coordinator to secure fror. lose' projection activities, return :

to STEP 4 of the main procedure.

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This factor is taken from EPA-520/1-75-001. The calculation is based

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assumption that the ratio of iodines to-noble gases in the mixture available for release is.0.4.

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Procedure A.21406 Revision 1 Page 12 of 23 ATTACllMENT 3 Form 5790-406-1, Rev. O, 03/12/81 Page 1 of 2 Example of 0FF-SITE DOSE RATE PROJECTION WORKSifEET - KNOWN RELEASE RATE (For Use With Procedure A.2-406, Attacitment 2)

INPUT DATA Time Date Time After Reactor Trip _

hours Stability Class: RB Vent Stack Windspeed:

RB Vent

__ mph Stack mph Wind Direction:

Sector X/Q Values:

RB Vent - Site Boundary (AA)

- Nearest Feceptor (BB)

- L2Z Outer Boundary (CC)

Stack -

S!.te Boundary (DD)

Nearest Receptor (EE)

LPZ Outer Boundary (1.aile)

(FF)

Noble Gases Factor (GG)

Iodines Factor (HH)

Release Rates:

RB Vent - Gas (JJ)

(pCi/sec)

- Iodines (KK)

Stack -

Gas (LL)

Iodines (MM)

FORMAT OF DATA FROM MET TOWER DAYTIME 33' 140' 330' 33' 140' 330' 33' DT1 DT2 DEU RAIN RN AC0F DVI WS WS WS WD WD WD TEMP 140 330 PNT s

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]FFI] L )) t l

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Procedure A.2-406 Revision 1 Page 13 of 23 ATTACIDIENT 3 (Cont'd. )

Form 5790-406-1, Rev. O, 03/12/81 Page 2 of 2 Example of 0FF-SITE DOSE RATE PROJECTION WORKSIIEET - KNOWN RELEASE RATE (Cont'd.)

CALCULATIONS 1.

Site Boundary GG x [(AA x JJ) + (DD x LL)] =

Whole Body-mrem / hour lHI x [ ( A A x KK) + (DD x 1D1)] =

Thyroid-mrem / hour (adult) 2.

Nearest Receptor GG x [(BB x JJ) + (EE x LL)] =

Whole Body-mrem / hour 101 x [(BB x KK) + (EE x 1D1)] =

Thyroid-mrem / hour (adult) 3.

LPZ Outer Boundary (1 aile)

GG x [(CC x JJ) + (FF x LL = Whole Body-mrem / hour IDI x [(CC x KK) + (FF x FD1)] = Thyroid-mrem / hour (adult) 4, Location of Interest RB Vent X/Q at Location of Interest (IPf) Stack X/Z at Location of Interest (PP) GG x [(NN x JJ) + (PP x LL)] = Whole Body-mrem / hour IUI x [(NN x KK) + (PP x FDI)] = Thyroid-mrem / hour (adult) 5. Location of Interest RB Vent X/Q at Location of Inter st (NN) Stack X/Q at Location of Interest (PP) GG x [(NN x JJ) + (PP x LL)] = Whole Body-mrem / hour HH x [(NN x KK) + (PP x rel)] = Thyroid-mrem / hour (adalt) 6. Location of Interest RB Vent X/Q at Location of Interest (NN) Stack X/Q at Location of Interest (PP) GG x [(NN x JJ) + (PP x LL)J = Whole Body-mrem / hour HH x [(NN x KK) + (PP x FDI)} = Thyroid-mrem / hour (adult) REVIEW AND APPROVAL Completed by: / Date: Reviewed by: Date: Rad. Emerg..cordinator NOTE: After this cnecklist is completed and is not requi red for immediate use, it : hall be placed in the appropriate containet provi<iad for Emergency Records. ErlPROC3G O '~3~)~ QO gQ 1 A a

Procedure A.2-406.. Revision 1 Page 14 of 23 ATTACllMENT 4 Page 1 of 6 DOSE PROJECTION BY llAND CALCULATION _ BASED ON FSAR ACCIDENT ANALYSIS EQUIPMENT REQUIRED 1. Calculator - if available 2. Supply of 0FF-SITE DOSE PROJECTION WORKSIIEET - FSAR ACCIDENT ANALYSIS FORMS (TSC) PROCEDURE STEP 1: Enter the date and time for which this projection is being made. STEP 2: Determine the necessary meteorological parameters and record as indicated on the worksheet. This data should be taken from the meteorological tower printer in the Technical Support Center. If the printer is unavailable, an individual may be stationed at the meteorological tower to relay the information via teiephone. DELETED Stach Stability Class - nivide. the value for DT2 by 100, paying a. attention to whether the value is positive or negative. Use the result to enter Table I. Record the class designation. b. Stack Windspeed - Re :ord the windspeed at the 330 feet level (use 1 mph when indication is zero). Convert to meters per second as indicated on the worksheet. c. Stack Wind Direction - Record the wind direction at the 330 feet level. (If value is greater than 360, subtract 360 before recording.) NOTE: If meteorological tower data is unavailable, windspeed, wind l direction and stability class data can be obtained from Control Room instrumentation, at Panel C-20. See Attachment 7 of this procedure. TABLE I Stability Class Stack (DT2/100) l Ad Less than -1.71 B -1.71 to -1.53 C -1.52 to -1.35 D -1.34 to -0.45 E -0.44 to +1.35 F +1.36 to +3.60 G*' Greater than +3.60 Use Stability Class E (A not analyzed) ( i Use Stability Class F (Ref: Letter of 3/9/81 from certified consulting meteorologist to Bert Clark.) EMPROC3G g-[- gn _ a lro _a JkD

. Procedure A.2-406 Revision 1 Page 15 of 23 . ATTACHMENT 4 (Cont'd.) Page 2 of 6 STEP 3: Determine and record the. SECTOR' designation (A-R). Use the 330 feet wind direction and Table II to find the letter designation for the area directly downwind from the plant. NOTE: If the wind opeed indicates zero, use Sector designation "L" (most critical sector based on nearest receptor). TABLE II Wind Direction Sector 168.75 to 191.25 ?, 191.25 to 213.75 B 213.75 to 236.25 'C 236.25 to 258.75 D 258.75 to 281.25 E 281.25 to 303.75 F. 303.75-to 326.25 G 326.25 to 348.75~ H 348.75 to 11.25 J l. 11.25 to 33.75 K l 33.75 to 56.25 L f '56.25 to 78.75 M 78.75 to 101.25 N-l 101.25 to 123.75 P 123.75 to 146.25 Q 146.25 to 168.75 R i i STEP 4: After the Stability Class has been determined, use the appropriate table (Tables III through VI) for dose projections. Note that four accidents are analyzed. If the accident is unknown or not one of the four, use Table VI (Steam Line Break Accident). Enter the dose projections on the worksheet. Note the. Table used. STEP 5: Upon receiving instructions from the Radiological Emergency Coordinator to secure from dose projection activities, return to STEP 4 of the main procedure. t 9 O I F F. ] L 3 1 T

Procedure A.2-406 Revision 1 Page 16 of 23 ATTACIIMENT 4 (Cont'd.) Page 3 of 6 TABLE III RADIOLOGICAL EFFECTS OF TifE CONTROL ROD DROP ACCIDENT First 2-Ifour Dose Distance Miles G F E D C B -3 -3 -3 -3 1/3 7.2 x 10 4.8 10 4.8 x 10' 1.4 x 10~ 4.8 x 10 1.5 x 10 -3 -3 -3 -3 -3 ~ 1 4.4 x 10 2.4 x 10 2.8 x 10 1.1 x 10 1.7 x 10 6.8 x 10 ' -3 -3 -3 3 2.0 x 10 1.2 x 10 1.1 x 10 4.2 x 10 3.8 x 10 ' 1.6 x 10' ~ -3 ~ -4 ~ 5 1.2 x 10 8.4 x 10 ' 5.9 x 10 2.2 x 10 ' 1.6 x 10 7.9 x 10~ -5 -5 10 6.2 x 10 4.4 x 10' 1.7 x 10 8.0 x 10 4.2 x 10 2.8 x 10 ~ Lifetime Thyroid Dose (rem) -5 -5 1/3 a a 3.4 x 10~ 1.7 x 10' 9.4 x 10 2.8 x 10 -5 -5 -5 -5 1 a 2.0 x 10~ 7.4 x 10 2.0 x 10 5.6 x 10 2.2 x 10 -6 -5 -5 -5 -6 3 a 9.8 x 10 3.6 x 10 1.4 x 10 1.2 x 10 5.0 x 10 -5 -5 -6 -6 -6 5 a 1.8 x 10 1.9 x 10 7.9 x 10 6.2 x 10 2.4 x 10 ~9 -5 -6 -6 -6 10 3,2 x 10 2.2 x 10 7.4 x 10 3.0 x 10 2.2 x 10 8.6 x 10 ~ Total Dose Distance Miles G F E D C B Passing Cloud Whole Body Dose (rem) -3 -3 -3 -3 3 1/3 7.4 x 10' 5.0 x 10 5.2 x 10 1.5 x 10 5.0 x 10 1.6 x 10 -3 -3 -3 -3 1 4.6 x 10-2.6 x 10 3.0 x 10 1.1 x 10 1.8 x 10 7.2 x 10' -3 -3 ~3 -4 3 2.2 x 10 1.3 x 10 1.2 x 10 4.6 x 10 4.0 x 10~ 1.7 x 10" -3 ~0 -4 -4 -4 -5 5 1.3 x 10 9.0 x 10 6.0 x 10 2.4 x 10 1.6 x 10 8.2 x 10 -4 -4 -5 -5 10 6.6 x 10 4.6 x 10 1.8 x 10~ 9.0 x 10 ' 4.6 x 10 2.8 x 10 Lifetime Thyroid Dose (rem) -6 -9 1/3 a a 1.2 x 10 6.2 x 10 3.4 x 10~ 1.0 x 10 ~ -5 -4 -5 1 a 7.4 x 10~ 2.8 x 10~ 7.4 x 10 2.0 x 10 8.2 x 10 -5 -5 -5 -5 3 a 3.6 x 10 1.3 x 10 5.4 x 10 4.6 x 10 1.8 x 10 -5 -5 -5 ~ -6 5 a 6.6 x 10 7.0 x 10 ^ 8 x 10 2.2 x 10 ~ 8.6 x 10 -5 ~ -6 10 1.1 x 10~ 7.6 x 10 2.6 x 10 1.1 x 10 8.2 x 10~ 3.0 x 10' -10 The syr.ibul "a" means less than 1 x 10 c,3 m EMPROC3G bO -. -] S l c - o

Procedure A.2-406 Revision 1 Page 17 of 23 (3 ( ) ATTACIIMENT 4 (Cont'd. ) v Page 4 of 6 TABLE IV RADIOLOGICAL EFFECTS OF T:IE LOSS OF COOLANT ACClaENT First 2-Hour Dose Distance Miles G F E D C B 1 Passing Cloud Whole Body Dose (rem) -5 -5 -5 -6 -5 -6 l 1/3 1.7 x 10 1.1 x 10 1.1 x 10 3.4 x 10 1.1 10 3.8 x 10 -5 -6 -6 ~0 1 1.0 x 10 5.8 x 10~ 6.8 x 10 2.6 x 10~ 4.0 x 10 1.6 x 10 -6 ~7 3 4.8 x 10 3.0 x 10 2.8 x 10-1.0 x 10 8.8 x 10' 4.0 x 10 -6 -6 -6 ~7 5 3.0 x 10 2.0 x 10 1.3 x 10 5.4 x 10~ 3.8 x 10~ 1.8 x 10 -6 -6 -7 -7 -7 -8 10 1.5 x 10 1.0 x 10 4.2 x 10 2.0 x 10 1.0 x 10 6.4 x 10 Lifetime Thyroid Dos (Rem) -9 -6 -7 1/3 a a 4.4 x 10 a 1.3 x 10 4.0 x 10 -6 1 a 2.8 x 10-1.0 x 10 2.8 x 10" 8.2 x lo-3.4 x 10- -7 -7 3 a 1.3 x 10~ 5.2 x 10 2.0 x 10-1.8 x 10 7.0 x 10' ( ~ 2.6 x 10 1.1 x 10~ 8.6 x 10 3.2 x 10 ~7 -8 -b 5 a 2.4 x 10 ~9 ~7 -8 -8 -8 10 4.4 x 10 3.0 x 10-1.0 x 10 4.2 x 10 3.2 x In 1.1 x 10 Total Dose Distance Miles G F E D C B Passing Cloud Whole Body Dose (Rem) -4 ~ ~ 1/3 5.8 x 10 4.0 x 10 ' 4.0 x 10-1.2 x 10 ' 4.0 x 10 ' 1.3 x 10 ' -5 ~ 1 3.6 x 10 2.0 x 10-2.4 x 10~ 9.0 x 10 1.4 x 10 ' 5.6 x 10-5 3 1.6 x 10 9.6 x 10

1. 0 < 10 3.6 x 10 3.2 x 10 1.3 x 10

-5 -0 -5 -5 -5 -4 -5 -5 ~ -5 -6 5 1.0 x 10 6.6 x 10 4.8 x 10 1.9 x 10 ' 1.3 x 10 6.6 x 10 -5 -5 -5 -6 -6 ~0 10 5.0 x 10 3.8 x 10 1.4 x 10 7.0 x 10 3.6 x 10 2.2 x 10 Lifetime Thyroid Dose (Rem) ~7 -10 -5 -5 1/3 a a 1.8 x 10 9.0 x 10 5.2 x 10 1.5 x 10 -5 -5 -5 1 a 1.1 x 10-4.2 x 10 1.1 x 10-3.2 x 10 1.3 y 10 -6 -5 -6 -6 -6 3 a 5.2 x 10 2.0 x 10 8.6 x 10 7.0 x 10 2.8 x 10 -5 -5 -6 -6 5 a 1.0 x 10 1.0 x 10 4.4 x 10 3.4 x 10 1.3 x 10 -5 -6 ~7 10 1.7 x 10~ 1.1 x 10 4.0 x 10 1.6 x 10~ 1.2 x 10-4.6 x 10 -10 The symbol "a" means less than 1 x 10

~ Procedure A.2-kO6 I Revision 1 Page IE of 23 ATTAClelENT 4 (Cont 'd. ) Page 5 of 6 TABLE V RADIOLOGICAL EFFECTS OF THE REFUELING ACCIDENT First 2-Ilour Dose Distance Miles G F E D C B Passing Cloud Whole Body Dose (rem) 1/3 1.4 x 10' 9.8 y 10 1.0 x 10-3.0 x 10 9.8 x 10 3.2 x 10 -4 -0 1 9.0 x 10 5.0 x 10 6.0 x 10 2.2 x 10 3.4 x 10 1.4 x 10- -0 -5 -5 -5 3 4.0 x 10-2.6 x 10 2.4 x 10' 8.8 x 10 7.6 x 10 3.4 x 10 5 2.6 x 10 ' 1.7 x 10 1.2 x 10 4.6 x 10 3.2 x 10 1.6 x 10 -5 -5 -5 -0 -5 -5 -6 -6 10 1.3 x 10 8.8 x 10 3.6 x 10 3,7 . 10 8.8 x 10 5.6 x 10 Lifetime Thyroid Doce (rem) -0 -8 1/3 a a 2.2 x 10 1.0 x 10 6.0 x 10 1.7 x 10 -6 -0 1 a 1.3 x 10 4.8 x 10 1.2 x 10' 3.6 x 16-1.4 x 10 ' -5 -5 -5 -5 3 a 6.2 x 10 3.2 x 10' 9.4 x 10 8.2 x 10 3.2 x 10 -5 -5 -5 5 a 1.1 x 10-1.2 x 10 5.0 x 10 4.0 x 10 1.4 x 10 -5 -5 -5 -6 10 2.0 x 10-1.3 x 10 4.6 x 10 1.9 x 10 1.4 x 10 5.4 x 10 Total Dose G F E D C B Passing Cloud Whole Body Dose (rem) -3 -3 -3 -3 -3 1/3 7.0 x 10 4.6 x 10 4.8 x 10 1.4 x 10 4.6 x 10 1.5 x 10- -3 -3 -4 1 4.4 x 10 2.4 x lo-T.8 x 10 1.0 x 10-1.6 x 10-6.6 x 10 -3 -3 -3 -4 3 1.9 x 10 1.2 x 10 1.2 x 10 4.2 x 10-3.6 x If 1.6 x 10 -3 -4 -0 5 1.2 x 10

8. '1 x 10 5.6 x 10-2.2 x 10 '

1.5 x 10' 7.6 x 10 10 6.0 x 10 4.2. x 10 ' 1.7 x 10-8.2 x 10 4.2 x 10 2.6 x 10 -5 -5 -0 Lifetime Thyroid Dose (rem) -10 -5 -8 -3 -3 1/3 a 4.8 x 10 1.4 x 10 7.0 x 10 3.8 x 10 1.1 x 10 -6 -3 -3 1 a 8.4 x 10 3.0 x 10 8.4 x 10-2.4 e 10 9.2 x 10 4.0 x 10 ' 1.5 x 10 6.0 x 10-5.2 x 10 ' 2.0 x 10- -3 3 a -4 -5 7.4 x 10" 7.8 x lo-3.2 x 10 2.6 x lo-9.6 x 10 5 a 10 1.3 x 10 8.6 x 10' 3.0 x 10 1.2 x 10 ' 9.4 x 10 3.4 x 10 -7 -4 -5 -5 -lo The symbol "a" means less than 1 x 10 EMPROC3G l a f f _J _ lrd a a

Procedure A.2-406 Revision 1 I Page 19 of 23 r r \\j ATTACIDIENT 4 (Cont'd.) i i: Page 6 of 6 l }' -I i TABLE VI RADIOLOGICAL EFFECTS OF STEAM TINE BREAK ACCIDENT (TOTAL DOSE) i 1 j. Distance _M._i. l e s G 'F E D -C B i Passing Cloud Whole Body Dose'(rem) -3 -3 -3 -3 ~ .r 1/3 - 4.3 x 10 4.5 x 10 4.3 x.10 8.5 x 10 2.0 x 10 4.6 x 10 ' 2 1 1.0 x 10-3 2.8 x 10-3 -3 -4 -4 1.9 x 10 3.6 x 10 4.5 x 10 1.2 x 10 4 4 -3 -3 -0 -5 -5 -5 3 1.6 x 10 1.3 x 10 4.9 x 10 9.8 x 10 6.7 x 10 2.1 x 10 5 9.8 x 10 7.4 x 10 2.1 x 10" 4.5 x 10-5' 2.~4 x 10-5 -6' 8.2 x 10 2 -4 -4 -5 -5 -6 -6 10 4 3 x 10 2.8 x 10 4.9 x 10 1.4 x 10 4.8 x 10 2.2 x 10 l Lifetime Thyroid Dose (rem) 4 -3 0 0 -1 -1 -1 1/3 1.3 x 10 1.6 x 10 2.0 x 10 4.1 x 10 6.6 x 10 1.7~x 10 -2 0 -I -2 -2 ~ 1 1.5 x 10 1.0 x-10 4.8 x 10 1.42 x 10 8.9 x 10 2.3 x 10 -2 -I -2 -2 -2 -3 3 9.9 x 10 3.8 x 10 7.3 x 10 2.2 x 10 1.2 x 10 3.1 x 10 -1 -1 -3 -3 -3 5 1.4 x 10 2.0 x 10 2.9 x.10 ' 9.0 x 10 4.7 x 10 1.'2'x 10 -1 -2 -3 -3 -4 1 10 1.3 x 10 7.6 x 10 .8.4 x 10 2.6 x 10'3 1.3 x 10 3.4 x-10 f 4 i 1 J 1 l J. l 1 i I s 1 s ...v,-. ~. _ _._ ,,--._,.,,,-.,w..,,,,,,,_,,...~,.._,,-,_-_,--m-_.,_m, .,.,--~~,.,--~,--..,e. ~ ~, -,,, -.

Procedure A.2-4V6 Revision 1 Page 20 of 23 ATTACllMENT 5 Form 5790-406-2, Rev. O, 03/12/81 Page 1 of 2 Example of 0FF-SITE DOSE PROJECTION WORKSirEET-FSAR ACCIDENT ANALYSIS (Fer Use With Procedure A.2-406, Attachment 4) DATA Time Date Stack Windspeed _ mph x 0.447 = _ m/s Stack Stability Class Win? Direction Affected Sector (s) DOSE PROJECTIONS Frcm Table: WIIOLE BODY DOSE l Distance First 2 Ilour Total Miles Dose (Rem) Dose (Rem) l 1/3 1 l 3 I s 1 l 10 0 E!! PROC 3G []

j Procedure-A.2-406 Revision 1 Page 21 of 23 i, i } x . ATTACHMENT 5 (Cont'd.)' f f' { Form 5790-406-2, Rev. O, 03/12/81 j' Page 2 of 2 1 z Example of j OFF-SITE DOSE PROJECTION WORKSHEET - FSAR' ACCIDENT ANALYSIS (Cont'd.) 5 i {- - LIFETIME THYROID DOSE i 7 Distance First 2 Hour Total t Miles Dose (Rem) _ Dose (Rem) e 1/3' 1 1 1 '3 5 l^ 10 L l } REVIEW AND APPROVAL U l-Completed by: / Dite: l Reviewed by: Rad. Emerg. Coord. .Date: i j NOTE: Af ter thisc checklist is completed and is not required for immediate I use,.it shall be placed in the appropriate container.provided for l Emergency Records. l i e' d.- 4 I 4 a l i,.__ .. ~ - - -.. ~ -.... -. -, ~

1 Procedure A.2-606 Revision 1 Page 22 of 23 9i ATTACHMENT 6 1 Fo rm 5790-406-3, Rev. O, 03/12/81 Page 1 of 1 Example of 0FF-SITE DOSE PROJECTION CHECKLIST (For Use With Procedure a.2-406) 1. Release confirmed to have occurred or be imminent. Source of release: Time Date Initial 2. Estimated magnitude of release: Time Date Initial 3. Dose projection initiated? (YES / NO) Method selected: (Computer /know release rate /FSAR Accident Analysis). Time Dr.te Initial 4. Dose projection discontinued:

Reason

Time Date Initial Performed by: Completed. Time: Date Reviewed: Date: Radiological Emergency Coordinator NOTE: After this checklist is completed and is not required for immediate use, it shall be placed in the appropriate container provided for Emergency Records. O ff~ ~h~ @O D EMPROC3G a f T . S lyd a Sa

Procedure A.2-406 Revision 1 Page 23 of 23' f% ATTACHMENT 7 - Determination of Meteorological Data Using Instrumentation { Available In The Control Room In the event the Met Tower data is not available, either from the printer at the TSC, or from the recorders at the Met Tower, the wind speed, direction and stability class can be determined from the instrumentation in the Control Room. In this event, only one set of data (speed, direction and stability) is available, and is to be used for both reactor building and stack releases. STEP 1: Read wind speed and direction off wind speed recorder on CO-20. Use the average wind speed and direction from the past 15 minutes - visual obser-vation. STEP 2: Determine the stability class using the STABILITY CLASS INDICATOR located in the back of panel C20. For the first reading, verify the instrument is properly set up by performing the following: a. Verify the SIGMA thumbwheel switch is set at 15. b. Verify the SYNCHRO-DC switch is set at 0-100. c. Verify the A/C - D/C switch of the Flute Multimeteris in the AC position (pushbut an in). d. Verify the 200 mv range is selected. Turn the power switch of the Fluke 8020A Multimeter to ON (green e. switch on left side of instrument). f. Read the scale of the multimeter (units are mv). g. Determine stability class by using the following table: Multimeter Reading Stability Class 2 22.5 mv A (extremely unstable) NOTE 1 < 22.5 mv to 2 17.5 mv B.(moderately unstable) < 17.5 mv to > 12.5 mv C (slightly unstable) < 12.5 my to >_ 7.5 mv D (neutral) '7.5 mv to [ 3.8 mv E (slightly stable) < 3.8 mv to >~ 2.1 mv F (moderately stable) Less than 2.1 mv G (extremely stable). NOTE 2 NOTE 1: Use Stability Class B (A not analyzed). NOTE 2: Use Stability Class F (

Reference:

- Letter of March 9,1981-from certified consulting meteorologist to Bert Clark).

O h. When Het Tower data is no longer required, turn the multimeter power ( switch to 0FF. EMPROC3G g-gm S f f _ A lid a NU .}}