ML20031F055

Public Version of Revision 2 to Emergency Plan Implementing Procedures A.2-406, Offsite Dose Projection

ML20031F055
Person / Time
Site:	Monticello
Issue date:	06/18/1981
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML113190724	List: ML20031F049 ML20031F055
References
A.2-406, NUDOCS 8110190106
Download: ML20031F055 (24)

Text

Approv:d A.2 EMERGENCY PLAN IMPLEMENTING PROCEDURES LIST OF CURRENT PROCEDURES PROCEDURE PROCEDURE TITLE REVISION NUMBER 000 Series Organization 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 On-Site Monitoring During an Emergency 0

A.2-202 Off-Site Monitoring Durng an Emergency 0

A.2-203 Evacuation Criteria for On-Site Personnel 0

A.2-204 Off-Site 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 0

A.2-402 Contamination Control 0

A.2-403 Emergency Surveys O

A.2-404 Emergency Sampling and Analysis 0

A.2-405 Release Rate Determination 0

A.2-406 Off-Site Dose Projection 2

A.2-407 Personnel and Vehicle Monitoring 0

A.2-408 Sample Coordination During an Emergency 0

500 Series Communications and Documentation A.2-501 Communication During an Emergency 0

A.2-502 Recordkeeping During an Emergency 0

A.2-503 Emerger'y Reports and Documentation 0

600 Series Re-Entry and Recovery A.2-601 Re-Entry 0

A.2-602 Transition to Recovery Plan 0

700 Series A.2-702 Response to an Emergency at Prairie Isloud 0

A.2 LCP f;PDR ADOCK8110190106 811009 05000263

.F PDR

Pracsdura A.2-406 R;visica 2 Page 1 of 23 Op. Com. Rev. Req'd. -Yes _X_ No Q.A. Review Req'd.

Yes No X ALARA Review Req'd.

ves No X OFF-SITE DOSE PROJECTIG3 A.2-406 REVIEW AND APPRO '

[

Prepared by:

A F)

ALARA Review: Revision 0 Date 3/29/81 Reviewed by: hbh Q.A. Review:

Revision 0 Date 3/29/81 Operations Committee Final Review: Meeting Number _i 976 Date /p do # F/

Approved by:

km Date 8-1I-8/

Op. Com. Results Review: Not Required Mtg.#u_ 949 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 a'> normal 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 oftea 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. Alternate methods are provided to cover possible contingencies such as offscale monitors, inoperative instrumentation, etc.

CONDITIONS AND PREREQUISITES A.

An emergency condition has been declared at MonticeIIo 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.

PRECAUTIONS 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 fif ty miles in each sector. Contained within the regions of interest are three special locations of interest. The special locations are the site EMPROC3G

Prcctdura A.2-dO6 RIvision 2 Page 2 of 23 boundary, the nearest receptor and the Low Population Zone (L.P.Z.) outer bounda ry.

The site bounda'ry and the nearest receptor locations dif fer for

-w each sector. The L.P.Z. outer boundary locations coincide with the one tJ) mile distance from the plant.

B.

Dose Projection Methods This procedure provides 3 different calculational methods for performing dose projections. The method (s) used will depend on the availability of release and me.corology information and the operability of computers.

They appear as attachments to this procedure with Attachment 1 being the most preferred method and Attachment 3 being the least preferred.

1. "~te Projectioa By Compute- (MODCOM)

The Monticello Off-Site Dose Computation System (MODCOM) is a computerized atmospheric dispersion and radiological dese assessment software system.

The system is specific for the Monticello Nuclear Generating Plant and is structured in the form of an executive main program (MODCOM) and several subprograms. The software 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 j

site. The sof tware system uses methodology similiar to that prescribed in U.S. NRC Regulatory Guide 1.145, August, 1979 for the calculation of r

2 the atmospheric dispersion parameters.

Data required for input to the software system are: (1) meteorlogical informa-tion acquired from the meteorological tower (MET Tower) S.E.D.A.R. computer- ])

system, and, (2) plant stack and R.B. ventilation radioactive airborne efflu'ents release rate information acquired from ef fluents monitors or dose rate readings converted to release rates. Wind dir-tion data is used to deter-mine the correct sector. Wind speed data is used to determine the plume dispersion parameters and maximum plume distance. Temperature difference values are used to determine the plume 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 mci /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 concentration ratios are contained in system mass storage files for use in calculating dose rates. Data is accumulated into the program at 15 minute intervals. The 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 are reported in 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 accumulated in several sectors, as the stack plume and R.B. vents plume are sometimes not in the same sector, and wind direction shifts will cause the EMPROC3G l

Prccrdura A.2-406 Rsvisien 2 Paga 3 of 23 accumulated dores to be placed into several different sec*. ors 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 are calculated for the adult thyroid.

Subprogram CALDOS (Option 1): The CALDOS subprogram accepts meteorological tower data and effluents release data and calculates dose rates at various locations. Radioactiv. effluents release data are automatically corrected for decay during the c-trse of an accident, but not for the time spen

• traveling in a plume a_ter leaving the plant site.

Subprogram LSTSEC (Option 2): 1La 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 tc predetermined limits and reports in which sectors the maximum dose exceeded the predetermined Ibnit for whole body doses and thyroid doses.

2. Dose Projection By Hand Calculation Based On Known Release Rate This method projects whole body and thyroid doses resulting from a known release rate. Correction factors are provided foi noble gases and iodines to adjust for elapsed time.

3. Dose Projection By Hand Calculation Based On FSAR Accident Analysis This method calculates the whole body and thyroid doses in the event that no specific release 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 rva tive.

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 pl.ce (or will take place imminently).

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

STEP 2: Determine the appropriate magnitude of the release using available monitors or procedure A.2-405 (Release Rate Determinations). Further dose projection should be performed based on this preliminary estimate and the following eriteria:

Fer all monitored releases in the NUE classification, dose a.

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

Post-event evaluation of off-site d.;es for releases in the NUE classificat. ion may be EMPROC3G

Preccdura A.2-406 Rsvisica 2 Page 4 of 23 neccssary to comply with environmental technical specifica-tions.

In such ca'ses, the off-site doses may be calculated eS using the methodology contained in the MNGP Off-Site Dose Calculation Manual (ODCM).

b.

For all other releases, dose projection shall be perfotaed.

I 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 documented on supplied worksheets and/or cceputer printout. Ensure that the date and time appear on all worksheets.

STEP 5: Discontit.te 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 CHECKLIST (Attachment 6).

]

REFERENCES 1.

Monticello Nuclear Generating Plant Emergency Plan 2.

Mout1 cello Nuclear Generating Plant Offsite Dose Calculations Manual 3.

NUREG-0654/ FEMA-REP-1, " Criteria for Preparation and Evaluation of Radiological Emergency Response Plans and Preparedness in Support of Nuclear Power Plants" ATTACEMENTS 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 Hand Calculation Based on FSAR Accident Analysis 5.

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

Example of Off-Site Dose Projection Checklist 7.

Determination of Meteorological Data Using Instrumentation Available in the Control Room EMPROC3G

Proccdura A.2-406 Rsvision 2 Page 5 cf.23 ATTACariENT 1 Page 1 of 4 DOSE PROJECTION BY COMPU"ER (MODCOM)

PREREQUISITES Move the LA-36 terminal from the Body Burden Analyzer Room as follows:

1.

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

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.

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 hFT Tower Data Terminal and the Plant Computer CRTs, if this has not alrea y been done. 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 "RUN 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 rer. pond with:

INITIAL EVALUATION ? :

EMPROC3G

Prec: dura A.2-4d6 g

Rtvisien.

1 Page 6 of 23 ATTACHMENT 1 (Cont'd.)

m Page 2 of 4 J

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" unles-this is the first post-release execution of tt.s 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 THE OPTION YOU DESIRED:

STEP 5: Select one of the follcwing options:

OPTION DESCRIPTION 1

PERFORM TYPICAL 15 MIN. DOSE RATE CALCULATION 4

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 portion 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 termin.il will respond by requesting that you enter current date information. 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 Attachment 7 of this procedure.

x EMPROC3G

Procedure A.2-406 Revision 2 Page 7 of 23 ATTACHMENT 1 (Cont'd.)

Page 3 of 4 and proceed to request specific numerical information. Obtain this information from the det Tower Data Terminal and type it in as requested. The terminal will respond with:

PLEASE ENTER THE FOLLOWING EFFLUENTS RELEASE RATE DATA:

and proceed to request specific numerical information. Obt.2in this information from the Plant Computer CRTs and type it in as requested.

b.

The terminal will respond with a printout of off-site dose projections for the affected sector (s) from the Site Boundary to a distance of 50 miles. Communicate this information to the Radiological Emergency Coordinator.

c.

The terminal will then print:

PLEASE ENTER THE OPTION YOU DESIRE:

d.

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

NOTE:

MET data is updated every 15 minutes and that should be the frequency with which Option 1 is run during an emergency condition with an airborne release. You should continue to update dose rate data every 15 minutes until the Radiological Emergency Coordinator directs other-wise.

STEP 7: LIST ACCUMULATED DOSES FOR ANY SECTOR a.

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

R ENTER THE SECTOR (A-R) FOR WHICH YOU WANT THE ACCUMLL\\TED DOSES REPORTED.

SECTOR:

b.

Type in the sector letter (A-R).

The terminal will respond with a printout of the accumulated doses for the affected sector from the Site Boundary to a distance of 50 miles. Communicate this information to the Radiological Emergency Coordinator.

c.

Ihr terminal will then print:

PLEASE ENTER THE OPTION YOU DESIRE:

EMPROC3G

Prccedura A.2-40'S

~

R visica 2 Page 8 of 23 ATTACHMENT 1 (Cont'd.)

Page 4 of 4

.)

d.

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

STEP 8: SEARCH ALL SECTORS l'OR HIGHEST 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.

Communicate this information to the Radiological Emergency Coordinator.

b.

The terminal will then print:

PLEASE EhTER THE OPTION YOU DESIRE:

c.

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

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

PLEASE ENTER THE OPTION YOU DESIRE:

)

Type in "8" and press carriage return. You may. subsequently re-enter th.e 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 STEP 4 of the main procedure.

l i

=

EMPROC3G

Practdura A.2-406 R:visten 2 Page 9 of 23 ATTACHMENT 2 Page 1 of 3 DOSE PROJECTION BY HAND CALCULATION EASED ON KNOWN RELEASE 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 (Attachment 3)

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

i STEP 2: Enter the TIME 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 in unavailable, an individual may be stationed at the meteorological tower to relay the infor-mation via the telephone (phone number 295-5108).

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

Record the class designation.

i l

c.

RE Vent Windspeed - Record the windspeed at the 33 feet level (use I mph when indication is zero).

d.

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

l e.

Stack Wind Direction - Record the wind direction at the 330 feet i

level.

(If value is greater than 360, subtract 360 before recording.)

l 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-23.

See Attachment 7 of this l

procedure.

EMPROC3G

..... _ ~

Procedure A.2-406 Revisiva 2 Page 10 of 23 f

ATTACHMENT 2 (Cont'd.)

Page 2 of 3 TABLE I Stability Class RB Vent (DT1/100)

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 -1.35 D

-0. 48 to --0.16

-1.34 to -0.45 E

-0.15 to *C.49

-0.44 to +1.35 F

+0.50 to 61.31

+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: Deter:nine 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 speed indicates zero, use Sector designation "L" (most critical sector based on nearest recep to r).

TABLE II t

Wind Direction (degrees from)

Sector If8.75 to 191.25 A

191.25 to 213.75 B

j 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 P

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 into sectors and contains the values for Stack releases and Vent releases to the Site Boundary and nearest receptor. Part two contains the values for other 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.)

EMPRCC3G

Procndure A.2-406 R; vision 2 l

Paga 11 of 23 l

ATTACHMENT 2 (Cont'd.)

l Page 3 of 3 STEP 6: From Table III, determine and record the Noble Gases 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-05 24.00 48.00 6t.10E-02 3.3'P 05 48.00 96.00 3.90E-02 4.345-05 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-02 5.87E-05 1440.00 Beyomd 3.60E-03 5.87E-05 STEP 7: Record the release rates (mci /sec) for the gas and iodine portions of the stack and vent effluents. The gas portion re} ease rates may be obtained directly from effluent monitor readings.

If direct monitor readings are unava11able, obtain release rates from procedure A.2-425 (Release Rate Det armination). 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 Site 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 calculated 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 from dose projection activities, return to STEP 4 of the main procedure.

1/.This factor is taken from EPA-520/1-75-001. The calculation is based assumption that the ratio of iodines to noble gases in the mixture available for release is 0.4.

EMPROC3G

I" Procedure A.2-40'6 Revision 2 Page 12 of 23 ATTACHMENT 3 Form 5190-406-1, Rev. O, 03/12/81 Page 1 of 2 i

Example of 0FF-SITE DOSE RATE PROJECTION WORKSHEET - KNOWN RELEASE RATE (For Use With Procedure A.2-406, Attachment 2)

INPUT DATA Time Date Time After Reactor Trip hours Stability Class: RB Vent Stack Windspeed:

kB Vent mph Stack mph Wind Direction:

Sector X/Q Values:

RB Ver' - dite Boundary (AA)

- Nearest Receptor (BB)

- LPZ Cuter Boundary (CC)

Stac! -

Site Boundary (DD)

Nearest Receptor (EE)

LPZ Outer Boundary (1 mile)

(FF)

Noble Gases Factor (GG)

Iodines Factor (HH)

Release Rates:

RB Vent - Gas (JJ)

(mci /sec)

- Iodines (KK)

St3ck -

Gas (LL)

Iodines (KM)

F0 MAT OF DATA FROM MET TOWER DAYTIME 33' 140' 330' 33' 140' 330' 33' DT1 DT2 DEW RAIN RN AC0F DV:

WS WS WS WD WD WD TEMP 140 330 PNT EMPROC3G

Practdura A.2-406 Revisica 2 Pega 13 of 23 ATTACHMENT 3 (Cont'd.)

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

CALCULATIONS 1.

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

Whole Body-mrem / hour HH x [(AA x KK) + (DD x MM)] =

Thyroid-arem/ hour (adult) 2.

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

Whole Body-stem / hour HH x [(BB x KK) + (EE x MM)] =

Thyroid-arem/ hour (adult) 3.

LPZ Outer Boundary (1 mile)

GG x [(CC x JJ) + (FF x LL)] =

Whole Body-aren/ hour HH x [(CC x KK) + (FF x MM)] =

Thyroid-arem/ hour (adult) 4.

Location of Interest RB Vent X/Q at Location of Interest (NN)

Stack X/Z at Location of Interest (PP)

GG x [(NN x JJ) + (PP x LL)] =

Whole Body-mrem / hour HH x [(NN x KK) + (PP x MM)] =

Thyroid-mrem /bour (adult) 5.

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)] =

Whole Body-mrem / hour HH x [(NN x KK) + (PP x MM)] =

Thyroid-mrem / hour (adult) 6.

Location of Interest RP Vent X/Q at Location of Interest (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 MM)] =

Thyroid-mrem / hour.

(adult)

REVIEW AND APPROVAL Completed by:

/

Date:

Reviewed by:

Date:

Rad. Emerg. Coordinator NOTE:

Af ter this checklist is completed and is not r equired for immediate use, it shall be placed in the appropriate container provided for Emergency Records.

EMPROC3G

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Prccrdura A.2-40'6 l

Rsvisica 2 l

Page 14 of 23 1

ATTACHMENT 4 Page 1 of 6 DOSE PROJECTION BY HAND CALCULATION BASED ON FSAR ACCIDENT ANALYSIS EQUIPMENT REQUIRED 1.

Calculator - if available 2.

Supply of 0F'!-SITE DOSE PROJECTION WORKSHEET - FSAR ACCIDENT ANALYSIS FORMS (TSC)

PROCEDL'RE 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 telephone (phone number 295-5108).

a.

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.

Record the class designation.

b.

Stack Windspeed - Record 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 sind 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 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)

A*

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 B (A not analyzed)

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

EMPROC3G J

Pr:c; dura A.2-406 Rzvisica 2 Paga 15 of 23 ATTACHMLNT 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 t

area directly downwind from the plant.

NOTE:

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

TABLE II Wind Direction Sector 168.75 to 191.25 A

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

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 P

123.75 to 146.25 Q

146.25 to 168.75 R

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 Radiclogical Emergency Coordinator to secure from dose projection activities, return to STEP 4 of the main procedure.

EMPROC3G

i l

Procedure A.2-406 Revision 2 Page 16 of 23 ATTACIDIENT 4 (Cont' M Page 3 of 6 TABLE III RADIOLOGICAL EFFECTS OF TIIE CONTROL ROD DROP ACCIDENT First 2-liour Dose Distance Miles G

F E

D C

B

-3 1/3 7.2 x 10' 4.8 x 10' 4.8 x 10-1.4 x 10" 4.8 x 10 1.5 x 10

-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 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

-3

-4

-0

~

~

10 6.2 x 10

4.4 x 10 1.7 x 10

8.6 x 10 4.2 x 10' 2.8 x 10

-5

-5

~

Lifetime Thyroid Dose (rem)

~9 1/3 a

a 3.4 x 10-1.7 x 10 9.4 x 10' 2.8 x 10

~

-5

-5

-5

-5 2.0 x 10' 7.4 x 10 2.0 x 10 5.6 x 10 2.2 x 10 1

a 9.8 x 10'0 3.6 x 10 1.4 x 10 1.2,x 10 5.0 x 10

-5

-5

-5

-6 3

a

-5

-5

-6

-0

-0 5

a 1.8 x 10 1.9 x 10 7.9 x 10 6.2 x 10 2.4 x 10 10 3.2 x 10'9 2.2 x 10 7.4 x 10 3.0 x 10 2.2 x 10 8.6 x 10

-5

-6

-6

~7 Total Dose Distaace Miles G

F E

D C

B Passing Cloud Whole Body Dose (rem)

~3

~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

-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 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

~

5 1.3 x 10 9.0 x 10 '

6.0 x 10

2.4 x 10" 1.6 x 10 ' 8.2 x 10-5

-3

~

~

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

-5

-5

-5

~

Lifetime Thyroid Dose (rem)

-6

~0 1/3 a

a 1.2 x 10 6.2 x 10' 3.4 x 10 1.0 x 10

~

-5 7.4 x 10' 2.8 x 10" 7.4 x 10' 2.0 x 10 8.2 x 10

~

1 a

-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

-3

-5

-5

-6 5

a 6.6 x 10 7.0 x 10 2.8 x 10 2.2 x 10 8.6 x 10

-5

-6

-6

-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 The symbol "a" means less than 1 x 10' EMPROC3G

~

Pr:csdura A.2-406 RIvisien 2 Pege 17 of 23 ATTACHME;'T 4 (Cont'd. )

Page 4 of 6 TABLE IV RADIOLOGICAL EFFECTS OF THE LOSS OF COOLANT ACCIDENT First 2-Hour Dose Distance Miles G

-F E

D C

B Passing Cloud khole Body Dose (rem)

-5

-5 1/3 1.7 x 10 1.1 x 10 1.1 x 10-5 3.4 x 10-6

-5

-6 1.1 x 10 3.8 x 10

-5

-6

-6

~0

-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

~0

~0

~0

-7

~7 3

4.8 x 10 3.0 x 10 2.8 x 10 1.0 x 10'0 8.8 x 10 4.0 x 10

-6

-6

-6

~7

~7

~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

-0

-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 Dose (Rem)

-0

~7 4.4 x 10 '

~

1/3 a

a a

1.3 x 10 4.0 x 10

~9

-6

-7

-7 1

a 2.8 x 10 1.0 x 10 2.8 x 10 8.2 x 10" 3.4 x 10

-7

-7

-7

-7

-8 5

a 1.3 x 10 5.2 x 10 2.0 x 10 1.8 x 10 7.0 x 10

-8

~

5 a

2.4 x 10 2.6 x 10-1.1 x 10' 8.6'x 10' 3.2 x 10

-9

~7

-8

-8 10 4.4 x 10 3.0 x 10~

1.0 x 10 4.2 x 10" 3.2 x 10 1.1 x 10 Total Dose Distance Miles G

F E

D C

B Passing Cloud ktole Body Dose (Rem) 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 '

-4

~0

~

~

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

-5

~

~

3 1.v x 10 ' 9.6 x 10 1.0 x 10 '

3.6 x 10 3.2 x 10 1.3 x 10

-5

-5

-5

-5 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

-5

-6

~

-5

-5

-5

-6

-0

-6 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

~7

-5

-5

-5

-5 1

a 1.1 x 10 4.2 x '0 1.1 x 10 3.2 x 10 1.3 x 10

-6

-5

-6

-6

~0 3

a 5.2 x 10 2.0 x 10 8.6 x 10 7.0 x 10 2.8 x 10

-5

-5

~0

~0

-6 5

a 1.0 x 10 1.0 x 10 4.4 x 10 3.4 x 10 1.3 x 10 10 1.7 x 10 1.1 x 10 4.0 x 10'0 1.6 x 10 1.2 x 10 4.6 x 10"

~9

-5

~0

~0

-10 The symbol "a" means less than 1.x 10 EMPROC3G s

~'

Pr:ccduro A.2-40'6 Revision 2 Page 18 of 23 ATTACIDfENT 4 (Cont'd.)

Page 5 of 6 TABLE V RADIOLOGICAL EFFECTS OF THE REFUELING ACCIDENT First 2-Hour Dose Dist.nce Miles G

F E

D C

B Passing Cloud khole Body Dose (rem) 1/3 1.4 x 10 9.8 x 10

1.0 x 10 3.0 x 10 ' 9.8 x 10 3.2 x 10 '

-3

-0

~

~

~

I 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

-4

-4

-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

-5

-0

-6~

10 1.3 x 10 8.8 x 10 3.6 x 10 1.7 x 10 8.8 x 10 5.6 x 10 Lifetime Thyroid Dose (rem)

-6

-8 1/3 a

a 2.2 x 10 1.0 x 10 6.0 x 10 1.7 x 10 1 a

1.3 x 10 4.8 x 10 1.2 x 10

3.6 x 10 1.4 x 10~4

-5

~4 3

a 6.2 x 10 3.2 x 10 9.4 x 10-5 8.2 x 10-5

~

3.2 x 10 1.1 x 10

1.2 x 10

5.0 x 17 4.0'x 10 1.4 x 10 5

-5 5 a

~0

-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) 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

-3

~3

~3

-3

-3

-3

-3

-3

~4 1

4.4 x 10 2.4 x 10 2.8 x 10 1.0 x 10 1.6 x 10 6.6 x 10 3

1.9 x 10

-1.2 x IC-1.2 x 10 4.2 x 10' 3.6 x 10 1.6 x'10~4

~3

-3 5

1.2 x 10 8.2 x 10

5.6 x 10 2.2 x 10 '

1.5 x 10 7.6 x 10

-3

-4

~

-5 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

-5

~

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

-3'

-3

~

1 a

8.4 x 10 3.0'x 10 8.4 x 10 2.4 x 10 9.2 x 10

~

4.0 x 10

1.5 x 10 6.0 x 10 ' 5.2 x 10 2.0 x 10-0

-3

~

3 a

5 a

7.4 x 10 7.8 x 10 3.2 x 10 2.6 x 10 9.6 x 10-5

-4 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

-3

-5 The symbol "a" means less.than 1 x 10" EPPROC3G

Prac: dura A.2-406 Rsvicien 2 Pega 19 of 23 ATTACHMENT 4 (Cont'd.)

Page 6 of 6 TABLE VI RADIOLOGICAL EFFECTS OF STEAM LIKE BREAK ACCIDENT (TOTAL DOSE)

Distance Miles G

F E

D C

B Passing Cloud Whole Body Dose (rem)

~3

-3

~3

-4

~3

~0 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

-3

-3 3

3.6 x 10 ' 4.5 x 10 ' 1.2 x 10~0 1

3.0 x 10 2.8 x 10 3,9, jf

~

~

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

-3

-3

-5

-5

-5

~

5 9.8 x 10 " 7.4 x 10 '

2.1 x 10 '

4.5 x 10 2.4 x 10 8.2 x 10

-5

-5

-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

-5

-5

~0

-6

~

Lifetime Thyroid Dose (rem)

~3 0

0

~I

~I 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"I

-2 0

~I

~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 3

9.9 x 10 3.8 x 10 7.3 x 10 2.2 x 10 1.2 x 10-2 3.1 x 10-3

-1

~I

-2

-3

-3

-3 5

1.4 x 10 2.0 x IO 2.9 x 10 9.0 x 10 4.7 x 10 1.2 x 10

~I

-2

-3

-3

~3 10 1.3 x IO 7.6 x 10 8.4 x 10 2.6 x 10 1.3 x 10 3.4 x 10

EMPROC3G

~

~,-.._.

Procedure A.2-406 Rzvision 2 Page 20 of 23 ATTACHMENT 5 Form 5790+406-2, Rev. O, 03/12/81 Page 1 of 2 Example of 0FF-SITE DOSE PROJECTION WORKSHEET-FSAR ACCIDENT ANALYSIS (For Use With Procedure A.2-406, Attachment 4)

DATA Time Date Stack Windspeed sph x 0.447 =

m/s Stack Stability Class Wind Direction Affected Sector (s)

DOSE PROJECTIONS From Table:

WHOLE BODY DOSE Distance First 2 Hour Total Miles Dose (Rem)

Dose (Rem) 1/3 1

3-5 10 F

e EMPROC3G

Precadura A.2-406 f

Rzvisien 2 Page 21 of 23 ATTACHMENT 5 (Cont'd.)

Form 5790-406-2, Rev. O, 03/12/81 Page 2 of 2 Example of

[

OFF-SITE DOSE PROJECTION WORKSHEET - FSAR ACCIDENT ANALYSIS (Cont'd.)

LIFETIME THYROID DOSE Distance First 2 Hour Total Miles Dose (Rem)

Dose (Rem) 1/3 1

3 5

10

.EVIEW AND APPROVAL Completed by:

/

Date:

Reviewed by: Rad. Emerg. Coord.

Date:

NOTE:

Af ter this checklist is completed and is not required for immediate use, it shall be placed in the appropriate container provided for Emergency Records.

4 EMPROC3G

~~

Procsdure A.2-506 Ravision 2 Page 22 of 23 ATTACHMENT 6

\\

Form 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 Date 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 RecorIs.

EMPROC3G

_ - _ - _ _ - - - _ _ - _ _ _ - - _ _ _ _ _ = _ _ -

Pr:c: dura A.2-406 R:visica 2 Peg 2 23 of 23 ATTACHMENT 7 Determination of Meteorological Data Using Instrumentation Available In The Control Room In the event the Met Iower data is not available, either from the printer at I

the TSC, or from the recorders at the Met Tower, the wind speed, wind direction and stability class can be determined frve the instrumentation in the Control Room.

In this event, only one set of data (speed, direction and stabilicy) is available, and is to be used for both reactor building vent 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 observation.

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 swite' n set at 15.

b. Verify the SYNCHRO-DC switch is set at 0-100.

c. Verify the A/C - D/C switch of the Fluke Multimeter is in the DC position (pushbutton out).

j

d. Verify the 2 V range is selected.

e. Turn the power switch of the Fluke 8020A Multimeter to ON (green switch on left side of instrument).

f. Read the scale of the multimeter (units are V).

g. Determine the stability class by using the following table:

Multimeter Reading Stability Class

} 1.12 V ------------------------------------

A (Extremely unstable) NOTE 1

( 1.12 V to }.88 V -------------------------

B (Moderately unstable)

(

.88 V to >.62 V -------------------------

C (Slightly unstable)

(

.62 V to 5.38 V -------------------------

D (Neutral)

(

.38 V to 5.19 V -------------------------

E (Slightly stable)

(

.19 V to 2 10 V -------------------------

F (Moderately stable)

Less than.10 V -----------------------------

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 I

from certified consulting meteorologist to Bert Clark).

h. When Met Tower data is no longer required, turn the multimeter power switch to 0FF.

EMPROC3G

_ _ _ _ - _ _ _ _ _ _ _ _ _ _ - _ _ - _ _ _ _ -.