Text

PC-03 to Procedure/Work Plan 1904-002, Offsite Dose Projections Rdacs Computer Method
	ML20206J802
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Site:	Arkansas Nuclear
Issue date:	05/04/1999
From:	; ENTERGY OPERATIONS, INC.
To:	;
References
	1904.002, NUDOCS 9905120340
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l Arkansas Nuclear One - Administrative Senices Document Control Tuesday, May 04,1999 Document Update Notification COPYHOLDER NO: I03 TO: NRC - WASIIINGTON i

< ADDRESS: DOC CNTRL DESK MAIL STOP OPI-17 l WASHINGTON DC 20555 DOCUMENTNO: OP-1904.002 1 I

77TLE: OFFSITE DOSE PROJECTION RDACS COMPUTER METIIOD REVISION NO: 028-03-0 CHANGE NO: PC-03

SUBJECT:

PERMANENT CHANGE (PC)

D -

If this box is checked, please sign, date, and return transmittal in envelope provided.

ANO-1 Docket 50-313 ANO-2 Docket 50-368 Signature Date 9j5iMk $ 3

ENTERGY OPERATIONS INCORPORATED ARKANSAS NUCLEAR ONE 57 of 68 PROC / WORK PLAN NO. CHANGE NO.

TITLE: OFFSITE DOSE PROJECTIONS RDACS moo 2 028-03-0 COMPUTER METHOD WORK PLAN EXP. DATE TC EXP. DATE n/a n/a SAFETY RELATED IPTE SET # / .

_@YES ONO OYES SNO

/ TEMP ALT OYES ONO When you see the TRAF use the TOOL.S//

Time Pressure Self Check ,

Distraction / interruption Peer Check l l

Multiple Tasks 3-Part Communication Over Confidence Pre-Evolution Briefs l Vague or Interpretive Guidance Knowledge )

First Shift /Last Shift Placekeeping Peer Pressure STAR Change /Off Normal Procedures j Physical Environment Mental Stress (Home or Work)

DATE TIME VERIFIED BY 1

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FORM NO. CHANGE NO.

FORM TITLE:

1000.006A 047-02 4 l VERIFICATION COVER SHEET l

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ENTERGY OPERATIONS INCORPORATED ARKANSAS NUCLEAR ONE O 59 of 68 ;

V CHANGE NO.

PROC / WORK PLAN NO.

TITLE:OFFSITE DOSE PROJECTlONS RDACS 1m.002 028-03-0 COMPUTER METHOD OWORK PLAN, EXP. DATE_ N/A PAGE 1 - OF 1 EPROCEDURE TYPE OF CHANGE:

O NEW O REVISION @ PC O Tc O DELETION O EZ EXP. DATE:

Procedure or Work Plan DESCRIPTION OF CHANGE: (For each change made, indude sufficient detail to describe AFFECTED SECTION:

(include step # if reason for the change.)

applicable) 9.2.2.A.1 Deleted steps 9.2.2.A.1 b-g. Added "b. Forecast data can be obtalned on-line via the ANO Net and the Worid WKle Web. See RDACS desk guide for instructions". Changed step h to step c.

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/' FORM NO. CHANGE NO.

h FORM TITLE:

DESCRIPTION OF CHANGE 1000.006C 047-02-0

PROCEDURE / WORK PLAN TITLE: PAGE: 1 of 51 PROC / WORK PLAN NO.

1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 028010 m

\_, TABLE OF CONTENTS PAGE NO.

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._ECT ION

............................. .... .............. 3 1.0 PURPOSE...........

2.0 SCOPE.................. .............. ........ ..... ............ .3 3

3.0 DESCRIPTION

....................... ........ ... 4

4.0 REFERENCES

.............. ... .. ............. 5 5.0 DEFINITIONS....................

.... .......... 6 6.0 RESPONSIBILITY AND AUTHORITY........................

7 7.0 LIMITS AND PRECAUTIONS..... ........ ......... ................ ....

........................ 9 8.0 RDACS MENU STRUCTURE..... ..... ...........

.... .... ........ . .. .......... ....... . 13 9.0 INSTRUCTIONS. ... ..

9.1 RDACS Operations - Auto Mode ... ......... ...... ... .. 13 9.1.1 Control Room - Initial Dose Assessment.......... 13 9.1.2 Emergency Operations Facility - Dose Assessment Team., ...... .... . ....... ....... ..... ... 17

(T 9.2 RDACS Operations - Forecasting . .. . ... ..... ...... .... 20 b 9.2.1 Obtaining a Site Release Rate Forecast. .... . 20 9.2.2 Meteorological Forecasting................ ... . 21 9.2.3 Dose Forecast Processing. .... ... . ..... ..... 23 9.3 RDACS Operations - Backup Mode ....... . . ................ 25 9.4 Determination of Current Release Rate and Meteorological Conditions ........ .... .. ... . ............... . .... 32 9.5 Status Change Reports ..................................... 34 9.6 Editing for Unmonitored Releases ........ ..... ..... .... 36 9.7 Centerline Dose Rate Adjustments for Field Dath- Scale Factors ................................. .. ......... .... 36 9.8 Isotopic Distribution Changes .......... ...... ... ....... 37 9.9 Data Trending ..... ... ..... ...... .......... ........ 38 9.10 Obtaining RDACS Data from the Alternate EOF ...... .... ... 40 v

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.. ............ ................. . 41 V 10.0 ATTACHMENTS AND FORMS..........

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10.1 ATTACHMENTS 10.1.1 Attachment 1 - Typical Stability Classes by Date, Time, and Cloud Cover..................... 42 I i

10.1.2 Attachment 2 - RDACS System Configuration....... 43 l 10.1.3 Attachment 3 - Sigma Theta / Stability Class -

Comparison................... .................. 44 i

i 10.1.4 Attachment 4 - Dose Assessor's Quick Reference Backup Mode.............. ...................... 45 10.2 FORMS 10.2.1 Form 1904.002A - Plume Update Parameters / Meteorology Worksheet... ....... .... 47 10.2.2 Form 1904.002B - Plume Update '

Parameters / Release worksheet.. . ... ....... . 48 10.2.3 Form 1904.002D Dose Scale Factor Worksheet . . . . 49 10.2.4 Form 1904.002E - Forecasting Worksheet.......... 50 10.2.5 Form 1904.002F - Isotopic Distribution Documentation Worksheet......................... 51 C

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CHANGE: 028-03-0 1.0 PURPOSE The purpose of this procedure is to provide an initial estimate of the radiological conditions at the ANO Exclusion Area Boundary, provide information to determine the Emergency Action Level for subsequent classification into one of the four Emergency Classes, define the offsite area (s) potentially affected by an airborne radiological release, provide an estimate of the Total Effective Dose Equivalent (TEDE), Child Thyroid dose rates, formulate of fsite radiological Protective Action Recommendations (PARS) and refine projections based on available field monitoring data using the Radiological Dose Assessment Computer System (RDACS) .

2.0 SCOPE 2.1 This procedure describes the use of RDACS in three (3) different operating modes: auto mode, backup mode and forecast mode.

2.2 This procedure is applicable to airborne radioactive releases from ANO as indicated by the ANO Super Particulate Iodine Noble Gas (SPING) monitors or by other radiological monitoring devices used to assess unmonitored releases (e.g., Steam Line Monitors).

2.3 If releaaes are occurring from steam vents or from an unmonitored release point, release rates must be determined using Procedure 1904.004, " Estimating Airborne Release Rates".

3.0 DESCRIPTION

The RDACS is a network system which obtains and relays information to a series of computer terminals (nodes) located in the Unit One and Unit Two Control

.s Rooms, the (Technical support Center (TSC)] and the Emergency Operations Facility (EOF). The Control Room RDACS computers are continuously powered-up and will alarm whenever identified limits are excaeded (eee section 9.1.1.B).

The RDACS is a redundant system composed of two " File Servers", designated as "A" and "B", which continuously accept radiological release data from the eleven (11) ANO SPINGS and meteorological data from the meteorological tower i via the Safety Parameter Display System (SPDS). If at any time one of the two {

file servers fail, the alternate file server assumes the lead for collecting >

and distributing data to the various nodes without any data loss or interruptions.

The file server distributes accumulated information If both file servers becometoinoperable the variousfornodes any via a l Local Area Network (LAN).

reason, the user will then use the RDACS in its backup mode. The backup mode will require manual entry of SPING and meteorological data. If the LAN i becomes inoperable, radiological and meteorological data may still be available to the nodes located in the Control Rooms. If the file server is lost, meteorological data will be available via the Unit One Control Room meteorological strip charts or through information obtained from the Corps or Engineers or Russellville Airport and the use of Procedure 1904.005,

" Atmospheric Stability Class Determination", and radiological data may be obtained using Procedure 1904.004, " Estimating Airborne Release Rates". ;

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4.0 REFERENCES

4.1 REFERENCES

USED IN PROCEDURE PREPARATION:

4.1.1 Emergency Plan 4.1.2 EPA-400, " Manual of Protective Action Guides and Protective Actions for Nuclear Incidents" 4.1.3 "Offsite Dose Calculation Manual" (ODCM) 4.1.4 Title 10, Code of Federal Regulations, Part 20 (10CFR20) 4.1.5 Methodology Manual, Emergency Dose Calculation Package, EDC/ 6600, Rev. O, October 1982, Applied Physical Technology, Inc.

4.1.6 " Workbook of Atmospheric Dispersion Estimates", D. Bruce Turner, 1970.

4.1.7 " Meteorology and Atomic Energy", U.S. Atomic Energy Commission, D.H. Slate, July 1968.

4.1.8 " Arkansas Nuclear One Evacuation Time Study", ANO Emergency Plan, Appendix 5.

4.1.9 OCNA048710 O

4.2 REFERENCES

USED IN CONJUNCTION WITH THIS PROCEDURE:

d 4.2.1 1904.004, " Estimating Airborne Relaase Rates" 4.2.2 1904.005, " Atmospheric Stability Class Determination" 4.2.3 1904.010, " Duties of the Initial Dose Assessor" 4.2.4 1904.011, " Duties of the Dose Assessment Team" 4.3 RELATED ANO PROCEDURES:

4.3.1 1604.051, "Eberline Radiation Monitoring System

4.3.2 1903.010, " Emergency Action Level Classification" 4.3.3 1903.011, " Emergency Response / Notifications" 4.4 REGULATORY CORRESPONDENCE CONTAINING NRC COMMITMENTS WHICH ARE IMPLEMENTED IN THE PROCEDURE: [ BOLD] DENOTES COMMITMENTS.

4.4.1 OCAN048704, Section 9.1, 9.2 and 9.3 4.4.2 OCNA048609, Section 9.7 4.4.3 OCANO38313, Section 9.1, 9.2 and 9.3 v

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,s 4.4.4 OCNA018411, Section 9.1, 9.2 and 9.3 4.4.5 0CAN079009, Section 3.0 and Attachment 2 4.4.6 0CAN128012, Section 9.2.2 5.0 DEFINITIONS 5.1 Radiological Dose Assessment Computer System (RDACS) - The primary and secondary data processing system used for dose assessment calculations. This system consists of two redundant file servers, a local area network and multiple nodes.

5.2 File Server - One of two redundant computers located in the SPDS room which collect radiological and meteorological data, process and store this data, and transmit this data to the requesting nodes.

5.3 Local Area Network (LAN) - The communications system which allows processed data from the file server to be transferred to any node.

5.4 Node - The terminals connected to the LAN that the user interfaces with to perform dose assessment functions.

5.5 SPING - One of the eleven Eberline radiological air monitoring detectors connected to RDACS. Each SPING monitors a single physical release point for airborne particulates, iodines, and noble gases.

5.6 Continuous Monitor File (CMF) - The files which contain raw meteorological and radiological data. The RDACS has three continuous

[h monitor files; one for 2 mir.ute data, one for 10 minute data, and one

(,,/ The 2 minute file is 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months long, the 10 for hourly averaged data.

minute file.is 15 days long and the 60 minute file is 60 days long.

5.7 Auto Mode - The RDACS mode of operation in which the file server requests data from the SPINGS and meteorological tower, processes this data, transmits the processed data via the LAN to the requesting node from which the node can either display or print this processed data.

5.8 Backup Mode - The RDACS mode of operation in which current processed data is unavailable from the file servers. Previous data will be stored on the node of operation if the user has requested a plume update from the system before the failure. In backup mode, current data must be gathered from alternate data sources, entered into the model, the model executed and the resultant data either displayed or printed.

5.9 Forecast Mode - The RDACS mode of operation in which all previous data segments can be updated to the working node, forecasted radiological and meteorological data are entered, processed and printed such that based upon estimates of future conditions, appropriate actions can be taken.

5.10 o0(sigma theta) - The standard deviation (net change) of the horizontal wind direction over time.

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^s) 5.11 At (delta t) - The vertical temperature differential between the upper and lower temperature sensors on the meteorological tower (in degrees Celsius).

(at a 5.12 X/Q - Thelocation) specific ratio of the concentration to the of radioactive release rate material (at the origin) in units of pCi/cc/C1/sec which is equivalent to units of secs /m8, 5.13 $> - Brackets represent a labeled computer button.

5.14 Dose Evaluation Points - Eighty (80) different points within the 10-mile EPZ for which RDACS calculates off-axis dose rates and cumulative doses.

Cumulative radiological doses 5.15 Protective Action Guideline (PAG) -

which the U.S. Environmental Protective Agency considers sufficiently hazardous to the health of the general public to warrant widespread protective actions, such as evacuation.

5.16 Protective Action Recommendation (PAR) - Recommended precautionary actions issued to offsite authorities which are based on radiological release data.

Greenwich Mean Time (GMT) - The standard time in Greenwich, England.

5.17 Most international weather data is listed in GMT, and is designated by the suffix 'Z'. Convert Greenwich Mean Time to Central Standard Time by subtracting 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months (or add 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months to convert CST to GMT).

Subtract 5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months to convert from GMT to Central Daylight Saving Time.

6.0 RESPONSIBILITY AND AUTHORITY 6.1 SHIFT SUPERINTENDENT 6.1.1 Responsible for determining if an unplanned gaseous release to the environment is indicated by symptoms such as SPING monitor readings, area radiation monitor alarms or other indications.

6.1.2 Responsible for ensuring that offsite dose projections are performed until relieved by the Dose Assessment Supervisor and for supplying backup meteorological data and "unmonitored release" data to the Dose Assessment Team, as necessary, throughout the incident.

6.1.3 Whenever the Shift Superintendent is responsible for Emergency Direction and Control, he shall review and approve Protective Action Recommendations and ensure that these recommendations are communicated to the appropriate offsite authorities.

6.1.4 Responsible for obtaining current meteorological data for use in completing offsite dose calculations until relieved by the Dose Assessment Supervisor.

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( 6.2 DOSE ASSESSMENT SUPERVISOR (DAS) 6.2.1 Once dose assessment has been assumed by the EOF staff, the Dose Assessment Supervisor is responsible for tracking offsite doses, gathering forecasts and formulating Protective Action Recommendations (PARS). PARS generated by the Dose Assessment Team are then forwarded to the Radiological / Environmental Assessment Manager (REAM).

6.2.2 The DAS is responsible for the direction of the Dose Assessment Team including the order in which the steps of Procedure 1904.002 are implemented based upon actual event conditions.

6.2.3 Responsible for obtaining current and forecasted meteorological data for use in preparing offsite dose forecasts once the Dose Assessment Team has been established.

6.3 RADIOLOGICAL /ENVIRONMEh'TAL ASSESSMENT MANAGER (REAM) 6.3.1 The REAM is responsible for reviewing dose forecasts and selected PARS and forwarding appropriate PARS to the TSC Director / EOF Director for notification to offsite authorities.

6.4 TSC DIRECTOR

/* 6.4.1 Whenever the TSC Director is responsible for Emergency

( Direction and Control, he shall review and approve Protective Action Recommendations forwarded to him by the REAM. He shall also ensure that these recommendations are communicated to the appropriate offsite authorities.

6.5 EOF DIRECTOR 6.5.1 Whenever the EOF Director is responsible for Emergency Direction and Control, he shall review and approve Protective Action Recommendations forwarded to him by the REAM. He shall also ensure that these recommendations are communicated to the appropriate offsite authorities.

7.0 LIMITS AND PRECAUTIONS 7.1 This procedure describes only limited routine and emergency use of the RDACS computers. A wide range of additional capabilities are available. However, the occasional user should not attempt to use programs and commands which are not specifically described in this procedure.

7,2 This procedure provides a projection of the radiological conditions based upon measured release rates and meteorology; field monitoring is necessary to determine _the actual conditions.

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O 7.3 Actual terrain and weather conditions ( e.g., precipitation) will generally limit the accuracy of the' projected doses at a specific location.

7.4 The Emergency Dose Calculation (EDC) data files are circular in nature. When the last available new segment has been used, the next plume segment will write over the location of the first plume segment.

7.5 Following an actual event or drill / exercise in which the normal isotopic mix has been altered, the user shall re-enter the original values.

7.6 Once the user has begun processing plume updates in the RDACS backup mode, the RDACS system does not allow for the transfer of plume update information to the RDACS Auto Mode if it becomes available.

7.7 Whenever unmonitored releases, SPING data, isotopic distribution or scale factors are edited while in Auto Mode, these changes will edit values in the file servers and thus affect all RDACS nodes.

7.8 Messages acknowledged by the user from a particular RDACS termina'l will not clear the displayed message on other RDACS terminals.

7.9 If any additional software has been added to the RDACS file servers i and a particular node has not been turned on since that addition, the node being logged on will pause temporarily to load the most current !

software. An update box will appear on the screen during this process and will disappear once the update is complete. No user interaction will be required.

7.10 Protective Action Recommendations (PARS) formulated through the use of I this procedure are based solely on radiological release data.

Additional PARS are formulated by other sections of the Emergency Response Organization which are based on onsite plant conditions.

7.11 Calculations in this procedure are conservative; however, actual offsite doses and decision times may be higher or lower, and new recommendations should be considered whenever updated information becomes available.

7.12 If field data measurements are available prior to projected RDACS information, PARS may be developed using centerline field data. )

7.13 In order to print from the Unit Two Control Room RDACS terminal, it is necessary to insure that the printer control switch located adjacent to RDACS is in the correct position. For RDACS use the A/B switch should be in the "B" position labeled *RDACS PC'.

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8.0 RDACS MENU STRUCTURE 8.1 General Menu Description 8.1.1 The RDACS computers are menu driven. Each menu selection has additional submenus. Menu options may be obtained in one of two ways:

A. Enter the number of the option on the keyboard.

NOTE Menus with 9 or fewer options can be selected by pressing the corresponding number. For menus with more than 9 options, you would select both digits (i.e., option 10 would be selected by entering 1 and 0 and then < ENTER > while option 1 would be entered by simply depressing 1.

B. Use the cursor keys to highlight the chosen option followed by < ENTER >.

8.1.2 Each screen has a user system block at the bottom of the screen which defines the keys that can be used for option selection. The user should refer to this user system block for the appropriate key selection choices when using a particular screen.

8.. l . 3 When RDACS is brought up from a powered-off state, a menu will appear which will ask you to " Choose Operating

\w / Environment". From this menu, you have two options:

A. Online Live Mode - this option is used to select current real-time data.

B. Offline Drill Mode - this option is used to select data currently stored in files for use in drills and exercises.

8.1.4 Gaseous Effluent Munitor - Main Menu A. RDACS Subsystem - this option is used to view any processed plume segment and print all associated plume data.

B. SPING Subsystem - this option is used to manipulate and control the SPING(s) and associated SPING parameters.

C. System Status - this option is used to view the SPING and met tower parameters. Parameters may be viewed for a 15 second, 2 minute average or 10 minute average duration.

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PROCJWORK PLAN NO. PROCEDURE / WORK PLAN TTTLE: PAGE: 10 of 51 1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 02S434 D. Status _ Change Report - this option is used to view informttion caused by a SPING/ meteorological status change and to allow the user to edit release / meteorological parameters. This report is updated whenever status changes occur.

E. EAL Report - this option is used to view / print the most recent site boundary dose inf ormation and associated Emergency Class. The user may also view previous EAL Reports. This report is generated and updated every 2 minutes once release limits have been exceeded.

F. Data Display - this option is used to view and trend current and/or historical data from the SPINGS and meteorological tower.

G. Alarm _ Log Viewer - this option is used to view and acknowledge any alarm on the system.

H. Data Acquisition Maintenance - this option is used to edit the release rates for releases from SPINGs that have failed. This editing is normally done from the Status Change Report screen whenever failures have occurred during Emergency Dose Calculation (EDC) processing.

I. ERDS Subsystem - This menu is used to send key operational data to the NRC whenever an Alert or

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higher emergency class has been declared. This option is only operational on selected RDAOS terminals (e.g.

Control Room).

8.1.5 RDACS Subsystem Main Menu A. Initialize RDACS - this option is used to initialize all system files in the event you have no live data from the SPINGS or meteorological tower, the RDACS file servers are out of service, or the Local Area Network is not operational. This option can only be used in backup and forecast modes.

B. Enter Plume Update - this option is used to enter current or f orecasted data into the model .

1. Update Parameters & Meteorology - this option is used in backup and forecast modes to enter current or forecasted meteorological data.

2. Releases from Monitored Points - this option is used in backup and forecast modes to enter current or forecasted radiological data from monitored release points.

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3. Releases from Unmonitored Points - this option is used in auto, backup and forecast modes to enter 1 1

current or forecasted radiological data from I

unmonitored release points.

4. Dose Scale Factors - this option is used in auto, backup and forecast modes to enter the current correction factors for matching the models projected data to the actual data measured in the .

j field.

5. Isotopic Distributions - this option is used in j auto, backup and forecast modes to enter the 4 current isotopic distribution determined by I sampling an active release point.

6. Revise Model Constants - Item not active.

7. Execute Model - this option is used in backup and forecast modes to process manually entered data.

C. Display Plume Data - this option is used to view on the screen data processed for each plume segment.

1. Emergency Cla.ss - this option is used to view the current emergency class calculated by the model after processing is complete.

2. Plume Segment Data - this option is used to view

(% the current plume characteristics and parameters for drawing the plume on a ten mile EPZ map.

3. Plume Centerline Data - this option is used to '

view the centerline dose values for a variety of distances down the centerline of the plume.

4. Dose Evaluation Points - this option is used to view data calculated at the dose evaluation points for Total Effective Dose Equivalent (TEDE) dose rate, TEDE cumulative dose, Child Thyroid dose rate and Child Thyroid cumulative dose.

5. Plume Update Input - this option is used to view meteorological, radiological, scale factor and isotopic distribution data for the current plume segment.

D. Print Plume Data - select this option to print data processed for each plume segment.

1. Routine Reports (prints 2-7) - this op' tion is used to print the entire report for a projected or forecasted plume update.

2. Emergency Class - this option is used to print the current emergency class calculated by the model after processing is complete.

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t* 3. Plume Segment - this option is used to print the current plume characteristics and parameters for drawing the plume on a ten-mile EPZ map.

4. Plume Centerline - this option is used to print the centerline dose values for a variety of distances down the centerline of the plume.

5. Dose Evaluation Points - this option is used to print data calculated at the dose evaluation points for TEDE dose rate, TEDE cumulative dose, Child Thyroid dose rate and Child Thyroid cumulative dose.

6. Plume Parameters and Meteorology - this option is used to print meteorological data used for a particular plume segment.

7. Release Rates - this option is used to print radiological data used for a particular plume segment.

8. Oose Scale Factors and Isotopic Distributions -

this option is used to print the current dose scale factor information as well as isotopic distribution information for each release point.

E. Protective Action Recommendation - This option allows the RDACS user to calculate a protective action based O on dose rate and meteorological information.

Accept New Update - This option allows the user to F.

accept calculated plume data from the file server in response to a "New Update Available" message.

G. Draw Plume Map - This option allows the user to view a displayed 1, 10 or 50-mile EPZ map showing the projected position of a radioactive plume along with dose data and the derived emergency class.

H. Switch Operating Modes - This option allows the user to switch from one operating mode to another and transfers a user specified number of updates from the current mode of operation to the specified mode of operation.

I. Terminate an Event - This option is used by the Emergency Planning / Computer Support groups to terminate an event once a release has stopped and conditions are favorable to do so (i.e., possible duplication to a backup data source).

J. RDACS/ Field Data Comparison Sheet - This option prints the most recent RDACS update centerline dose rates to allow the user to log and compare with field team dose rate information. This report also provides a ratio of the RDACS TEDE dose rates to Whole Body Gamma dose rates.

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\ 9.0 INSTRUCTIONS 9.1 RDACS OPERATIONS - AUTO MODE NOTE Sections 9.1 describes unmonitored the use of RDACS in the Auto Mode with no additional release, loss of SPING). Refer to problems noted (i.e.,

additional sections within Section 9.0 to perform other functions as necessary.

If the Auto Mode fails prior to or during any plume processing, refer to Section 9.3 If while you are in AUTO Mode, an unmonitored release is detected, go to Section 9.3 9.1.1 Control Room - Initial Dose Assessment A. The RDACS continuously monitors meteorological and SPING data at ANO. The Control Rooms (Ul/U2) terminals may be used at any time to display SPING status for any of the 11 SPINGS. To observe the current SPING status and radiological parameters, the user must select Option 3, " System Status", from the Gaseous Effluent Monitor Main Menu.

NOTE g- Gaseous effluent limits now resida in the ODCM. The ' Tech. Spec. Limit i'

Exe'd" message in RDACS will not reflect this change until the software change has been completed.

B. Under normal conditions, the RDACS terminal in the control Rooto will be displaying either the Gaseous Effluent Monitor Main Menu or the System Status display. The Control Room terminals have been designed to audibly alarm and flash an alarm message whenever any of the following conditions are met:

1. Tech Spec Limit Exe'd - Alarm Log Entry Generated

a. SPING indicates measured levels above the alarm / trip setpoint

b. Power to a SPING is lost

c. SPING indicates downscale failure

d. SPING controls are not set on the operate mode.

2. EAL Report Generated Site total dose rates are nearing or exceeding emergency classification limits.

3. New Update Available Emergency Dose Calculations are complete and an

-((',} RDACS Report and plume map may be accepted.

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4. Sustained WS > 50 MPH. Review Procedure 1903.010

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Ten minute averaged wind speeds exceed 50 MPH.

Review 1903.010 for applicable Emergency Action Level Classification, if.any.

C. Under normal conditions, Operations personnel in the Control Room will respond to " Tech Spec Limit Exe'd*

alarms by selecting Option 7, " Alam Log viewer", from the Gaseous Effluent Monitor Main Menu and the <FS),

" Acknowledge Key" to silence the alarm.

D. Whenever a release setpoint is exceeded, a message, will be shown on the top of the screen. Under these conditions, Nuclear Chemistry personnel will be called to begin a dose assessment review.

E. If a " Tech Spec Limit Exe'd* message / alarm has not been silenced by Operations when you arrive at the Control Room RDACS terminal, select Option 7, " Alarm Log Viewer", from the Gaseous Effluent Monitor Main Menu and depress the <F8>, " Acknowledge Key". For "EAL Report Generated" messages, proceed to the next step below.

F. For "EAL Report Generated" messages, select Option 5, ,

"EAL Report" from the Gaseous Effluent Monitor Main Menu. Depress <F8> to acknowledge the alarm. The most I

f- recent EAL Report will be displayed. To print the EAL Report depress the <F9> key. Review the report to determine the current site total TEDE and Child Thyroid dose rates. Determine the Emergency Class and the basis for the Emergency Class. If it is a new Emergency Class or is different from the previous Emergency Class, report the results to the Shift Superintendent.

G. The EAL Report is the first indication of the current site total TEDE and Child Thyroid dose rate values and emergency class. If the TEDE/ Child Thyroid limits are exceeded, Emergency Dose Calculations will begin and the dose calculations, plume display and emergency class will be available once a 10-minute segment boundary has been crossed.

H. Continue to review the EAL Reports to ensure that an 1 emergency class is not exceeded. If the EAL Report indicates that an Emergency Class criteria has been exceeded, provide the Shift Superintendent with the EAL Report. If site total TEDE and Child Thyroid dose !

rates drop below the EAL criteria, EAL Reports will no longer be generated. The EAL Report is available only when the site total activity exceeds one of the EAL criteria.

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(x_ ,/

I. If the TEDE/ Child Thyroid limits are exceeded and Emergency Dose Calculations are completed, a message,

'New Update Available", will be displayed on the screen. Depress <F10> to exit the Gaseous Effluent Monitor Main Menu and select Option 1, 'RDACS Subsystem" from the menu.

J. From the RDACS Subsystem Main Menu, select Option 6,

" Accept New Update". RDACS will begin transferring the plume segment data from the file server to the terminal you are working from.

K. Upon completion of this transfer, the user should select Option 4, " Print Plume Deta" from the RDACS Subsystem Main Menu.

Select Option 2, " Emergency Class Report". The 1.

current plume update number will be displayed in the red field. Depress <rS> to obtain a print out of the " Emergency Class Report".

2. As time allows, come back to the ' Print Plume Data" menu and select Option 1, " Routine Reports." Enter the " Plume Update Number" that you wish to print into the red field. Then depress <F9> to print the report. Do not allow printing " Routine Reports" delay getting the

" Emergency Class Report" to the Shift e'"- Superintendent. Consider printing the " Routine Reports" while you are briefing the Shift Superintendent on the " Emergency Class Report,"

" Plume Map" and " Protective Action Reconnendation."

3. You may also display this information to the screen by selecting Option 3, " Display Plume Data" on the RDACS Subsystem Main Menu.

L. Once you have obtained an RDACS Routine Report, select Option 5, " Protective Action Recommandation" and perform the following steps:

I NOTE on the PAR screen requires the use of the < TAB > key. Data must be Movement entered into the appropriate highlighted areas before RDACS will allow you to proceed to the next step.

The Average Release Rate Factor and Egpected Release Duration will have to be estimated. Request these estimates from the Shift Superintendent

1. Average Release Rate Factor -

a. If the release has stopped, then enter "1" .

Then depress < Tab >.

+

O 1

%)

_ _ _a

I PAGE: 16 of 51 PROC./ WORK PLAN N

O. PROCEDURE

/ WORK PLAN TITLE:

1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 02&434 fh b. If the release is continuing, request that

(_,/ the Shift Superintendent evaluate the event and estimate if the release 'will continue at the same rate, increase, or decrease'.

Quantify the estimate, e.g. if the release is expected to double then enter a factor of

=2=. Then depress < Tab >.

c. If unknown, enter a factor of *1". Then depress < Tab >.

2. Expected Release Durf.i*. ion - Enter duration in hours (20 minutes should be entered as 0.3 hr.)

a. If the release has stopped, use the actual release duration in hours. Then depress

< Tab >.

b. If the release is continuing, request that the Shift Superintendent evaluate the event and estimate 'how much longer the release will continue *. Enter the estimate in hours and then depress < Tab >.

c. If unknown, enter 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . Then depress

< Tab >.

3. Current Sky Condition - If unknown, move the cursor to the " overcast" bracket using the arrow

/T keys and then depress the < SPACE > bar.

s- /

4. Wind Direction - Automatically entered. You may overwrite these values as required.

5. Centerline Dose Rates - Automatically entered.

You may overwrite these values as required.

6. Depress the <F2> key to calculate a Protective Action Recommendation (PAR).

7. Print the calculated PAR by depressing the <F9>

key.

M. Once you have obtained an RDACS Routine Report and PAR f printout, return to the RDACS Subsystem Main Menu, depress <F10> and select Option '/, ' Draw Plume Map *,

A plume map will be displayed on the screen along with additional TEDE radiological data and meteorological information.

1. To select the plume map type - Depress <F4> to cycle through the TEDE and Child Thyroid plume maps. Select the plume map type upon which the

' Emergency Class Report' is based, f~} '

\ / .

x._

~ ----__. - -___-._ i ___- ___ _ _ _ _ _ _ ____

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2. Then depress <F5> to cycle through the 1 mile, 10 mile and 50 mile maps. Select the map size which displays the best view of the plume. To print the map, depress <F9). Then depress <F10> to exit.

N. Remove the last sheet of the RDACS Routine Report, which is the 'RDACS/ Field Data Comparison Sheet", and throw away. This sheet is only used by the Dose Assessment Team.

O, Review the RDACS report, plume map and PAR printed with the Shift Superintendent and have the Snift Superintendent sign the PAR and the approval sheet at the end of the reports.

P, Following the initial generation of the plume segment data plume map and resulting PAR, continue to monitor the release until either the release has stopped or the DAT has assu:aed responsibility for dose assessment.

1. If the *New Update Available" alarm is displayed, depress <F10> to return to the "RDACS Subsystem Main Menu' and repeat steps J - P of this section.

2. You may choose to monitor the release using other RDACS procedure sections. If, while you are

[N monitoring other data, the 'New Update Available"

\

alarm is displayed, select Option 1, "RDACS subsystem Main Manu a from the Gaseous Effluent Monitor Main Menu and repeat steps J - P of this section.

9.1.2 Emergency Operations Facility - Dose Assessment Team A. The Dose Assessment Team will be activated at an Alert or higher emergency class and will report to the Emergency Operations Facility (EOF).

B. Once the Dose Assessment Team has been activated and is ready to assume the dose assessment responsibility, obtain the RDACS key from the EOF emergency kit and unlock the RDACS terminals in Room 262. Both RDACS terminals located in Room 262 of the EOF should be powered up at this time along with their connected printers.

NOTE Powering up both RDACS terminals allows one terminal to be used for forecasting / trend plotting.

v

1 PAGE: 18 of 51 PROC / WORK PLAN N

O. PROCEDURE

/ WORK PLAN TTTLE:

l t

1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 028-03-0 f Once powered up, the Gaseous Effluent Monitor Main C.

\~- Menu will be displayed on the screen. Select either:

1. Option 1, "Online Live Mode' for emergencies. J Or

2. Option 2, *Offline Drill Mode" for drills or exercises.

D. If a flashing message, "New Update Available', appears at the top of the screen, then either TEDE or Child Thyroid dose rate limits have been exceeded and plume segment data is ready to be accepted by the user.

Proceed to Step G below, otherwise, continue with Step E.

E. If there is no flashing message on the screen indicating that plume segment data has been calculated, then monitor the SPINGs for any increased activity using the ' System Status' menu option on the Gaseous Effluent Monitor Main Menu. If a release message indicating that an EAL Report is available appears on the screen, review the EAL Report by selecting Option 5, "EAL Report" from the Gaseous Effluent Monitor Main Menu. A printout may be obtained by selecting the <F9> key.

F. Continue to monitor the EAL Report for the site total fs_/ TEDE/ Child Thyroid values.

G. Once the site total TEDE or Child Thyroid limits have been exceeded, Emergency Dose Calculations will begin in RDACS. Once these calculations are available to the user, a flashing message, "New Update Available*

will appear on the screen. Select Option 1, "RDACS Subsystem", from the Gaseous Effluent Monitor Main Menu.

H. Select Option 6, ' Accept New Update', from the RDACS Subsystem Main Menu. This option transfers the currently stored plume parameter data from the file server to the terminal being used. This operation may take several minutes to complete.

I. Select Option 4, " Print Plume Data", from the RDACS Subsystem Main Menu.

1. Obtain two copies of the " Routine Reports" and plume map for

a. Dose Assessment Supervisor

b. REAM A '

N~A ,

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O. PROCEDURE

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1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 028-03-0 ye~s .

t 4 J. Select Option 1, " Routine Reports" from the Print

\s / Plume Data Menu, then enter the plume update number you want to print and depress <F9> to obtain the print out. The user may also display this information to the screen by proceeding through Option 3, " Display Plume Data" on the RDACS Subsystem Main Menu as opposed to the Print Plume Data option.

K. Remove the last page from the RDACS Routine Report, which is the "RDACS/ Field Dats Comparison Sheet", and route this sheet to the DAT Map Maker.

L. Once the printout is completed, depress <F10> twice to return to the RDACS Subsystem Main Menu, and select Option 7, " Draw Plume Map". A plume map will be displayed on the screen along with additional TEDE -

radiological data and meteorological data.

1. To select the plume map type - Depress (F4> to cycle through the TEDE and Child Thyroid plume maps. Select the plume map type upon which the

" Emergency Class Report" is based.

2. Then depress <F5> to cycle through the 1 mile, 10 mile and 50 mile maps. Select the map size which displays the best view of the plume. To print the map, depress <F9>. Then depress <F10> twice to return to the "RDACS Subsystem Main Menu" s- M. Once you have obtained an RDACS Routine Report and Plume map, select Option 5, " Protective Action Recommendation' from the RDACS Subsystem Main Menu.

Perform the following steps:

NOTE Movement on the PAR screen requires the use of the < TAB > k9y. Data must be t

entered into the appropriate highlighted aseas before RDACS will allow you to proceed to the next step

1. Average Release Rate Factor - Request the forecasted average airborne radioactive release rate for the duration of the release, based upon cenfiguratione of system temperature, pressure, planned remedial actions, probable failures, etc.

from the Dose Assessment Supervisor. Enter a i

factor (e.g. if expected to double then enter a factor of 2.

If unknown, enter a factor of "1".

l l

l I

.g ws

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1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD 0284Xb0 CHANGE:

i Expected Release Duration - Enter known release

k. / 2.

duration in hours (e.g. if 15 minute release, enter .25).

If unknown, enter 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

3. Current Sky Condition - Move the cursor to the correct bracket using the arrow keys and depress the < SPACE > bar.

4. Wind Direction - Automatically entered. You may overwrite these values as required.

5. Centerline Dose Rates - Automatically entered.

You may overwrite these values as required.

6. Depress the <F2> key to calculate a Protective Action Recommendation (PAR).

7. Print the calculated PAR by depressing the <F9> l key.

N. Review the RDACS report, plume map and PAR printed with the Dose Assessment Supervisor (DAS).

O. Following the initial generation of the plume segment data, plume map and resulting PAR, RDACS will alert the user whenever the next plurae segment data is available by flashing a "New Update Available" message l l

g 4 at the top of the screen. Return to the "RDACS Subsystem Main Menu" by depressing <F10> then repeat Steps H - O at the frequency prescribed by the Dose Assessment Supervisor, j 9.2 RDACS OPERATIONS - FORECASTING !

NOTE J Section 9.2 should be performed using the additional RDACS terminal available to the Dose Assessment Team which is not being used as the primary RDACS terminal.

RDACS will allow the user to forecast for a maximum time period of 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months and 59 minutes at one time.

9.2.1 Obtaining a Site Release Rate Fore.ast A. Obtain 2 copies of Form 1904.002E, ' Forecasting Worksheet".

B. Write the current hour in the first hourly block on line "la" and the end of the hourly block in line

1b". Write subsequent hours in the remaining line ala" and "1b* blocks until a 24-hour period is covered (use 2 forms), or out as far as a forecast projection has been requested.

O

~Y

PAGE: 21 of 51 PROC / WORK PLAN NO. PROCEDURE / WORK FLAN TITLE: l '

1904.002 OFFSITE DOSE PROJECTH3NS RDACS COMPUTER METHOD CHANGE: 0284Xh0 C. Transfer the site total release rates (Particulate, Iodine and Noble Gas) from the most recent RDACS Plume Segment Data Report, Page 1 of 2, to lines 2, 3 and 4 of Form 1904.002E.

D. Obtain forecasts of the expected site total release rates from the Dose Assessment Supervisor for the expected duration of the release or 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , whichever is shorter. Record these values in each hourly time block on lines 2, 3 and 4 of Form 1904.002E.

9.2.2 Meteorological Forecasting A. Obtain the most recent meteorological forecase for.the i Russellville area (Pope County) from one of the tollowing sources listed in order of preference:

bKyTE Forecast may be obtained from the Entergy Dispatcher in two ways. Via a network computer with access to ANO-RERl file server or via telephone.

1. Using Network Compuser:

a. Sign on a network computer using personal login ID.

b. Forecast data can be obtained on-line via the ANO Net and the World Wide Web. See RDACS desk guide for instructions.

c. Print forecast to a local printer.

2. National Weather Service - Meteorologist-in-Charge (834-0308 or *834-3955*)

3. KARV Radio (968-1184)

The material contained within these symbols (*) is proprietary or private information.

g

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194.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD 028-03-0 CHANGE:

B. Record the forecast obtained on the bottom of Form 1904.002E in the " Current-Weather Forecast" section.

1. ARZO22 is zone for Pope County.

2. Symbol a>" means "through' and symbol " " means

'and* on forecast printout.

C. Complete the

Cloud Cover" blocks on line 5 of Form 1904.002E with either *CLR*, "PC" or "OVC' based upon the current weather forecast for the duration of the release. Use the following groupings of forecasting terms:

1. 'CLR" = clear skies, fair, sunny, mostly clear or mostly sunny.

2. "P.C.* = partly cloudy, partly sunny.

3. "OVC" = overcast, mostly cloudy, considerable cloudiness, i

NOTE Daylight savings time runs from the first Sunday in April to the last Sunday in October.

I

4. TODAY 0600 to 1800 Standard Time 0700 to 1900 Daylight Saving Time O

+

5. TONIGHT 1800 to 0600 Standard Time 1900 to 0700 Daylight Saving Time

6. TOMORROW 0600 to 1800 Standard Time 0700 to 1900 Daylight Saving Time ,

7. TOMORROW NIGHT 1800 to 0600 Standard Time 1900 to 0700 Daylight Saving Time D. Complete the

Forecast Stability Class" boxes on line 6 of Form 1904.002E with the appropriate stability classes from Attachment 1 based upon the current forecast cloud cover and times of occurrence.

E. Based upon the current weather forecast, complete the

" Forecast Wind Speed" and ' Forecast Wind Direction" lines 7 and 8, on Form 1904.002E for the duration of the release.

b

(

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[\, F. Group together into " Time Blocks' sequential hours during which the release rate and meteorological parameters all fall within the following tolerances of the first hour in the block: wind direction,

100; wind speed, il MPH under 5 MPH and

20% over 5 MPH; stability class, no change; and site total particulate, iodine, and noble gas release rates, all

20% of their values in the first hour of the time block.

G. Transcribe the data for these ' Time Blocks" The into the

' Time Block Summary

on Form 1904.002E.

characteristics of each time block are those of the first hour in the block. The duration is the total number of minutes in the block.

9.2.3 Dose Forecast Processing A. From the RDACS Subsystem Main Menu, select Option 8,

" Switch Operating Modes".

B. Select the <F1> key to get a listing of the possible modcs.

C. Using the cursor keys, move to the ' FORECAST" selection an'd then <CR).

D. Enter the number of updates that have previously been

[,

calculated in " Auto Mode" so that they may be

\

transferred to the forecast files, then depress <r2>. ;

When this transfer is completed, depress <r10> to l return to the RDACS Subsystem Main Menu. If no updates have been calculated, then Initialize RADCS to f

remove old data.

Select Option 2, " ENTER PLUME UPDATE *. l E.

F. From the ENTER PLUME UPDATE MENU, select Option 1,

" UPDATE PARAMETERS fa METEOROLOGY". .

G. Using the completed Form 1904.002E, " Forecasting Worksheet" enter the termination time of the first

" TIME BLOCK' listed on line '9B* next to the TIME STAMP of current update request, then <CR>.

H. Enter the stability class, wind speed and wind direction using lines 14, 15 and 16 of Form 1904.002E.

(Wind speed and wind direction should be the same for both meteorological stations. See Attachment 3 to f select the correct sigma theta value for the stability l class.)

I. Select the <F2> key to enter the meteorological data for the first time block.

/%

i \

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1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD 0284MhD CHANGE:

J. Return to the ENTER PLUME UPDATE MENU by selecting the

<F10> key.

K. If an unmonitored release is involved in the current release from site, select Option 3, " Releases From Unmonitored Points", otherwise, continue with Step L.

L. If no unmonitored release is involved in the current release from site, select Option 2, " Releases From Monitored Points'.

M. Select the point from which the worst release is occurring from site and enter the release rates for particulate, iodine and noble gas listed on lines 11, 12 and 13 of Form 1904.002E. Enter this data by selecting the <F2> key.

N. Return to the ENTER PLUME UPDATE MENU" by selecting

<F10>.

NOTE Before choosing Option 7, " Execute Model", make sure meteorological data and radiological data have been entered. If both have not been updated and Option 7, " Execute Model" is chosen, this will cause the year to change, causing the calculations to be incorrect. If the year changes, you must

" Initialize" and begin entire process again, O. Select Option 7, " Execute Model".

f-w

-- P. Repeat Steps F - O for each summary time block listed on Form 1904.002E.

Q. Once all of the time blocks nave been entered, return to the RDACS Subsystem Main Menu and select Option 4,

" Print Plume Data".

R. Perform sections 9.1.2.J through 9.1.2.M of this procedure to obtain an RDACS Routine Report, plume map and PAR for this forecasted release, i

d i

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1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 028-03-0 5 .

9.3 RDACS OPE 1ATIONS - BACKUP MODE NOTE Once the backup mode is used for processing plume updates, RDACS does not allow plume segments to be transferred from Backup Mode to Auto Mode.

This section will only be used whenever RDACS has failed in the Auto Mode due to a loss of certain primary functions (e.g., loss of both file servers or LAN) or an "unmonitored* release is involved. The user will be alerted whenever the Auto Mode is lost by a displayed failure message on the screen upon startup or a loss of update messages expected every 10 minutes while operating RDACS, If an unmonitored release and a monitored release occur simultaneously, the release rates for the effected sping(s) can be obtained from the " Release darameters' printout (9.3.1.B). These values should be entered per section 9.3.4.F under " Release from Monitored Points' and updated for each report printed. _

9.3.1 Determine Current Release Rates and Meteorological Data NOTE If operating RDACS f rom the Alternate EOF, proceed to Section 9.10 to obtain Release Rate and Meteorological Data.

A. If you have not determined the release rates, refer to:

1. Initial Dose Assessor The Quick Reference Guide on page 4 of 1904.010 Attachment 1, "Unmonitored Releases" and select the appropriate worksheet. Complete the worksheet to determine release rates.

2. Dose Assessment Team The Quick Reference Guide on page 5 of 1904.011 Attachment 1, "Unmonitored Releases" and select the appropriate worksheet. Complete the worksheet to determine release rates. I B. Obtaining Meteorological Data

1. If Meteorological Data is available from RDACS

a. Obtain a print out of the current 10 minute 4

averaged Meteorological Data from the Control Room RDACS terminal, select Option 6, " Data Display" from the Gaseous Effluent Monitor Main Menu.

n V

PROCEDURE / WORK PLAN TITLE: PAGE: 26 of 51 PROC / WORK PLAN NO.

1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD 028-03-0 CHANGE:

\ b. Select Option 3, " Release Parameters". The 10 n.inute average release rate data for all l i

11 SPINGS and the onsite meteorological data will be displayed on the screen. Print this page by selecting <F9>.

NOTE The " Release Parameters" printout does nct include the current temperature.

You may obtain this from the " System Status" screen.

2. If the meteorological data is unavailable from RDACS

a. Obtain Current Meteorological Data and record on 1904.005A to ensure the data is available later for entry into the model. !

(1) If the onsite meteorological system is in service, meteorological data may be {

obtained from Recorders WDR 9300, WSR l 9300 and AAR 9300 located in the Unit )

1 Control Room Cabinet C29. Record >

this data on Form 1904.002A.

(2) If the onsite meteorological system is l out of service, obtain the current wind speed and wind direction from the Dardanelle Dam Corp of Engineers (*968-O(s_/ 5008*) or the Russellville Airport (968-2360) and determine _ a appropriate stability class using Procedure 1904.005, " Atmospheric Stability Class Determination". Record these values on Form 1904.005A.

C. Dose Assessment Team - Report all results to the Dose Assessment Supervisor D. The calculated release rates and meteorological data will be entered into the model later in this Section 9.3.4 after switching to Backup and Initializing in 9.3.3.

9.3.2 To switch to " Backup" A. Select Option 1, "RDACS Subsystem Main Menu", from the Gaseous Effluent Monitor Main Menu.

The material contained within these symbols (*) is proprietary or private information.

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PROCEDURE / WORK PLAN TITLE: PAGE: 27 of 51 PROC / WORK PLAN NO.

1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 0284Xh0

\-- B. Select Option 8, " Switch Operating Modes", from the RDACS Subsystem Main Menu.

C. Depress <F1>, using the cursor key, move to " Backup".

Then select by depressing <CR>:

1. If you are starting up RDACS initially or if no updates have been calculated previously in " Auto Mode", enter *0" into the plume update number field, then select <F2> to complete the switch to

Backup". Depress <F10> to return to the "RDACS Subsystem Main Menu', and proceed with Section 9.3.3.

Or

2. If updates have been calculated previously using the " Auto Mode", then enter the total number of updates previously calculated, depress <r2> then depress <r10> to return to the "RDACS Subsystem Main Menu", and proceed with Section 9.3.4.

9.3.3 Initialize RDACS as follows:

A. From the RDACS Subsystem Menu, select Option 1, " Initialize RDACS".

To select " Initialize", depress the "Y" key.

O)

( B.

C. To enter the initializing date and time.

1. Enter the " Release Start date" into the 'Date Field", then depress < Tab >. ,

1

2. Enter the " Release Start Time" in the " Time )

Field', then the cursor will return to the l

'Yes/No a field, l

3. Complete initializing by depressing the <F2> key. I RDACS will return to the "RDACS Subsystem Main l Menu". l l

9.3.4 Enter the values obtained for release rate and meteorology by_ performing the following:

A. From the RDACS Subsystem Main Menu, select:

Option 2, " Enter Plume Update".

B. Select Option 1, ' Update Parameters and Meteorology".

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l 1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD 028-03-0 )

CHANGE:

i j ~s k, C. For the

Current Update Time"-

m

1. If the release has stopped, enter the release stop time or the time that gives an update interval equal to the total release time, then depress <CR> and proceed to Section D below.

2. If the release is continuing, enter the approximate time of the data which was used for l the release rate worksheet calculation. Then !

depress <CR>.

D. Enter Windspeed Imph), Wind Direction (Degrees from),

and Atmospheric Stability Class from either of the following sources:

1. Meteorological Data from the RDACS printout of

" Release Parameters *.

a. For Monitored releases use data from the 57 meter tower,

b. For Unmonitored releases use data from the 10 meter tower.

Or

2. Meteorological Data from Form 1904.005A, I 'T " Determining Atmospheric Stability *.

b 3. If necessary, use 1904.002, Attachment 3 to select the Sigma-Theta that corresponds to the current stability class.

E. Once the entries have been made, depress <F2>.

Then depress <F10> to return to the " Enter Plume Update" menu.

F. Depending upon the previously determined release pathway (s), select one or both:

Option 2, " Release From Monitored Points".

Option 3, " Release From Unmonitored Points".

G. Enter the release rates for particulate, iodine, and noble gas and depress <F2>.

H. If a release has terminated, remove the applicable release rates before processing the next update.

O

PROCEDUEE/ WORK PLAN TITLE:

PAGE: 29 of 51 PROC /WOPK PLAN NO.

1904.002 OFFSITF. DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 0284Kh0 5% I. Depress <F10> to return to the " Enter Plume Update Menu".

NOTE Before choosing Option 7, " Execute Model", make sure meteorological data and radiological data have been entered. If both have not been updated and Option 7, " Execute Model' is chosen, this will cause the year to change, causing the calculations to be incorrect. If the year changes, you must

' Initialize" and begin entire process again.

J. Select Option 7, " Execute Model".

K. Depress <F10> to return to the 'RDACS Subsystem Main Menu".

9.3.5 Print Reports A. Initial Dose Assessor - From the 'RDACS Subsystem Main Menu', select:

1. Option 4, " Print Plume Data".

2, Then select Option 2, " Emergency Class Report".

The curren: plume update number will be displayed in the red field. Depress <F9> to obtain a printout of the ' Emergency Class Report".

As time allows, come back to the " Print Plume

(g 3.

Data" menu and Select Option 1, " Routine

( ,f Reports". Enter the ' Plume Update Number

that you wish to print into the red field. Then depress <F9> to print the report. Do not allow printing " Routine Reports" to delay getting the ,

" Emergency Class Report" to the Shift f Superintendent. Consider printing the " Routine ;

Reports' while you are briefing the Shift Superintendent on the ' Emergency Class Report",

" Plume Map" and " Protective Action Recommendation".

4. You may also display this information to the screen by selecting Option 3, " Display Plume Data" on the "RDACS Subsystem Main Menu".

5. Once the printout is complete, depress <F10> {

twice to return to the 'RDACS Subsystem Main j Menu". Then select Option 7, " Draw Plume Map".

A plume map will be displayed on the screen along with additional TEDE/ Child Thyroid radiological data and meteorological information.

a. To select the plume map type - Depress <F4>

to cycle through the TEDE and Child Thyroid l plume maps. Select the plume map type upon which the = amergency Class Report

is based.

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'- b. Then depress <F5> to cycle through the 1 mile, 10 mile and 50 mile maps. Select the nap size which displays the best view of the plume.

c. To print the map, depress <F9>.

d. Then depress <F10> to the "RDACS Subsystem Main Menu"

e. Go to 9.3.6 to obtain PAR.

B. Dose Assessment Team -

1. From the "RDACS Subsystem Main Menu', select:

Option 4, " Print Plume Data".

2. From the ' Print Plume Data" menu:

Select Option 1, " Routine Reports" and depress

<CR>. Then enter the " Plume Update Number" that you wish to print, into the red field and depress

<CR>.

Depress <F9) to obtain a complete printout of the current Emergency Class and dose information, printout of the "Ex.ergency Class Report". You f"'s may also display this information to the screen

() by selecting Option 3, " Display Plume Data' on the "RDACS Subsystem Main Menu".

I f

Obtain two copies of the " Routine Reports' and

plume Map". One copy will be used by the DAT/DAS and the other copy will be used by the REAM / REAM Assistant.

3. DAT Projection Operator should remove the last page from the " Routine Reports", which is the "RDACS/ Field Data Comparison Sheet *, and route this sheet to the DAT Map Maker.

4. Once the printout is complete, depress <F10>

twice to return to the 'RDACS Subsystem Main Menu *

5. Then select option 7, " Draw Plume Map".

a. To select the plume map type - Depress <F4>

to cycle through the TEDE and Child Thyroid plume maps. Select the plume map type upon which the " Emergency Class Report" is based, v

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kw b. Then depress <F5> to cycle through the 1 mile, 10 mile and 50 mile maps. Select the map size which displays the best view of the plume.

c. To print the map, depress <F9>.

d. Then depress <F10> to return to the 'RDACS Subsystem Main Menu".

9.3.6 Calculate Protective Action Recommendation (PAR)

NOTE Movement on the PAR screen requires the use of the < TAB > key. Data must be untered into the appropriate highlighted areas before RDACS will allow you to proceed to the next step.

The Average Release Rate Factor and Expect 3d . Release Duration will have to be estimated.

A. Request

Average Release Rate Factor" and

Expected Release Duration" from one of the following:

1.

Shift Superintendent

2. TSC Director

3. TSC Operations Manager

Initial Dose Assessor only. .)

1 B. Once you have obtained an RDACS

Emergency Class i Reporta and a " Plume Nap", select Option 5, l

" Protective Action Recommendation" from the RDACS ]

Subsystem Main Menu and perform the following steps: !

1. Average Release Rate Factor - i

a. If the release has stopp_ed, then enter "1".

Then depress < Tab >. ,

b. If the release is continuing, quantify the estimate obtained in step A above, e.g. if the release is expected to double then enter a factor of "2". Then depress < Tab >.

s

c. If unknown, enter a factor of "1". Then depress < Tab >.

2. Expected Release Duration - Enter duration in hours (20 minutes should be entered as 0.3 hr.) i

a. If the release has stopped, use the actual release duration in hours. Then depress

< Tab >.

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O If the release is continuing, enter the

\s ') b.

estimate in hours obtained in step A above and then depress < Tab >.

c. If unknown, enter 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . Then depress

< Tab >.

3. Current Sky Condition - If unknown, move the cursor to the " Clear skies" bracket using the arrow keys and then depress the < SPACE > bar.

4. Wind Direction - Automatically entered. You may overwrite these values as required.

5. Centerline Dose Rates - Automatically entered.

You may overwrite these values as required.

6. Depress the <F2> key to calculate a Protective Action Recommendation (PAR).

7. Print the calculated PAR by depressing the <F9) key.

C. Initial Dose Assessor - Remove the last sheet of the RDACS Routine Report, which is the 'RDACS/ Field Data Comparison Sheet *, and throw away this sheet. For the initial PAR and subsequent PARS that change, review the ' Emergency Class Report

and PAR with the Shift

(g Superintendent and have the Shift Superintendent sign

( ) the PAR and approval sheet at the end of the reports.

D. Dose Assessment Team - Remove the last sheet of the ,

RDACS Routine Report, which is the 'RDACS/ Field Data i Comparison Sheet *, and route this sheet to the DAT Map Maker. Then review the RDACS reports, plume map and PAR printed with the DAS and have the DAS sign the PAR and the approval sheet at the end of the reports.

E. Following the initial generation of plume segment data, continue to monitor for releases. As either time allows or as the unmonitored release changes, return to Section 9.3 and repeat steps 9.3.1, 9.3.4, 9.3.5, and 9.3.6. l l

9.4 DETERMINATION OF CURRENT RELEASE RATE AND METEOROLOGICAL CONDITIONS BKXPE l If the Control Room RDACS terminal is not operable, proceed to step 9.4.2 of this section. l 9.4.1 If the SPING data and the meteorological data is available from the RDACS Control Room terminal, obtain the current 10 minute averaged SPING and meteorological data from the Control Room RDACS terminal, by selecting Option 6, " Data p Display", from the Gaseous Effluent Monitor Main Menu.

t V)

PROCEDURE / WORK PLAN TITLE:

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1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 0284 10 C\ A. Obtaining Radiological Release Rate / Meteorological Data

1. Select. Option 3, " Release Parameters". The 10 minute averaged release rate data for all 11 SPINGS and onsite meteorological parameters will be displayed on the screen. Print this page by selecting the <F9> key.

2. Report all results to the Dose Assessment Supervisor if dose assessment is being performed by the Dose Assessment Team.

NOTE The " Release Parameters' printout does not include the current temperature, which may be obtained from ' System Status' screen.

9.4.2 If the SPING data and/or the meteorological data is unavailable from the RDACS Control Room terminal, perform the following sections:

A. Obtaining Radiological Release Rate

1. Refer to Procedure 1904.004 for determining release rates.

Ih 2. Document all data on Form 1904.002B.

V 3. Report all results to the Dose Assessment Supervisor if dose assessment is being performed by the Dose Assessment Team.

4. Continue with Section B below.

B. Obtaining Current Mettorological Data

1. If the onsite meteorological system is in service, meteorological data may be obtained from Recorders WDR 9300, WSR 9300 and AAR 9300 located in the Unit 1 Control Room Cabinet C29. Record this data on Form 1904.002A.

2. If the onsite meteorological system is out-of-service, obtain the current wind speed and wind direction f rom the Dardanelle Dam Corp of Engineers (*968-5008*) or the Russellville Airport (968-2360) and determine the appropriate stability class using Procedure 1904.005,

" Atmospheric Stability Class Determination *.

Record these values on Form 1904.002A, I

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Of 9.4.3 Obtain the estimated release start date and time from the Shift Superintendent. Record this release start time as the Time Stamp of Initial Release on Form 1904.002A.

Record the Time Stamp of Current Update in the appropriate space in 1904.002A, If meteorology and release rate data time stamps are not the same, use the release rate data time as the Current Update Time.

9.4.4 Dose Assessment Team - report all results to the DAS.

Continue with 9.4 5 below.

9.4.5 Enter the calculated release rate and/or meteorological data in accordance with Section 9.3.4 for " Backup Mode

operation or Section 9.5.4 for ' Auto Mode" operation.

9.5 STATUS CHANGE REPORTS 9.5.1 A Status Change Report (SCR) message will be displayed on the RDACS terminal whenever a SPING changes status (e.g.,

Good to Missing) or meteorological data is missing and Emergency Dose Calculations (EDC) have started.

9.5.2 If a SCR message appears on the RDACS terminal, select Option 4, " Status Change Report", from the Gaseous Effluent Monitor Main Menu and depress the <FS> key to acknowledge the message.

9.5.3 The user should note the following indications on the

-g screen:

A. When a SPING or a meteorological data channel has changed from " Good" to " Bad", those areas will be highlighted by blue fields. RDACS will continue to process using the previous value until the user edits this value. If the affected SPING is not a major contributor to the site total release, the user may wish to place certain channels on this SPING in STANDBY (refer to section 9.5.5). If the SPING is a major contributor to the site total release, refer to section 9.4 of this procedure to determine new SPING/ meteorological data and then continue with section 9.5.4.

B. When a SPING or a meteorological data channel has changed from " Bad

to " Good *, those areas affected will be highlighted by green fields. RDACS will automatically obtain and use these values during the next update.

NOTE If the meteorological data is staying the same, it is best to leave values alone and let RDACS use last set of good data for calculations.

,~~g The material contained within these symbols (*) is proprietary or private

( information.

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f 9.5.4 Editing for Missing SPING/ Meteorological Data A. Once new values have been obtained for those SPINGS/

meteorological channels determined in Section 9.5.3, you may edit new values into RDACS from the Status Change Report Screen.

B. Using the cursor keys, move to the highlighted blue field that you wish to edit and type in the new value(s). Depress the <F2> key.

C. Once new values have been entered into the system, RDACS will begin using these values for all updates that follow until manual numbers are removed.

D. When SPING or Meteorological data channels change from abad" to " good", it is necessary to set system back to normal and to remove the manually entered numbers from the system.

E. Go to the ' Status Change Report" screen. Tab to the field with the manually entered data (Ceyenne display) and type "NONE' in ALL CAPS and <F2> to save. This will set the alive" data back to "off scan" and

" average" data to "On Scan *, as it should be.

9.5.5 Placing _SPINGS in Standby Mode l' SPINGS should only be placed in standby CAUTION when no suspected release via this SPING is expected. The user should notify the Dose Assessment Supervisor prior to performing this section.

A. If any SPING continually initiates a status change alarm and is not considered a major contributor to the site total release, the user may desire to place the affected SPING channels in STANDBY MODE.

B. From the Gaseous Effluent Monitor Main Menu, select Option 2, "SPING Subsystem".

C. From the SPING Subsystem Menu, select Option 1, "SPING Control".

D. Using the cursor keys, move to the SPING of choice, then enter < RETURN >.

E. Select the channel that you wish to put on standby which was previously identified on the Status Change Report and then < RETURN >.

F. Select Option 6, " Standby-On" using the cursor arrows and then < RETURN >. Verify your selection has been displayed onto the command block on the screen.

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f)

('d)'

G. Repeat steps D-F for each SPING which is to be placed in STANDBY.

H. Once all channels affected have been placed in STANDBY, return to the Gaseous Effluent Monitor Main Menu by depressing the <F10> key.

9.6 EDITING FOR UNMONITORED RELEASES 9.6.1 Unmonitored releases are not detected by SPING detectors or releases which the SPING can not communicate with the file server.

9.6.2 If an unmonitored release is occurring, go to Section 9.3.

The unmonitored release will be entered into RDACS using the RDACS " Backup Mode" as outlined in Section 9.3.

9.7 CENTERLINE DOSE RATE ADJUSTMENTS FOR FIELD DATA - SCALE FACTORS CAUTION Perform this section only as directed by the Dose Assessment Supervisor.

Scale Factors edited in the RDACS " Auto Mode" will automatically change the values on the file server.

9.7.1 Obtain the most recent RDACS/ Field Data Comparison Sheet generated with the RDACS Routine Report and record the RDACS and field data centerline dose rates on Form 1904.002D for both Noble Gas (gamma) and Iodine.

(O) 9.7.2 Divide the measured dose rates by the projected dose rates and record this value on Form 1904.002D under the M/P ratio heading for each downwind distance for which data is available.

9.7.3 If the M/P ratio is consistently larger than 2.0 or smaller than 0.5 at two or more radii, the scale factor should be changed to correspond with this deviation upon direction by the DAS.

9.7.4 Average the M/P ratios for the current data and record this value in the Avg. M/P Ratio block on Form 1904.002D.

NOTE Unless previously changed, the current scale factor on RDACS will be set at 1.0.

9.7.5 Multiply the current scale factor by the average M/P ratio and record this value as the new scale factor on Form 1904.0020.

9.7.6 From the RDACS Subsystem Main Menu, select Option 2 " Enter Plume Update".

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(' I " Dose

'/ 9.7.7 From the Enter Plume Update Menu, select Option 4, Scale Factors".

9.7.8 Enter the new Noble Gas and Iodine scale factor values from a Form 1904.0020.

9.7.9 Press the <F2> key to enter the value into the model. The message " Record Updated" should appear at the bottom left of the screen. Depress <F10> to exit the screen.

9.7,10 If in " Auto Mode

the next available plume segment will use the new dose scale factor information when calculating the next plume segment.

9.7.11 If in " Backup Mode' the new dose scale factor will be used when all data for the next plume segment is entered and that segment is processed.

9.8 ISOTOPIC DISTRIBUTION CHANGES CAUTION Perform this section only as directed by the Dose Assessment Supervisor.

Isotopic distributions edited in the RDACS " Auto Mode

will automatically change the values on the file server.

/N 1 NOTE

?

V Each release path can be assigned individual iodine, particulate, and noble gas isotopic distributions. The gross iodine, particulate, and noble gas concentrations measured by the SPINGS for each release path are used to scale these isotopic distributions, resulting in the isotopic release rates used in the offsite dose calculations.

NOTE The calculated offsite doses can be modified substantially by changes to the isotopic distributions which would appear to be slight.

9.8.1 The isotopic distributions for a release pathway should be changed whenever new laboratory data is obtained detailing the relative concentrations of isotopes being discharged via that pathway.

9.8.2 Complete Form 1904.002F for each affected release pathway for which the isotopic distribution is being revised.

9.8.3 From the RDACS Subsystem Main Menu, select Option 2, " Enter Plume Update".

l 9.8.4 From the Enter Plume Update Menu, select Option 5, j

" Isotopic Distribution".

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9.8.5 From the Isotopic Distribution Menu, select option 1,

" Monitored Points" for releases occurring from monitored points and isotopic distribution data is available for these points. Select option 2, "Unmonitored Points" for j releases occurring from unmonitored points and isotopic l distribution data is available for these points.

9.8.6 Select the " Point ID" for which you wish to change the isotopic distribution by cycling through the active pathways using the <r3> key.

9.8.7 When the pathway of choice is displayed on the screen, press < ENTER >.

9.8.8 Press <r1> for a menu selection of possible isotopic distribution sources.

9.8.9 Select the appropriate source by pressing the arrow keys to highlight the correct option and press < ENTER > < ENTER >.

9,8.10 Enter the sample date and time for the laboratory data you wish to enter followed by < ENTER >.

9.8.11 Enter the appropriate isotopic information next to the isotope of choice in pCi/cc.

9.8.12 When all data for particulate, iodine and noble gas values have been entered for all monitored release points, press

<r2>.

9.8.13 The message " Record Updated" should appear at the bottom left of the screen.

9.8.14 Press <r10> twice.

9.8.15 If in " Auto Mode" the next available plume segment will use the new isotopic distribution information when calculating the next plume segment.

If in " Backup Mode" the new isotopic distributior. '

be 9.8.16 used when all data for the next plume segment is e. cered and that segment is processed.

9.9 DATA TRENDING 9.9.1 RDACS has the capability to trend historical or current data.

To initiate data trending, select option 6, " Data Display",

9.9.2 from the Gaseous Effluent Monitor Main Menu.

9.9.3 When the submenu appears, select option 1, " Data Trending *.

O,O.

1 PROC./ WORK PLAN NO. PROCEDURE / WORK PLAN TITLE: PAGE: 39 of 51 1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 028-03-0 9.9.4 Using the <F7> key, select the trend mode desired (i.e.,

Auto Update or Historical).

9.9.5 The user must then enter the appropriate responses to the following:

A. TREND NAME - Enter the name that you wish associated with the trended data (8 characters maximum) or blank for an unnamed plot. Press < ENTER >.

B. DATA RESOLUTION - A submenu will appear requesting either 2 minute, 10 minute or 60 minute trending.

Using the cursor keys, move to the selected time sequence and select < ENTER >.

C. POINT ID - Depress the <F1> key to get a listing of possible SPING/ meteorological data selections that you desire to trend. As you select your choice, a series of menus will be presented to help you focus-in on your selection. Press < ENTER > and RDACS will display the current value of the trend data requested.

D. MINIMUM VALUE - Enter the minimum value that you wish your trend to include. If you leave this field blank, this value will be automatically selected. Press

< ENTER >.

E. MAXIMUM VALUE - Enter the maximum value that you wish your trend to include. If you leave this field blank,

[\-s)/ this value will be automatically selected. Press

< ENTER >.

F. PLOT DATA TIME FRAME - Enter the dates and times that you wish your trend to include. Once entered, depress the <F4> key to obtain or begin obtaining the trend information.

9.9.6 Graphing Trends A. From the Point Trend Display screen, select the.<F5>

key to graph the trend that you desire.

B. If your trend displays values outside of the minimum and/or maximum fields defined previously, you may perform one of two functions to obtain those values outside of this range as described below:

1. The user may return to the Trend Display screen and enter new minimum / maximum values to broaden the graphed range.

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2. The user may, once the graph is displayed, use the left or right cursor arrow keys to place a bar on the graph and move this bar to a particular location on the trended data. The value of the point at which the bar is positioned will be displayed by depressing the <r7> key.

The user may wish to return to the Trend Display screen at this time and enter new minimum / maximum values.

9.9.7 Saving/Cbtaining Trend Data A. To save trended data, the user must depress the <F2>

key and assign a name to the trended data from the Point Trend Display screen.

B. To obtain previously performed trend information, the user must position the blinking cursor in the Point I.D. blue block and depress the <F3> key. Select "Get Trenda and then enter the name of the trend desired.

If you want a listing of previously saved trends, depress the <r1> key to get a listing of those trends.

9.10 Obtaining RDACS Data from the Alternate EOF NOTE In the event evacuation of the EOF to the alternate location is required, the Dose Assessment Supervisor will ensure that an RDACS terminal, modem, I and associated printer are relocated to the alternate location, 9.10.1 Ensure the RDACS computer is plugged in and connected to the printer and keyboard.

9.10.2 Ensure that the RDACS computer is "ON" and in the " Drill" mode.

9.10.3 Ensure the toggle switch on the back of the modem is "ON".

9.10.4 Ensure that the modem is connected via a telephone line to a telephone jack.

9.10.5 Ensure that the cable connections are secure between the modem and the RDACS computer, f l

9.10.6 Ensure that the Gaseous Effluent Monitoring System Main i Menu is on the RDACS screen. This is automatic upon turning on the computer.

1 9.10.7 Depress the < ESC > key, then select "Y" to end RDACS l session. A "C:\SST>" should appear on the screen.

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9.10.8 Type TERM, then depress the < Enter > key. This will enter the TERM program and will automatically call the file server. The operator should be able to hear the modem placing the call. If the connection is made, the message

" call connected" will appear followed by "login a. If this does NOT occur, check connections and hit the < Enter > key to retry.

9.10.9 If drill data is desired, the login and password should be, "rlsdrilla. If live data is desired, the login and password should be, "rlslive'.

9.10.10 Check that the Release Parameters Update screen is correctly drawn. If it appears to contain errors such as column alignment or misplaced data then the screen can be redrawn by <ctr1> <L>.

9.10.11 Depress the < Print Scrn> key. The printer will NOT auto-feed the paper so it will be necessary to press the 'on line' key on the printer followed by the aform feed' key and then the 'on line" key again to turn the printer back on.

9.10.12 Enter < Alt > and then 'Y' to exit TERM. This should automatically return the user to the RDACS Main Menu. If this does not occur, re-boot the computer.

9.10.13 Enter data in accordance with section 9.3, RDACS OPERATIONS

- BACKUP MODE.

10.O ATTACHMENTS AND FORMS 10.1 ATTACHMENTS 10.1.1 Attachment 1 - Typical Stability Classes by Date, Time, and Cloud Cover 10.1.2 Attachment 2 - RDACS System Configuration 10.1.3 Attachment 3 - Sigma Theta / Stability Class Comparison 10.1.4 Attachment 4 - Dose Assessor's Quick Reference Backup Mode 10.2 FORMS 10.2.1 Form 1904.002A - Plume Update Parameters / Meteorology Worksheet 10.2.2 Form 1904.002B - Plume Update Parameters / Release Rate Worksheet l 10.2.3 Form 1904.002D - Dose Scale Factor Worksheet 10.2.4 Form 1904.002E - Forecasting Worksheet 10.2.5 Form 1904.002F - Isotopic Distribution Documentation Worksheet

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PROC / WORK PLAN NO. PROCEDURE / WORK PLAN TITLE: PAGE: 42 of 51 l 1904.002 OFFSITE DOSE PROJECTIONS RDACS COMPUTER METHOD CHANGE: 0264Xh0

%i i

d ATTACID' INT 1 1

4 Typical Stability Classes by Date, Time, and Cloud Cover STANDARD Feb. 16 - Apr. 22 f TIME FRAME and Aug. 23 - Oct. 25 Apr. 23 - Aug. 22 Oct. 26 - Feb. 15 PARTLY PARTLY PARTLY CLEAR CLOUDY CLEAR CLOUDY CLEAR CLOUDY E F E F E Midnite - 1:00 F E F E F E 1:00 - 2:00 F E F E F E 2:00 - 3:00 F E F E F E 3:00 - 4:00 F F E F E F E 4:00 - 5:00 E F E F E F

__5:00 - 6:00 D F E 6:00 - 7:00 D D D D D C D D D 7:00 - 8:00 ~'

C D B C D D 8:00 , 9:00 D B C B C C

_9j00 - 10:00 D B C B C C 10:00 - 11:00 ~'

B C B B C C 11:00 - Noon B C B B B D Noon - 13:00 B C B B C D 13:00 - 14:00 B C B C C D

_14:00 - 15:00 C C B C C D

_15:00 - 16:00 D B C D D

_16:00 - 17:00 D D D C D D D 17:00 - 18:00 D D D F E

[)

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18:00 - 19:00

_19:00 - 20:00 D

F E F E F E F E F E F E 20:00 - 21:00 E F E F E 21:00 - 22:00 F E F E F E 22:00 - 2_3:00 F F E F E F E 23:00 - Midnite NOTE For overcast (OVC.) conditions, the stability cle typically is "D* at all hours and seasons This stability class chart is based on Standard Time. During Daylight (Example - If it is 1000 hours0.0116 days 0.278 hours 0.00165 weeks 3.805e-4 months and Daylight Savings Time is currently being used, you must read the chart above in the 9:00-10:00 range.)

Savings Time runs from the first Sunday in April to the last Sunday in October.

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ATTACHMD4T 3 Sigma Theta / Stability Class Comparison Stability Class Sigma Theta Range Sigma Theta

A ---------------------------------- 22.5 to 30 26.3

17.5 to 22.4 20.0 B

12.5 to 17.4 15.0 C

D ---------------------------------- 7.5 to 12.4 10.0

-------------- 3.8 to 7.4 5.6 E

F ---------------------------------- 2.1 to 3.7 2.4

less than 2.1 1.0 G

Sigma Theta value to be used to convert from Sigma Theta letter designation to Sigma Theta number designation.

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(v) Attachment 4 Page 1 of 2 DOSE ASSESSOR'S QUICK REFERENCE BACKUP MODE NOTE This guide is intended to enable the dose assessor to quickly review the essentials of operating in backup mode. Full step-by-step instructions can be found in section 9.3 of procedure 1904.002.

1. Obtain weather - <F10> if needed to reach Main Menu Option 6 Main Menu (Data Display)

Option 3 (Release Parameters)

<F9> to print

<F10> to exit 1

2. Switch Modes - (Only on first update)

Option 1 (RDACS Subsystem Main Menu)

Option 8 (Switch Operating Modes)

<F1> to choose mode

< Enter >

<F2> to save data

<F10> to exit

3. Initialize - (Only on first update)

Do _NOT initialize if transferring plumes.

Option 1 (Initialize RDACS)

Use time release began for initialization time.

<F2> to save data (A

v

) <F10> to exit

4. Enter Data - Option 2 (Enter Plume Update)

Option 1 (Update parameters and meteorology)

Use release stop time as current update time or sample time if release is ongoing.

Check update time interval for reasonableness.

Enter Met data - TEMP not required.

<F2> to save data

<F10) to exit Option 2 or 3 (Honitored or Unmonitored data)

Enter Rad. data in correct area

<F2> to save data

<F10> to exit Option 7 (Execute Model)

<F10> to exit V)

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i, Page 2 of 2 k_,) Attachment 4 NOTE The following printouts can be obtained in any order as determined by the dose assessor based on ccaditions. The following cptions can be found on the RDACS Subsystem Main denu. If necessary, press <F10> until this screen is displayed.

5. Print Data - Option 4 (Print Plume Data)

Option 1 for full report. Other options as needed.

<F9> to print

<F10> to exit

<F10> again to exit Print Plume Data Screen

6. PAR - Option 5 (Protective Action Recommendation)

Enter " Avg. Release Rate Factor"

<1 situation will get better soon i 1 situation expected to remain same i

>l situation will get worse Enter estimate for duration of release

< Tab >

Select CURRENT sky conditions. Always make this j selection (spacebar) even if choosing the option i currently selected. This will recalculate the !

l stability ratio.

< Tab > f Q(/ <F2> to calculate Projected Doses

<F9> to print PAR l'

Compare projected doses to limits on printout and make changes to choices as necessary.

<F10> to exit

7. Draw Plume Map - Option 7

<F4> toggle map TYPE

<F5> toggle map SIZE

<F9> to print

<F10> to exit Normally you will return to step four (4) as necessary to enter new data and continue through the remaining steps as desired.

l O

v A

Pcge 47 of 51 I

(,) PLUME UPDATE PARAMETERS 1.0

Time Stamp of Initial Release mm/dd/yy hh:mm:ss __/ _/__ ___ : _ : 0 0

- Time Stamp cf Current Update mm/dd/yy hhtmm:ss _/_ /_ _:_:00 (Use time stamp of release data.)

Override Calculated Release Height (circle one) No/Yes (default = no)

Manually Entered Release Height (if yen above) meters Use Vertical Ceiling Reflection (circle one) Yes/No ,

(default = yes)

Vertical Mixing Height Limit (default = 500) meters i

METEOROLOGY !

2.0 STATION 1 STATION 2 DESCRIPTION 10 METERS 57 METERS Source of Meteorology **[1. On-Site Tower] [2. NWS/WSI][3. Other]

(Choose one):

Time Stamp of Met Data mm/dd/yy hh:mm:ss _/_ _/_ __:_:00 Reference Temperature (deg C)

(oC = 0.556{ F32])

Delta-T (deg C) h'.nd Speed (riph )

Wi.C Direction (deg )

Sigma-Theta ideg )

Horizontal Stability Class (A - G)

Vertical Stability Class (A - G)

Must be entered on initial update.

- Must be entered on initial and subsequent updates.

NOTE: If the On-Site Meteorological Tower is out-of-service, obtain the windspeed, wind direction, and stability class as stated in Section 9.4.2.B.2 of Procedure 1904.002.

FORM TITLE: FORM NO. REV.

PLUME UPDATE PARAMETERS / METEOROLOGY WORKSHEET 1904.002A 028-03-0

Ptge 48 of 51-

!)( Time Stamp of Current Update mm/dd/yy hh:mmiss __/__/__ ._ :__:00 RELEASE RATES t

Particulate

Iodine

Noble Gas Point Id. ,,,,Descriptor (Ci/sec) ,,(C1/sec) _ (Ci/sec) __

Flow (CFM) Ch. 1 Ch. 3 Ch. 5/7/9 MONITORED RELEASES SPINGS E E E M01 1/ Containment Purge __

E E E M02 1/Redwaste E E M03 1/ Fuel Handling _E_____

E E E M04 1/ Pen, & H2 Purge _

E M05 2/ Containment Purge _. _ E E E E E M06 2/Radwaste E E M07 2/ Fuel Handling .E E E E M08 2/ Pen. & H2 Purge E E E M09 PASS Building E E E M10 2/ Aux. Bldg. Ext.

E E E M11 Low-Level Radwaste UNMONITORED RELEASES E___ __ E l UO1 1/ Containment Leakage (1904.004F) n/a E E UO2 2/ Containment Leakage (1904.004F) n/a -

(1904.004E) n/a E E

[^T UO3 Unmon. Measured Indoors E E

\ UO4 Unmon. Measured Outdoors (1904.004F) n/a i n/a E E '

U05 1/ Contaminated Steam (1904.004G)

(1904.0t4H) n/a _____ E E UO6 2/ Contaminated Steam

NOTE - Release rates must be entered into RDACS in the units of Ci/sec.

To convert pci/cc to Ci/sec, perform the following calculation:

Ci/Sec = pei/cc x Flow (CFM)/2119 I

i fx N -

FORM NO. REV.

FORM TITLE:

1904.0028 028 03-0 PLUME UPDATE PARAMETERS / RELEASE RATE WORKSHEET

P;ge 49 of 51 (dD 1.0 Time stamp of Current Update mm/dd/yy hh:mm:ss _/_/_ _ :_:00 2.0 NOBLE GAS SCALE FACTOR CALCUIATION l Measured Data (Field) Projected Data (RDACS)

Measurement Radius / Dose Update Dose M/P Time Sector Rate (M) Time l Radius Rate (P) Ratio AVG. M/P Ratio:

Current Noble Gas Scale Factor:

New Noble Gas Scale Factor = Current Scale Factor x Average M/F Ratio 3.0 IODINE SCALE FACTOR CALCULATION Measured Data (Field) Projected Data (RDACS)

Radius / Update Dose M/P FN Measurement Dose Rate (P)

Time Sector Rate (M) Time Radius Ratio AVG. M/P Ratio:

Current Iodine Scale Factor:

New Iodine Scale Factor = Current Scale Factor x Average M/P Ratio B

One (1) unless previously changed.

PERFORMED BY /

Initial /Date REVIEWED BY /

Initial /Date p)

I C

FORM TITLE: FORM NO. REV.

DOSE SCALE FACTOR WORKSHEET 1904.002D 028-034

P:ge 50 of 51 10

'g

, HOURLY

SUMMARY

l la. Time Frame: From ib. Time Frame: To

2. Particulate Re-lease Rate (Ci/sec)

3. Iodine Release Rate (Ci/sec)

4. Noble Gas Release Rate (Ci/sec)

5. Cloud Cover

6. Stability Class

7. Wind Speed (MPH)

8. Wind Direction **

(from. Deg.)

TIME BLOCK

SUMMARY

_9a. Time Frame: From 9b. Time Frame: To

/) 10. Duration (Minutes)

( j

11. Part. Release Rate (Ci/sec)

12. Iodine Release Rate (Ci/sec)

13. Noble Gas Release Rate (Ci/sec)

14. Stability Class

15. Wind Speed (MPH)

16. Wind Direction (from. Deg.)

Current Weather Forecast:

For " Light' winds, use 2.5 mph. Performed By _/

Initial /Date

- For " Variable" winds, use current wind direction from Reviewed By Met Tower.

t 1

t G'

FORM TITLE: FORM NO. REV.

FORECASTING WORKSHEET 1904.002E 026-03-0

+ Page 51 of 51

('N Q Instructions 1.0 Complete this Form (1904.002r) each time that the isotopic distribution is revised from the normal values.

2.0 Following the actual event or drill / exercise, ensure that the actual isotopic distribution values are re-entered into the RDACS, then sign and date the form.

3.0 Forward this form to the Emergency Planning section at Arkansas Nuclear One.

Table I Affected Release Pathway Isotope Original Value (uci/cc)l Revised Value (pci/cc)

RU-106 0 TE-132 0 CS-134 0 CS-137 1 E+2 La-140 0 Ba-140 0 Ce-144 0 I-131 1.75 E+1 I-132 1.03 E+1 Z-133 3.51 E+1 I-134 1.03 E+1 I-135 2.68 E+1 KR-85 2.00 E-1

('")%

'g KR-87 KR-88 9.00 1.10 E+0 E+1 XE-133 7.00 E+1 XE-135 1.00 E+1 Revised values entered on Date/ Time Signature Original values re-entered on Date/ Time Signature I

i l

1 l

I l

[~'\ j

's~s _ _ .

FORM TITLE: FORM NO. REV.

ISOTOPIC DISTRIBUTION DOCUMENTATION WORKSHEET 1904.002F 02843-0 -I l

1

ML20206J802

Contents

Text

SUBJECT:

3.0 DESCRIPTION

4.0 REFERENCES

3.0 DESCRIPTION

4.0 REFERENCES

4.1 REFERENCES

4.2 REFERENCES

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

SUMMARY

SUMMARY

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ML20206J802

Text

SUBJECT:

3.0 DESCRIPTION

4.0 REFERENCES

3.0 DESCRIPTION

4.0 REFERENCES

4.1 REFERENCES

4.2 REFERENCES

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

O. PROCEDURE

SUMMARY

SUMMARY

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