ML20005A794

Central Files Version of Revisions to Emergency Plan Supporting Procedures,Consistig of Revision 113 to Index & Revised Administrative Procedure AD 1827.12, Protective Action Guidelines.

ML20005A794
Person / Time
Site:	Davis Besse
Issue date:	06/25/1981
From:	Briden D, Doyel C, Green W TOLEDO EDISON CO.
To:
Shared Package
ML20005A792	List: ML20005A791 ML20005A794
References
PROC-810625, NUDOCS 8107010272
Download: ML20005A794 (17)

Text

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TI'E TOLEDO EDISON COMPANY 9 .

DAVIS-BESSE NUCLEAR POWER STATION.

EMERGENCY PLAN SUPPORTING PROCEDLTES REVISION INDEX I

PAGE. REVISION PROCEDURES REVISION TEMPORARY MODIFICATIONS 8 T-5465 , T5483 i 5 HP 1602.01 HP 1604.01 2 AD 1827.01 2 AD 1827.02 7 AD 1827.03 1 AD'1827.04 1 AD 1827.05 2 AD 1827.06 1 AD 1827.07 2 AD 1827.08 1 AD 18?7.09 1 I AD 1827.10 AD 1827.11 AD 1827.12 7

2 6

AD 1827.13 2 I AD 1827.14 AD 1827.15 1

1 AD 1827.16 1 AD 1827.17 1 AD 1850.04 1 AD 1850.05 4 .

ADMINISTRAT'IVE MEMORANDUMS _

REVISION No. 37 - ECS Pager and Telephone Numbers 21 No. 38 - First Aid Team 10 No. 39 - Fire Brigade 10 No. 41 - Emergency Duty Officer (EDO) 18 No. 42 - Radiation Monitoring Teams (RMT) 12 ,

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'evision 113 June 1981 81e702027z .

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'AD 1827.12 7^3 Davis-Besse Nucicar Feuer Station Unit No. 1 Administrative Procedure AD 1827 12 Protective Action Guidelines f l0 ( [f0 'h UD ..nll On ,. II . .n .U Record of Approval and Changes Prcpared by C. Doyel/W. Green 2/23/7(i Date Submitted by A Ld. Rf M 3/11/76 p Sesdon llend Date Recomended by I bate

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AD 1827.12.6

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1. PURPOSE To define a specific set of guidelines to be followed in determin-ing protective actions to be taken in the event of emergencies involving radioactivity releases at the Davis-Besse Nuclear Power Station (DBNPS).

2. REFERENCES 2.1 10 CFR 20, Standards for Protection Against Radiation 2.2 10 CFR 100, Reactor Site Criteria 6 2.3 USAEC TID-14844, calculation of Distance Factors for Power and Test Reactor Sites 2.4 AD 1808.00, Industrial Security Plan 2.5 Davis-Besse Nuclear Power Station Emergency Plan 2.6 AD 1827.10, Emergency Off-Site Dose Estimates 2.7 SAND 77-1725, Public Protection Strategies for Potential

N Nuclear Reactor Accidents - Sheltering Concepts with

) Existing Public and Private Structures 2.8 EPA Guidelines - September 1975, EPA-520/1-75-001 2.9 U.S. Food and Drug Administration, Federal Register, Vol.

43, No. 242, Dec. 15, 1978 2.10 Reg Guide 1.109, Calculation of Annual Doses to Man from Routine Releases of Reactor Effluents for the purpose of Evaluating Compliance with 10 CFR Part 50 Appendix I

3. DEFINITIONS 6 3.1 Decision Dose s

That value of projected thyroid dose above which evacua-tion is beneficial.

3.2 Evacuation Dose That dose that a potential evacuee would receive if he were openly exposed during the evacuation.

3.3 Evacuation Exposure Pe;~od 1

The period during which the evacuee is exposed to the

((N l

,) radioactive plume. I

I 2 AD 1827.12.6 6 3.4 Off-Site The area outside the Owrer Controlled Area as defined in AD 1808.00, Industrial lecurity Plan.

3.5 Projected Exposure Time That period of time in which the population surrounding DBNPS will be exposed to radiation as a result of an accidental airborne radioactive release. Projected Exposure Time starts when the airborne radioactivity released crosses the Owner Controlled Area Boundary and ends when radiation leve's off-site return to normal.

3.6 Sheltering Dose That dose that an individual would receive if he were to remain within a shelter having ventilation control during the passage of the plume. The method of calculating the sheltering dose is significantly different for the whole body and thyroid dose. This is because a ventilation controlled shelter, i.e. door, windows and ventilation shut, provides thyroid protection for only two bours.

Af ter two hours the inhibitant receives the full thyroid dose. For the whole body exposure there is no limit on the res' dent's time in the shelter.

4. RESPONSIBILITIES 4.1 In the event an emergency is declared at DBNPS that involves th e release of radioactivity or radiation, the Emergea" ,uty Officer (EDO) and his assisting personnel shall use the calculating methods found in AD 1827.10, Emergency Off-Site Dose Estimates, to calculate the instantaneous radiation exposure rates for various off-site locations. (In the even,t of an emergency during off-normal hours, this calculation is performed by the Shif t Supervisor while acting as EDO until such time as 6 he is relieved by the EDO.) The results of these cal-t culations shall be utilized as specified in Section 6.

l for evacuation and shelter recommendations, and compared l with the guidelines given in Sections 5. and 7. to deter-l mine the proper protective actions required to protect the health and safety of Station personnel and the gen-eral public. The EDO shall then implement those actions for Station personnel and communicate the recommended off-site actions to the Ottawa County Sheriff's Depart-l ment (or the State and County Emergency Operations i Centers if they have been activated).

/' 4.2 In order to simplify evacuation instructions for the I

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! i 3 AD 1827.12.6 V

6 public, evacuation " subareas" (see Figure 1) have been established by municipal and geographical boundaries.

When making evacuation decisions in an emergency situa-tion, the EDO shall consider the time available (based on plume travel speed) to evacuate the affected subarea (s),

in comparison to the estimated evacuation times as given in Table 1. The data sheets used in Section 6. assist in this process.

5. PROTECTIVE ACTION GUlDELINES 5.1 Recommended Protective Actions to avoid whole body and thyroid dose from exposure to a gaseous plume: .

Projected Dose (Rem) to the Population Recommendcd Actions (,) Comments Whole body Previously

<1 Noplannyg)protactive actions. Issue an recominended Thyroid <5 advisory to seek protective shelter and await actions may further instructions. be recon-Monitor environmental sidered or radiation levels, terminated.

(T Whole body 1 to <5 Seek shelter as a min- If con-imum. Consider evacu- straints ation. Evacuate unless exists, Thyroid 5 to <25 constraints make it special impractical. Monitor considera-environmental radia- should be tion levels. Control given for access. evacuation of children and preg-nant women.

Whole body 5 and above Conduct mandatory Seeking evacuation. Monitor shelter environmental radia- would be an Thyroid 25 and above tion levels and adjust alternative area for mandatory if ev.cua-evacuation based on tion were these levels. not immedi-Control access. ately pos-sible.

(* These actions are recommended for planntag purposes.

Protective action decisions at the time of the incident must take existing conditions into consideration.

/N (b) At the time of the incident, officials may implement s

l l

4 AD 1827.12.4 low-impact protection actions in keeping with the 4 principle of maintaining radiation exposures as low as reasonably achievable.

5.2 Guidelines for protection against ingestion of contamina-tion:

I. Ground Contamination A. Action Levels

1. Projected whole body dose above the ground 21 rem

2. Ground Contamination levels 22000 uCi/m at t = 1 hr post-accident

3. Exposure rete 212 mR/Hr at I meter above ground at t = 1 hr post-accident B. Recommended Protective Actions

1. Evacuation of a.fected areas

2. Restriction of entry to contaminated aff-site

. areas until radiation level has decreased to State approved levels II. Food and Water Contamination A. Action Levels Concentration in Milk or Water (0.5 (5 rem WB rem WB or bone: or bone: Total Intake 1.5 tem 15 rem via all Pasture l

l thyroid) thyroid) Food & Water Grass Preventive Emergency Pathways (Fresh Weight) j l Level Level Preventive Emergency Preventive Emergency l Nuclide* _

(uci/1) (uCi/1) (uCi) (uci) (uci/kg) (uCi/kg) 1-131 (thyroid) 0.012 0.12 0.09 0.9 0.27 2.7 l

l

• If other nuclides are present, Reg. Guide 1.109 will be used to calculate ahe dose to the critical orga0(s). Infants are the critical segment of the population O

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e-'s.) 5 AD 1827.12.6 i V

Concentration in Milk or Water (0.5 (5 rem WB rem WB or bone: or bone: Total Intake 1.5 rem 15 ren via all Pasture thyroid) thyroijl Food & Water Grass Preventive Emergency Pathways (Fresh Weight)

Level Level Preventive Emergency Preventive Emergency Nuclide* (uci/11 (uCi/h) (uC,i) (uCi) _, (uCi/kg) (uCi/kg)

Cs-137 (Whole Body) 0.34 3.4 7.0 70 3.5 35 Sr-90 6 (bone) 0.007 0.08 0.2 2.0 0.7 7.0 Sr-89 (bone) 0.13 1.3 2.6 26 13 130 B. Recommended Protective Actions P::eventiv,e Emergency

1. Removal of lactating Isolate food and water g dairy cows from con- from its introduction

' ) taminated pasture and substitution of uncon-into commerce after considering:

taminated stored feed.

2. Substitute source of a. availability of uncontaminated water. other possible

3. Withhold contaminated actions; milk from market to b. importance of par-allow radioactive decay. ticular food in

'4 . Divert fluid milk to nutrition; production of dry whole c. time and effort to milk, butter, etc. take action;

d. availability of other foods.

5.3 Representative shielding factors from gamma cloud source:

Structure or Location Shielding Factor ,) Representative Range Outside 1.0 --

Vehicles 1.0 --

Wood-frame house ( ) 0.9 --

I (no basement)

O b

6 AD 1827.12.4 Structure cr, Location Shielding Factor (a) Representative Range 4

Basement of wood house 0.6 0.1 to 0.7(C)

C)

Masonry House (no base- 0.6 0.4 to 0.7 ment)

Basement of masonry house 0.4 0.1 to 0.5(#)

Large office or indus- 0.2 0.1 to 0.3(c, O trial building

(*} The radio of the dose received inside the structure to the dose that would be received outside the structure.

(b) A wood frame hot:se with brick or stone veneer is approx-imately equivalent to a masonry house for shielding pur-poses.

(C) This range is mainly due to different wall materials and different geometries.

() The shielding factor depends on where the personnel are located within the building (e.g., the basement or an inside room).

5.4 Selected shielding factors for airborne radionuclides:

Wood house, no basement 0.9 Wood house, basement 0.6 Brick house, no basement 0.6 Brick house, basement 0.4 Large office or industrial building 0.2 Outside 1.0 5.5 Representative shielding factors for surface deposited radionuclides:

Representative Representative Structure or Location Shielding Factor Range 1 m above an infinite 1.00 --

smooth surface 1 m above ordinary ground 0.70 0.47-0.85 3

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7 AD 1827.12.6 (v )

Representative Structure or Location Shielding Factor (*) Representative Range 1 m above center of 50-f t 0.55 0.4-0.6 roadways, 50% decontam-inated Cars on 50-ft road:

Road fully contaminated 0.5 0.4-0.7 Road 50% decontaminated 0.5 0.4-0.6 Road fully decontaminated 0.25 0.2-0.5 Trains 0.40 0.3-0.5 One and two-story wood- 0.4 f 0.2-0.5

. frame house (no basemant)

One and two-story block 0.2( } 0.04-0.40 and brick house (no base-ment)

House basement, one or two 0.1(b) 0.03-0.15 walls fully exposed:

,Q One story, less than 2 0.05(b) 0.03-0.7

(/ f t of basement, walls exposed g)

Two stories, less than 2 0.03 0.02-0.05 ft of basement, walls exposed Three- or four-story structurea, 5000 to 10,000 ft' per floor:

First and second floors: 0.05(b) 0.01-0.08 Basement 0.01(b) 0.001-0.07 Miltistory 3tructures,

>10,000 ft per floor:

Upper floors 0.01(b) 0.001-0.02 Basement 0.005(b)- 0.001-0.015

(*) The ratic of dose received inside the structure to the dose that would be received outside the ctructure.

(b) Away from doors and windows.

6 5.6 Small Children and Pregnant Women Any time the projected whole body dose is expected to exceed 500 mrem or the projected thyroid dose is expected to exceed 1.5 rem, advise the Ottawa County Sheriff's v

8 AD 1827.12.6 6 Department to conduct an evacuation in the area of expo-sure of families in which there are pregnant women or small children.

5.7 Distribution of Potassium Iodide Tables

1. The EDO will direct Station personnel to take a KI tabletif,(a}5the known iodine concentration will exceed 1 x 10 uCi/cc for greater than one hour, or (b) the total known dose to an adult thyroid will exceed 10 rems.

2. Base the distribution of KI on actual thyroid doses, not projected doses. KI is 90% effective if admin-istered within one hour af ter the uptake, and 50%

effective if administered within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> after uptake.

3. Call Radiation Management Corporation if KI is administered for further directions regarding usage.

5.8 General Population 6 Protective actions should be recommended as developed by Data Sheet 1 and 2. Additional guidance is as follows:

EXAMPLES OF ,.CTIONS ACCIDENT PHASE EXPOSURE PATHWAYS TO BE RECOMMENDED Inhalation of Evacuation, shelter, EMERGENCY gases, radio- access control, res-PilASE1 iodine, or par- piratory protection, (0.5 to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />)* ticulate prophylaxis (thyroid protection)

Direct whole body Evacuation, shelter, exposure access control Ingestion of Take cows off pas-milk ture, prevent cows from drinking sur-face water, discard contaminated milk, l

I or divert to stored products such as cheese 1 Emergency phase - Time period of major release and subsequent plume exposure.

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D EXAMPLES OF ACTIONS ACCIDENT PHASE EXPOSURE PATHWAYS TO BE RECOMMENDED INTERMEDIATE Ingestion of Wash all produce, or PHASE 2 fruits and impound produce, vegetables delay harvest until .

approved, substitute uncentaminated pro-  ;

duce Ingestion of Cut off contaminated water supplies, substitute from other sources, filter, demineralize ,

(24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to Whole body expo- Relocation, decon-30 days)* sure and inhala- tamination, fixing tion of contamination, deep plowing Ingestion of food Decontamination, and water con- condemnation, or taminated from destruction of food; LONG TERM *he soil either deep plowing, con- I PHASE 3 by resaspension demnation, or al-or uptake ternate use of land through roots g Whole body expo- Relocation, access sure from deposi- control, decontam-(over 30 days)* tion material or ination, fixing of inhalation of re- contamination, deep suspended plowing material 2 Intermediate phase - Time period of moderate con-tinuous release with plume exposure and contamination of environment.

3 Long Term Phase - Recovery period.

• " Typical" Post-accident time periods.

6. PROCEDURE  ;

6.1 Whole Body Dose 6 Complete Data Sheet 1.

6.2 Thyroid Dose i

Complete bata Sheet 2.

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10 AD 1827.12.6 DATA SHEET 1 Evacuation vs Shelter Decision Algorithm For Whole Body Exposure

1. Evacuation Subarca from Figure 1

2. Approximate Distance to Population of Interest (1, 2, 5, or 10 miles) miles NOTE: Use the furthest distance in which the projected exposure levels calculated in AD 1827.10 are above the Protective Action Guidelines given in Section 5.

3. Calculate Whole Body Dose Rate:

(D=MR/HR from Step 14, Data Sheet 1 of AD 1827.10, Emergency Off-site Dose Rate Estimate)= mR/HR

4. Release Duration (If not known assume 10 hrs.) hours

5. Projected dose = dose rate x duration = Items 3 x 4 = REM 1000 1000

6. Wind Speed MPH Distance (item 2)

7. Plume Travel Time = Wind Speed (item 5) = hours

8. Time since, or till, beginning of release.

a. If release has begun:

Release has been in progress hours

b. If release will begin later:

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Release will start in hours 3

9. Time till exposure begins:

a. If release has begun:

Time = Item 7 - Item 8a = hours NOTE: Show minus sign in answer if Item 8a is greater than Item 7.

b. If release will begin later:

Time = Item 7 + Item 8b = hours

10. F,vacuation We=+her Conditions:

Normal Adverse Severe (Circle One) k I

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l 1. 11 AD 1827.12.6 k_/

s i DATA SHEET 1 (Continued)

11. Use information from items 1 and 10 to get Estimated Evacuation Time from Table 1. hours

12. Exposure Time:

Item 11 - Item 9 = hours NOTE: If Item 9 is negative, keep in mind that minus a negative number gives a positive result. If Item 9 is larger than Item 11, enter zero hours.

13. Evacuation Exposure Period (EEP):

Take the smaller of Exposure Time (Item 12) or Release Duration (Item 4) hours

14. Projected Dose (Item 5) REM

15. Evacuation Dose = EEP hours (Item 13) x Dose Rate REM (Item 3) =

16. Sheltering Dose =

Projected Dose x Structure Shielding Factor (from Og 5.3) = REM

\j 17. Using the above information and following table, determine the protective actions to be recommended:

IF THEN

a. Projected Dose less than 1 rem a. NO ACTION

b. Sheltering Dose less than 5 rem b. SHELTER

c. Sheltering Dose greater than 5 c. EVACUATE rem, and Evacuation Dose less ,

than Sheltering Dose

d. Sheltering Dose greater than 5 rem d. SHELTER and Evacuation Dose greater than or equal to Shelter Dose i

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C TABLE 1 Evacuation Time Estimates Land Adverse Severe **

Sub-Areas Population

• Normal _

1 2,775 2 hr. 55 min. 4 hr. 10 min.

823 15-20 hr.

823 2 2,675 3 hr. 5 min. 4 hr. 50 min.

861 30-40 hr.

861 3 10,717 3 hr. 35 min. 6 hr. 30 min.

3,242 35-45 hr.

3,242 4 608 2 hr. 50 min. 4 hr. 15 min.

608 10-15 br.

608 5 4,940 3 hr. 30 min. 4 hr. 30 min.

4,940 40-45 br.

'^' 4,940

4,940 3 hr. 30 min.

6 5 br. 10 min.

1,506 30-40 hr.

1,506 1,865 4 hr.

7 6 hr. 25 min.

1,795 50-60 hr.

1,795 TOTAL EPZ 28,484 5 br. 15 min.

10 hr. 55 min.

13,775 75-100 hr.

13,775 Lake Adverse Severe Boaters Normal Sub-Areas 4 hr. N/A N/A 8 thru 13 Varies Special Adverse Severe Population Normal Case _ 4 hr. 45 min.

10,328

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' Port Clinton 6 hr.

7,229 24-30 hr.

7,229

• Population varies due to location and transient resident variations due l to season and unfavorable weather conditions.

• • Time ranges are provided due to the uncertain nature of severe weather k f

() conditions (e.g. , during a severe snow fall or blizzard, the time iit d). ta es

\) to evacuate can vary depending on the direction and speed of the w n 1

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4 14 AD 1827.12.6 DATA SHEET 2 Evacuation vs Shelter Decision Guide For Thyroid Dose

1. Evacuation subarca from Figure 1

2. Complete Data Sheet 1

3. Release Duration from Data Sneet 1, Item 4 (If not known assume 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />) hours

4. Evacuation Exposure Period (EEP) from Data Sheet 1, Item 13 hours

5. Calculated Thyroid Dose Rate (Step 12, Data Sheet 2, AD 1827.10) mR/HR

6. Projected Thyroid Dose = Item 3 x Item 5 =

1000 REM

. 7. Decision Dose is that value of Projected Thyroid Dose abovi which evacuation is beneficial. The Decision Dose depends on the Release Duration as follows:

Release Duration Decision Dose (hours) (rem) 2 75 3 45 4 38 5 34 6 32 8 30 12 28 24 27 above 24 25 Decision Dose = REM i 8. Using the above information and following table, determine the protective actions to be

( recommended:

f IF THEN

a. Projected Thyroid Dose less than a. NO ACTION 5 rem O

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i 15 AD 1827.12.6

~ gd DATA SHEET 2 (Continued)

IF THEN

b. Projected Thyroid Dose less than b. SHELTER

• FOR 25 rem CHILDREN AND WOMEN OF CHILD-

! BEARING AGE

c. Projected Thyroid Dose greater than c. SHELTER

• 25 rem, but less than the Decision Dose

d. Projected Thyroid Dose greater than d. Perform action Decision Dose, then as follows:

1. If EEP less than Release 1. EVACUATE Duration

2. If EEP equal to Release 2. SHELTER

• i Duration

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• SHELTER is to be with VENTILATION CONTROLLED.

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1 END

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