Implementation of the 

Reconstruction Ru

42 CFR Part 82

James W. Neton, Ph.D., C

Technical Program Mana

Office of Compensation Analysis a

National Institute for Occupationa

Health
EEOICPA Requiremen

Dose Reconstructio

Section 3623 (d):Establish by regulation methods 

arriving at reasonable estimat

radiation doses received ... by 

the following employees:
EEOICPA Requirements fo

Reconstruction (continu

(A) An employee who was not moni

exposure to radiation at such fac

(B) An employee who was monitore

inadequately for exposure to rad

such facility.

(C) An employee whose records of e

radiation at such facility are miss

incomplete. 
Dose Reconstruction P

Receive Claim

Review Data

Conduct Interview

Conduct Dose Reconstruc

Request Data from DOE

CATI Report 

to Claimant

Draft Dose 

Reconstruction

Report to Claimant

Receive Signed 

OCAS-1

Closeout In
Sources of Informatio

Site Profile Data

Individual Dosimetry

& Bioassay Data Data 

Dose R

Dose Reconstruction

Interview

Cancer and Employment

Information from Claimant
Computer Assisted Telephone 

(CATI)

• Uses standard scripts

– Can be viewed on OCAS website

• Approved by the Office of Managem

Budget

• Average interview ~ 1 hour• Range from 20 minutes to >4 hours• Provisions for secure “Q cleared” in• Interview recommended, but not re
Compensation vs. Regu

Dose

• Compensation dose evaluation li

period of covered employment

• Includes internal, external and so

occupationally acquired medical exposure

• Annual Dose required for PC est• Committed Effective Dose Equiva

not applicable
Compensation vs. Regu

Dose (cont.)

• For external exposures, concept 

dose equivalent not necessarily a

• Undetected dose is an important • Uncertainty distributions can be u• Can take advantage of recent sc

developments
Technical Approac

• Evaluate all doses of record for d

shortcomings

– Assess capability of external dosim

over time

– Assess quality of radiochemical tec

bioassay samples

• Evaluate potential for undetected 

– Missed dose for external exposure 

LOD/2

– Minimum detectable internal dose b

bioassay program capability
• Use recommendations established by n

international organizations

– ICRP 66 Lung Model for inhalation e– More recent ICRP recycling models 

internal dose estimates

– ICRP 74 used for external dose eval

• Preferentially use individual monitoring 

available and of sufficient quality

• As necessary, use area dosimeters, rad

and air sampling data to augment indivimonitoring data

• If no individual monitoring data, use ava

source term, etc.

Technical Approach (
Examples of Information 

• Claimant interviews• External dosimeter 

readings

• Pocket ionization 

chamber data

• Bioassay sample 

results

• In Vivo exam results• Incident investigation 

reports

• Nasal smear results• External contamination 

measurements

• Surface co

surveys

• General a

samples

• Area radia

results

• Fixed loca

dosimeter 

• Breathing 

sample re

• Source te

characteri

• General p

descriptio
Processing Strateg

• Start conservatively simple using 

monitoring data

• Perform initial evaluation using w

assumptions

• If case has a low estimated POC

reconstruction is complete

• If not, perform more detailed ana
Determine organ of interest and most 

probable mode of exposure. Perform 

dose evaluation using worst case 

assumptions

Per

c

m

High 

probability?

Perform dose evaluation using a 

conservatively low estimate

Perform dose evaluation using

conservatively low estimate for the other 

mode of irradiation. Combine both doses.

Low 

probability?

Pe

Yes

No

No

No

Yes

Dose Reconstruction Flow Diagr
Example IREP Input Spreadsh

PERSONAL INFORMATION

Claimant Name Claim # Claimant SSN DOL Claim Center Gender Birth Ye

Janey J. Lowe 000002-DE 222-22-2222 Washington D.C. Female 1955 

CLAIMANT CANCER DIAGNOSES

Primary Cancer #1 Primary Cancer #2 Primary Cancer #3Secondary Cancer #1Secondary Ca

Cancer Type Lung N/A N/A N/A N/A Date of Daignosis 1985 N/A N/A N/A N/A EXPOSURE INFORMATION

Number of exposures

3

Exposure # Exposure Year Exposure Rate Radiation Type

Dose Distribution Typ

e Paramete

1 1965 chronic electrons Lognormal 4.000 2 1966 chronic electrons Lognormal 2.000 3 1967 acute electrons (tritium) Triangular 1.000 4 1970 chronic electrons Lognormal 2.000 5 1970 chronic electrons Lognormal 2.000 6 1970 chronic electrons Lognormal 2.000 7 1970 chronic electrons Lognormal 2.000 8 1970 chronic electrons Lognormal 2.000 9 1970 chronic electrons Lognormal 2.000 

10 1970 chronic electrons Lognormal 2.000 11 1970 chronic electrons Lognormal 2.000 
Dose Reconstruction R

• Cover Page• Introduction• Dose Reconstruction 

Overview

• Information Used• Personal Background 

Information

• Dose Estimate• Summary• References• IREP Input as an 

Attachment
Additional Informat

• Contact the NIOSH Office of 

Compensation Analysis and Sup(OCAS) at 800-356-4674 or 5134498 

• Visit our website at:

www.cdc.gov/niosh/ocas

• E-mail us at ocas@cdc.gov