ML20080G093

Evaluation of Nuclear Decommissioning Projects Summary Report North Carolina State University Research and Training Reactor

ML20080G093
Person / Time
Site:	North Carolina State University
Issue date:	08/31/1983
From:	Link B, Miller R UNITED NUCLEAR CORP. (SUBS. OF UNC, INC.)
To:	NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
References
CON-FIN-B-7568 NUREG-CR-3370, NUDOCS 8309200009
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NUREG/CR-3370 e

' Evaluation of Nuclear Facility Decommissioning Projects 1

Summary Report North Carolina State University R: search and Training Reactor Prepared by B. W. Link, R. L. Miller UNC Nuclear Industries l

Prcp: red for U.S. Nuclear Regulatory l

C:mmission

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NOTICE This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, or any of their employees, makes any warranty, expressed or implied, cr assumes any legal liability of re-I sponsibility for any third party's use, or the results of such use, of any informatie product or process disclosed in this report, or represents that its use by such third party would not infringe privately owned rights.

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- NUREG/CR-3370 1D Evaluation of Nuclear Facility Decommissioning Projects Summary Report North Carolina State University Research and Training Reactor M;nuscript Completed: June 1983 Dita Published: August 1983 Prepared by B. W. Link, R. L. Miller UNC Nuclear Industries Decommissioning Programs Department Rich!Ind, WA 99352 Pr: pared for Division of Engineering Technology Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission i

W:chington, D.C. 20555 NRC FIN B7568

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EVALUATION OF NUCLEAR FACILITY'DECOP9tISSIONING PROJECTS ~

SUt9tARY REPORT NORTH CAROLINA STATE UNIVERSITY RESEARCH AND TRAINING REACTOR'

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Reviewed by DOE-RL:

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J. D. White, Director, Surplus Facilities Date Management-Program Office Approved by UNC:

k 1 l'l D T. E. Dabrowski, Director, Decommissioning i

Da ;e Programs Department Approved by NRC:

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' 7/2 >/S3

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D. W. Reisenweaver, NRC Program Manager Date 4

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ABSTRACT.-

Thisdocument: summarize's'fihormationfromthedecommissioning'oftheNCSUR-3

.1(R-3),- al-10 KWt university research and training reactor. The decommission '

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-ing data-were placed in a computerized information retrieval / manipulation system which permits: future utilization of this information'in: pre-decom.

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missioning activities with other university reactors of-similar; design.' -The information_is presented both in seme detail in:its computeh otsput form and-

. also as a~ manually: assembled-summarization which highlights the more

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significant, aspects of the1 decommissioning project. Decommissioning datai

-- from a generic. study, NUREG/CR 1756, " Technology,- Safety and Costs of -

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. Decommissioning Nuclear Research and Test Reactors," and the~ decommissioning of the Ames Laboratory Research-Reactor '(ALRR), a 5 Mt-research reactor,-~is also included for. comparison.

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CONTENTS

.P_ age

1.0 INTRODUCTION

1 1.1

' Acronyms - Definitions 1

2.0 FACILITY

SUMMARY

REPORT 3

2.1.

Facility Description 3

2.2 - Summary of Costs and Radioactive Waste 3

2.3 Comparisons of Cost' Items 4-

'2.3.1 Dollar Costs 4

2.3.2. Man-Rem Costs 4

3.0 -DESCRIPTION OF COMPUTER REPORTS 5

3.1 General Information 5

3.2 Decommissioning Code Table /Index 5

3.3 Significant Event Report 5

3.4 Radionuclide Inventory 6-

3.5 Project Cost / Exposure Report 6

3.6 Dose Rate and Contamination Report 6

3.7 Project Labor' Report 6

3.8 ALARA Report 6

3.9 Shipment Report 6

3.10 Disposal Costs 7

3.11 Surveillance Report 7

3.12 Public Dose Rate 7

4.0 COST ADJUSTMENTS 8

5.0 ~ FINAL SITE CONDITION 10-5.1 Criteria 10

. 5.2 Final Site Condition 10 v

CONTENTS ~. continued-

'.Page 5.2.1 NCSU Final. Site Survey

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5.2.? Confirmatory NRC Surveys

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6.0 CONCLUSION

S ANDTLESSONS LEARNED 11 6.1

~As-built Drawings ~

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6.2 Modifications'to the-Structure ill

6.3 Disassenibly Tools

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'6.4 Labor Productivity '

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12 6.5

' Prepare Decommissioning' Plan and Maintain.it Up-to-Date.

12.

6. 6" Use;Existi~ng Staff =

2124 -

6.7 Dust Control 12.

6.8 Keep the Nuclear Regulatory Commission Infonned

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7.0 : COMPUTER REPORTS'

. General:Information

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Decomissioning -Code Table /Index.

17 Significant' Event' Report.

19-RadionuclIde. Inventory 71 Project. Cost / Exposure 22

.i Dose Rate =

23 Project Labor.

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ALARA Report

-28 Shipn.ent Report

29 Disposal ~ Costs 30.

-Surveillance Report 31

' Public. Dose Report-

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1.0 INTRODUCTION

This document summarizes the available information concerning the decomissioning of the NCSUR-3 (R-3) reactor located at North Carolina State University. This small research and training reactor is similar to a number of others presently in use ur in a shutdown status throughout the U.S.

The decision was made to decomission the subject reactor in the DECON mode in order to free the occupied space for other university-associated activities.

The decomissioning data were assembled in a form that~ permitted its input

.i into a computerized data-handling system. The computer program used is a flexible data accumulation, manipulation and retrieval system which can provide:

e Greater accuracy in cost, labor and radiation exposure estimates e Greater awareness of methods for keeping radiation exposures ALARA e Guidance in estimating time requirements for decommissioning activites e Better prediction of radiation and contamination levels e Identification of special areas of difficulty in the decommissioning process.

As the amount of data fry.n actual decommissioning projects increases,-the value of the Decomissioning Data System as a decommissioning aid is enhanced. Some comparison information with reference research and test reactors is included in Section 2.0.

1.' l Acronyms - Abbreviations - Definitions Definitions of Decommissioning Alternatives DECON - to imediately remove all radioactive material to~ permit unrestricted release of the property.

SAFSTOR - to fix and maintain property so that risk to safety is acceptable for period of storage followed by decontamination and/or decay to an unrestricted level.

ENTOMB-- to encase and maintain property in a strong' and structurally long-lived material (e.g., concrete) to assure retention until radioactivity decays to an unrestricted level.

p Acronyms - Abbreviations -

^A/C-

- Activated or Contaminated AEC Atomic Energy Commission ALARA i As Low As Reasonably Achievable BARN Barnwell, S. Carolina (wae.te disposal site)

BIO Biological C1 Curie CS Carbon Steel Cu'Ft Cubic Feet DDS Decommissioning Data System DNA Data Not Available D0-Dismantling Operations DOE Department of Energy DOS RED FCT Dose Reduction Factor DPM Disintegrations per Minute DR Drawings EPA Engineering, P1anning, Administration HP Health Physics HP/QA

. Health Physics / Quality Assurance HVAC Heating, Ventilation, Air Conditioning HX Heat Exchanger KWt Kilowatts Thennal Licensee North Carolina State University

. MAP PER

_ Maintain, Prepare, and Produce _ Executive R,eports mwd Megawatt Days MWdt Megawatt Days Thennal N/A Not Applicable NCSU North Carolina State University NRC U.S. Nuclear Regulatory Commission NRP Nuclear Reactor Program.

RICH Richland U.S. Ecology Disposal Site SPEC NO Specification Number SS Stainless Steel

'SYS/ COMP System Component TRIP LEN' Trip Length TYP Type t

UNC UNC Nuclear Industries, Operations-Division PR Mi cro-roentgen I

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.2.0 FACILITYSUMARYREPORTl The purpose for th'is section is two-fold:

(1) to provide the' reader with a condensed overview of the decomissioning of ~ a university-type. reactor,-

similar to several U.S reactors which will-eventually be decommissioned, and (2) to present a-brief comparison between this_ decommissioning project and

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the ge'neric decommissioning' study for a reference 1 Wt research reactor (RRR)~and the.

~ReactorE(ALRR)jecommis'sioning experience at-the kes Laboratory Research

, a.5 MWt research reactor.

Cost information for RRR and ALRR was in 1981 and 1980 dollars, respectively, while comparative R-3 information is in 1983 dollars. To

' allow a comparision, all costs are converted to 1983 dollars using the Normalized Cost Escalation table in section 4.0 of this report. The information in this section is a sumary of the computer-output information

-in section 7.0.

' 2.1 Facility Description Name: R-3 RRR ALRR NCSU Rearch and Training ~ Reference Research Ames Laboratory-Reactor

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Reactor.

Research Reactor

Location: Raleigh, N.C.

. Oregon St. University-DOE; Corvallis, OR Ames, IA Owner: State of North Carolina Operator: NCSU-OSU

. Ames Laboratory -

Reactor Type: Research & Train. TRIGA-(Pool-Type)

Research (D 0) 2

.0perating Lifetime:

11 years'-

40 yr.T(5%. operating) 12' years Decommissioning Mode:

DECON DECON DECON Power Rating:

10 KWt-1' Et (Steady State).5 Wt Lifetime Power 2.1892 MWdt 740 MWdt 15,200 MWdt Reason for^

Decommissioning: Need eliminated End-of-Life Reduced Funding 2.2 Summary of Costs and Radioactive Waste R-3 RRR ALRR

' Total Decommissioning Cost, 1983 Dollars:

233,700 1,033,000 4,816,000 Personnel. Exposum, Manrem:

- 1.78.

18.3 69.4 Radwaste' Volume, Cu, Ft.:

.1,017' 5,650 40,830 1

Radionuclide Inventory,

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, Curies:

2.28 1,500 6,672 INURES /CR-3336i " Decommissioning Sumary Report, Ames Laboratory Research Reactor *

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2.3? Comparisons of Cost LItems-

- 2.3.1 Dollar Costs-e

. The following. listed Iitems are compared t'o total. dollar costsidjusted to -

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- 1983 for.these. decommissioning projects.

R-3 RRR

.ALRR

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.No!-of 7.Lof $

No. of_ No. of $'

No. of No. of $

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-- Item (Unit)

Units

~Per Unit-Units-Per Unit Units-Per Unit:

1 Radionuclide-InventoryL(C1.) 2.28 102,450.-

'1500 689.-

' 6672 722.

[

- Radwaste;(Cu. Ft.) 1017 230.

5650 183.L 40830

.118.'E Lifetime'Pwr.

-Output (MWdt) 2.1892 106,740 740 1396 15200 317.

Monthly Spending

-Rate 22l 10,620.

8.5 121,500 45-107,010 2.3.2. Man-Rem Costs 1The following ~11sted-items are compared to the total personnel exposure to

- radiation during_ the decommissioning program.

R-3

'RRR ALRR No. cf No. of-No. of

-No. of Units Per No. of Units Per No.- of Units per.

Item (Unit)-

Units Manrem Units-Manrem' Units Manrem i

Radionuclide 11.28

1500 81.97-6672 96.14 Inventory (Cf.). 2.28-Radwaste Volume (Cu. ft.):

1017 571.35 5650 308.74 40830 588.33 Decommissioning Costs ($)

233679-131,280 l'033000 56450 4816000

69400

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3.0 DESCRIPTION

OF COMPUTER REPORTS The reports described below are the basic reports used in the decomissioning data system (DDS). The' descriptions, as presented, are intentionally idealized. - It should be understood that all report functions will not always be utilized, because the available decommissioning information varies from project to project.

In addition to the basic reports, the MAPPER computer program used'as the basis for the DDS provides the ability to produce supplementary reports by manipulating the data available in the basic reports.

3.1 General Information,

This report is a free format input report designed to accommodate descriptive data of any kind. - Entries may be given any title and related to any facility system by a' system component number.

Data are entered in any fonnat on any subject. The report is used to record information that does not fit into any of the report types organized by column.

This includes facility 1ccation, descriptTon, owners, operators, builders, etc. Summary data may also be included where it is not readily derivable from other reports or for convenient reference.

3.2 Decommissioning Code Table /Index This report contains a list of unit items, including facility buildings, systems and system components, and budgetary items, with a corresponding identification number for each unit.

The identification system is used througSout'DDS to relate data to specifically identified units.

This basic report type may be expanded to include tables or indices of other

-kinds related to facility decommissioning. Candidate tables are labor L

category wage rates, shipping company rates, shipping company name codes, disposal site name codes and rates, or archived file tape names.

One of the basic values of this report is the fact that, by utilizing an index which can ultimately be made common to all reactor facilities included in the program, the report can become the intercomparison base for the DDS.

The full utilization of this base will not be possible until an adequate number of facilities are included in the DDS.

3.3 Significant Event Report This report is used to record the f acility's operating history, which in some cases could impact facility decommissioning.

It contains dates, system / component numbers, and event descriptions.

Noteworthy events such as

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construction completion, startup, shutdowns, significant incidents, and-accidents are recorded in this report.

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3.4 'Radionuc1ide' Inventory In inventory of radionuclides present in each facility system will be made

- prior to the start of decommissioning'. The amount of each radionuclide-or its conce'ntration, the measurement. date, and a description of each system's.

material-composition is recorded.. It is-also noted whether a radionuclide present in ta system is the. result' of neutron activation or. contamination.

3.5 - Project Cost / Exposure Report Costs, schedules,_-man-hours, man-rem, both estimated and actual, are listed for each activity specification! number.- :These costs may be broken out on lines having a subactivity specification number. This report is the main respository of cost and exposure information for a decommissioning project.

3.6 _ Dose Rate and-Contamination Report Dose rates at locations throughout each facility are recorded p' rior to decommissioning. Locations relative to a reference map, elevation, system / component number, and type of measurement are recorded for each measurement. lBoth upper and lower limits of dose rates or contamination levels (in disintegrations per minute) are listed.

3.7 ' Project Labor Report Decommissioning labor costs, exposure, and man-weeks for each activity specification are recorded at a to-be-determined frequency. This supplements the project cost / exposure report by providing data on how costs and exposures accumulate over the course of. a decommissioning project.

- 3.8 ALARA Report.

The ALARA report contains records of ALARA efforts by activity specification-number. The affected facility system,-date, cost items. exposure information, and a description of the ALARA effort are listed. This report can be used to calculate by activity specification number or for all activities the total estimated man-rem saved as well as total cost incurred

- through the implementation of the ALARA effort.

3.9 Shipment Report Volumes, weights, and other physical data are recor.ied by waste type for material produced by eact activity specification. These data are listed for each shipment of material from the decommissioning site. Trip lengths and-vehicle dose rates are recorded'in order to calculate public e sposure.-

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i 3.10 Disposal Costs

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The costs associated with each waste disposal shipment are recorded in the Disposal Costs Report. Costs are divided into transportation, burial, and container categories. Costs for each container type on the shipment are also listed..

3.11 Surveillance Report The surveillance report is used to record annual costs and exposures associated with long term surveillance of a decommissioned facility. Under normal conditions a surveillance report would not be included for a facility decommissioned under Mode DECON.

3.12 Public Dose Report The exposure of the public to radiation which results from the decommissioning of nuclear facilities is one criterion which is to be considered during the pre-decommissioning evaluation phase. This report presents an estimate of such exposure information, based on extrapolations of measurement data and numerous assumptions, including both routine and accident conditions.

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4.0 COST ADJUSTMENTS All cost information included in this document is presented in actual dollars _as the charges.were paid through the decommissioning' program. For adjusting costs listed in the computer reports to year of interest, use the inflation rate table below.

Nomalfred Cost Escalation Table Annual Inflation Ra;e

• Year 1970 1971 1972 1973 1974 1975 19 76 19 77 19 78 1979 1980 1981 1982 1983 0.029 1966 0.029 1967 0.042 1968 0.0 54 1969 0.059 1970 1.000 0.043 1971 1.043 1.000 0.033 1972 1.076 1.03 3 1.000 0.062 19 73 1.138 1.095 1.062 1.000 0.110 1974 1.24 8 1.295 1.17 2 1.1 10 1.000 -

0. 0 91 19 75 1.339 1.296 1.263 1.201 1.091 1.000 0.058 1976 1.397 1.354 1.321 -1.259 1.149' 1.058 1.000 0.065 1977 1.462 1.419 1.386 1.324 1.214 1.123 1.065 1.000 0.077 1978 1.53 9 1.496 1.463 1.401 1.291 1.200 1.14 2 1.07 7 1.000 0.113 1979 1.652 1.605 1.576. 514 1.404 1.313 1.255 1.190 1.113 1.000 0.13 5 1980 1.78 7 1.744 1. 71 1 1.64 9 1.539 1.448 1.390 1.325 1.248 1.13 5 1.000 0.104 19 81 1.8 91 1.848 1.815 -1.753 1.643 1.552 1.494'1.429 1.352 1.239 1.104 1.000 0.06I 1982 I.952 1.909 1.876 1.814 1.704 1.613 1.555 1.490 1.413 1.300 1.16 5 1.161 1.000 0.0 50 19 83 - 2.002 1.959 1.926-1.864 1.754'1.663 1.605 1.540 1.463 1.350 1.215 1.111 1.050 1.000 Ex ample: A cost paid in 1971 dollars would increase to a cost of 1.959

. times the original, if paid in '1983 del Mrs.

• Saurce:

Statistical abstract of the United States,1962 Consumer Price Index.

1983 data are interim estimated.

LIn planning for large decommissioning projects which cover long time spans or are scheduled to start at some time in the future, cost estimates should consider the " worth" of current money-and then adjust cost estimates to reflect this consideration. This exercise, referred to as a " time'value cost analysis", considers the year of expenditure, interim surveillance and maintenance costs, major non-routine maintenance costs, and inflation rates.

" Worth" of current money is usually based upon an average yield on stable, non-speculative investments such as long and short-term treasury bills. - A " time value cost analysis" results in a percentage value, referred to as the discount. rate, which is used to discount the ~ cost of a future project to the current " worth" of money. This discount rate includes consideration of financial uncertainties, such as project cost overruns, recovery costs for major accidents, etc.

Example - A discount rate of two percent yields the following table:

Discount Discount Year Factor Year Factor 1

0.9804 6

0.8880 2

0.9612 7

0.8706 3

0.9423 8

0.8513 4

0.9238 9

0.8535 5

0.9057 10 0.8204 i

If project is estimated to cost $10,000 during a time period six years from today, the arount of money presently required to be invested is ($10,000)

(0.8880) or '48,880.

Detailed discussions and suggested assumptions may be found in the following references:

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1.

" Methodology for Establishing Decommissioning Priorities,"

U.S. Department of Energy, Richland '0perations Office, RLO/SFM-82-7, June, 1982.

2.

"The Rate of Discount for Evaluating Public Projects,"

Mikesell, R. f.,1977 American Enterprise Institute for Public Policy Research, Washington, D.C.

3.

" Navigating through' the Interest' Rate Morass:

Some Basic Principles,"

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Santoni, G.'J., and C. C. Stone 1981 Federal Reserve Bank of St. Louis Review, Marcr 1981 Y

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l5.0. FINAL SITE CONDITION

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/5.1:' Criteria-The decommissioning contractor :left_ the R-3 Bay'in an acceptably clean.

condition'on. March 7, 1983. The North Carolina State University Health Physicist then: began the final site survey to' assure thattthe= dismantling work ~had resulted in satisfactory decontamination 'of:the R-3 bay. The

~ Nuclear. Regulatory Comission had required that the _ dose rates at one meter due to the activity of Cs-137, Co-60,'and Eu-152 be less than.25 UR/hr-(5

- pR/hr above the 20 pR/hr background).1. Regulatory Guide-1.86 recommendsthat

'he removable contamination be less-than 100 disintegrations per. minute-per L100: square centimeters. The philosophy of-the NCSU final site survey was to take dose rate surveys.and removable contamination = swipes-of all existing-surfaces in the R-3 Bay at ten -(10); foot intervals to assure satisfactory-

--decontamination to levels below the Regulatory Guide 1.86 recommendation.

5.2 Final Site Condition 5.2.1-.NCSU Final Site Survey All-horizontalfsurfaces were surveyed _~and swipediin the survey..These.

surfaces included the radial trenches, fuel storage bins and the base and-foundation of the R-3 as the contractor left it. 'The beam catchers and :.-

storagelholes in:the wallsi.were'also swiped.

In practice, the ten (10); foot' interval was reduced to eight- (8) f_eet to better fit the geometry of the R-3 l

Bay. The R-3 Bay walls were'also surveyed and swiped up to the level of the F

crane track.-

The dose ~ rate surveys showed that all areas-in the-R-3 Bay were

. decontaminated to a level:of less than 25.pR/hr except the area directly above the concrete which was below the R-3 core.- Thisulocation appeared to measure between 26 and 27-pR/hr with a Ludlum pR/hr meter. All of the swipes taken~showed removable contamination of less than 85'dpm/100 cm2.'

The results of the NCSU HP Final l Site' Survey were incorporated in a letter to the NRC dated March 29, 1983.

5.2.2 Confirmatory NRC Survey The licensee (NCSU) submitted their report of'the final survey of the R-3' reactor: facility for radiation 'and' radioactive material to the Nuclear n

Regulatory. Comission on March 29. 1983.- Residual removable contamination L

levels were far below the limits for release fer' unrestricted use. The survey report -showed that in one area the external. radiation levels at one.

- meter above the floor were 7;to 8 pR/hr'above a background:of 20 pR/hr.

i This location was.one meter above the floor'in the center of the facility below the reactor core locat. ion after approximately le inchas 'of' concrete l'

-were removed. Surveys of the-area in question were made b.) the.NRC wI '

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inspector, utilizing 1-1/2 inch thick steel plat'e to simulate the shielding regained by replacing the removed: concrete and to re-establish the floor level. Subsequent measurements, both with and without the steel plate in place, were less than the required 5 ER/hr. above a background of 20 ER/hr.

T' e assumption is made that replacement of the removed concrete will reduce h

the radiation levels to below those permissible for unrestricted use.

Smear surveys by the NRC inspector'showed removable contamination levels were well below the release limits for unrestricted use. The smears were counted for both alpha and beta / gamma activity at the licensee's facility.

Confirmatory beta measurements were made in the Region II laboratory.

Thirty disintegrations per minute (dpm) per 100 square centimeters (100 cm2) was the highest beta / gamma level. The highest alpha level was 1.9 dpm/100 cm2, The inspector had no further questions or comments.

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6.0 CONCLUSION

S AND LESSONS LEARNED Several lessons were learned from the decommissioning of the R-3 reactor which might be helpful to others. These lessons are sumarized in the following paragraphs.

6.1 As-Built Drawings Throughout the life of the f acility, a complete set' of '"as-built" drawings and manuals should be maintained. Such "as-builts" should include embedments in the structure even though they are no longer used.

In fact, it would be advisable to maintain a set of drawings that shows every permanently installed fixture that must ultimately be removed everi though it is no longer in use.

6.2 Modifications to the Structure l-Any modifications to the structure should consider ultimate dismantling. To L

allow grout or a bonding agent to flow into the crack between otherwise indepenoent concrete strec' es could make them far more difficult to l

remove. Also to reduce d' antling costs, buildings containing large steel structures should have lar e doors or other provisions to allow intact l

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removal of large pieces of equipment.

6.3 Disassembly Tools Disassembly tools should.be cMatae%d in a storage space with controlled eccess.

Special tools may have been designed to ' install certain parts of the structure and components.

If;these tools are seldom used, then they may be -last.

A good example of this were four (4) eye bolts that were used for remcving a several-ton concrete block from the R-3 reactor. Without these eye bolts, it would have been necessary to use a jack hammer to break up the i

- concrete and remove it in pieces. The eye bolts were threaded to match the.

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- threads of an embedment which were non-standard.. Fortunately, a piece of-one'of the~old eye bolts was. located and from that. piece it was possible to remanufacture four (4)~ eye bolts that would: fit-the embedments.

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l 6.4 ? L' abor Productivity

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Labor productivity ~ should take into account orientation time, high turnover rates among' laborers assigned to.a tjob,.and the time' required to suit up to

enter a controlled area.; The_ contractor' hired by NCSU to dismantle the

' concrete ' structure had no experience working his men under the controlled..

conditions required in a nuclear < facility. Consequently, labor productivity-

was.less than predicted.

6.5 Prepare the Decommissioning Plan and Maintain it Up-to-Date The Decommissioning Plan _should be prepared with assistance from the Operation and Maintenance staff 'during the early. years of plant operation.

It should be-reviewed prior to major modifications to-the facility and 4

revised following the modifications.

6.6 Use Existing-Staff Use existing Operations.and Maintenance staff for the initial phase of the

' dismantling. This will-allow the plant staff to compare the condition of the plant.at the time of decommissioning with "as-built" drawings. This l

~ effort should. produce. information that would allow a' contractor to more intelligently prepare a proposal for the decommissioning l work.

4 6.7 ' Dust Control r

' If the concrete structure is to be broken up, dust control must be thoroughly studied.

It is recommended that ths first concrete to be broken c

-up should be non-radioactive. During the first few days of the demolition of the concrete structure of -the R-3 reactor, -fine dust was distribeted throughout a three-story research building.

Decoatanination would have been extremely difficult if this fine dust had been radioactive. Awareness of L

this. problem and the possible ' consequence: of the spread of contamination -

throughout the. building, caused the contractor to. improve the ventilation system for dust control.

_ 6.8 Keep the Nuclear-Regulatory Commission Informed

- The huclear Regulatory Commission has not-yet developed a complete set of guide!1res for the decommissioning of nuclear facilities. Where guidelines do 4xist, they do not refer specifically to research reactors. Discussions with Nuclear Regulatory' Commission personnel'in Bethesda, Maryland and Atlanta, Georgia were most helpful.

4

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MENANffT DAYST 2 1992 MUST OPERAT0tt NC84!

MAJOR SMUTDONNSt 23 MONTMS. 27 MONTHS

~ * - - ~

(SEE SIGNIFICANT EVENTS REPOAT) 7 s==ns.wavns==

nuys. assvn ARCHITECT /ENGINEERI NCSU/NUCLECfht CO.

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SPECI AL t!CENSt s --ANtNSatNT OF OGt#ATING LICENSE TO

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.REFERENCEse REPORTS AND PAPERS CONSTRUCTION /0PERATION

.1.SunnARY HAZARDS REPORT FOR THE NORTM CAROLINA STATE UNIVER$1TT TRAININS'

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.2. PRELIMINARY PROGRESS REPORT ON TNE MCOMM16SIONING OF THE NCSU IOKW RESEARCH"

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.3.DISMi,NTLINS PLAN FOR THE R-3 10KB REACTOR NCSUI RALEIOMe N.C.,

MARCHE 1980

.4.DEconnISSIONtwe OF THE NORTN CAROLINR STATE UNIVERSITT 30KN RESEARCM AND 8 TRAININS REACTORe NCSUI RALEIBMe N.C.e Nov. 17e 1982

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.A. FINAL REPORT ON ttnr DECOnntSSIONTMS OF ThE NC30 10KW RESEARCN AND S TRAININS REACTORe NCSul RALEIGHe N.C.e APRILe 1983

.DEConMIESIONING INFORMATION

.PERSONNE4 RADIATION EXPOSURE e

e - NUM9th 0F PtR99NNEL MONI70REDI-49 ---~

AVERASE DOSE IN MANREMI 0.0371

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TOTAL MANREN USED:

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ALL EIISTING SURFACES MUST MAvt A DOSE RATE AT ONE PETER

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MICRO-R/NR AD0VE NATURAL DACKeROUND. DETERMINED TO DE o

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. e-1 SNUTDOWN DV TO CORROSION LEAR 570304 CONSTRUCTION COMPLETED. R-2 REACTOR. 200 WATT $e N0nOSENEDUS WATER DOILER 381208

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sv=inusa NTITTATVTTORAGE DES!NS.

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.740219 FUEL REMOVED FRon REACTOR TANK AND STORED IN FUEL STORAGE Plf IN FLOOR OF A-3 bAYB SYSTEN DRAINED OF WATERS SAFE STOR-A8E CONTINUES.

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N AME=va s a ss= s wu.*W*ST TO 'PUSSESSTON ONLY' LICLNSEl

' SAFE STORAGE CONTINUES.

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800301 NCSU PREPARES REVISED DISMANTLINS PLAN F0A NRC APPROVALS

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.818215 FIRST RADIDACTIVE WASTE FROM R-3 SN! fred TO DURIAL SROUND-C0dSISYS OF ORAPMITE FR0n TNERn4L COLUnN AND ALL TNREE 4

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4 3203IS Inst-NUCLEAR INDUSTRIES CONTRACT FOR R-3 MCOMMISSIONING DATA COLLECTION AND DOCUMENTATION ANARDED.

FOR DFMOLITION CONTRACT FINALI2ED,

.820401 RE90EST FOR PROPOSAL (RFP)

INCLud!NO UP-TO-DATE DReu! Net.

.320709 DECOMMISSIbMING FUNSING APPROVEDB'RFP MAILED TO PROSPECTIVE DIDDERS.

BIDMR$8 CONFERENCE PELD AT NCSU.

0 320715 4

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.821015 CEROLITION OF R.3 CONCRETE DIOLOGICAL.S.NIEL.D DESINS.

.330214 THIRD SMIPRENT OF RADICACTIVE WASTE CONSISTING OF BIOLOGICAL SNIELD CONCRETE AND REINFONCING DAR ConPLETED.

430307 MnOLITION CONTRACT COMPLETED.

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.t. INTERNAL COSTS ARE TNOSE INCURRED MITHIN TME NCSU SYSTEN 0 EXTERNAL COSTS ARE YMOM INCURRED OUTSIM THE NCSU SYSTEM

.2. DISMANTLING FISURES INCLUDE FUEL SHIPMENT AND REMOVALe AND s ConfRACTED SI9 MANTLING

.3.DENEFITS APPLT TO AIL COST ITEn/ ACTIVITIES. DEPENDINS ON THE AMOUNT OF

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• LEVEL. EACM DOSE RATE POINT WILL DE IDENTIFIEDe

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CON 0.034 RM 9207 FIOURE~1 C

CON 0.015 RM D204 FIOURE 1 -

C CON 0.018 RM D20e

. MOTE - THE FOLLOWING DOSE RATE READINGS WERE TAKEN IN ROOMS PERIPHERAL AND SADJACENT TO THE RE ACTOR ROOM ONE LEVEL A90VE TME REACTOR ROOM FLOOR ttDASEMENT LEVEL).

FIGURE 2 DURLINGTON FIRST N/A CON 0.017 LODDYe RISWT 7 ;.., ;

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6 i"

.1 PAGE NO.

1.

.R-3-DECOsd U.N.C. DECORRISSIONING DATA SYSTEM = PROJECT L ADOR 194F3032

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MEALYN PNYSIC9e 94 S0.69 16799 NOTE 1.

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- - - - - ~ - - ~ - -

DRANING9e DEVELOPMENT 9.45 1644 8

ANs PREPARATION ENGINEERINGs FLANNING

$34.74 53427

-TOTAL 229.19 33614

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.R-3-DECON U.N.C. DEt0MMIS$10NING DATA SYSTEM - ALARA REPORT 192E3010

. DOS.

.WAW# F -,

• ACTIVITY.SYS/ COMP.

. AL AR A. REM. INITIAL, FINAL. RED.

s............................................'.............................................................IPTION e DATE.

ALARA COST ITEM.COS1 S. SAVED. MR/MR. MR/MR.FCT.

ALARA EFFORT DESCR 8 SPEC NO. NUMDER THE FOLLOWING ITEMS CONCERNING APPLICAf f 0N OF THE ALARA PRINCIPAL WERE TAKEN

• "'T FirOW'DECOMMISSTOWfire nsrvu s

.e a yu TTT a t y an int UENERAL'INFORMATIDN REPORT

. UNDER ' REFERENCES',

I. DECOMMISSIONINS INSTRUCTIONS A TOTAL OF FIVE DISTINCT DECOMMISSIONING INSTRUCTIONS. SERE CONSTRUCTED TO PROVIDE THE NECESSART GUIDANCE AND REQUIREMENTS TO ALL EMPLOYEES.

TME FOLLOWTWe T,Mtet T-.inviiiG=i -ni seiUFicat.t? APPtitD TOWARD TME

~.

ALARA COMMITMENT.

A. INSTRUCTION 2

' ENTERING. OCCUPTING AND EXITING THE R-3 DAT DURING DECOMMISSIONING OF THE R-3 REACTOR *.

7 TMC PURP0tt OF-TMttt SPECI AL TWSTRUCTIONS TS TO MAINTAIN THE TOTAL EXCESS RADIAT!DN DOSES (1.E. ADOVE DACKGROUND3 RECEIVED DURING THE DECOMMIS$10NING OF THE R-3 REACTOR AS LOW AS REASONADLT ACh!EVADLE.

IMPLEMENTATION OF THESE INSTRUCTIONS WILL LIMIT THE ENTRANCE OF DECOMMISS-IOMf M3 PERSONNEL INTO THE R-3 DAY TO ONLTI THOSE PRESONS DIRECTLY INVOLVED IN REMOVAL OF REACTOR COMPONENTS AkD MATFRIALS AND SPECIAL VISITORS WHO Ntt9 TO'funct *N TMSFECTTOW-tF Tnt FACTt!TTES (E.S. NRC INSPECTORS OR 007 SIDE CONTRACTORS ENGAGED IN OR PROPOSING TO DE ENGAGED IN THE DECOMMISS10N-I FO ING).

03 D. INSTRUCTION 4 0

' PACKAGING OF WASTE *.

THE CattFUL STFmRATION nW3 Petit A0!WS OF RnDICACT!vt WASTE REMOVED FROM THE R-3 DAT IS NECESSART FOR TME ULTIMATE MEALTH AND.SAFETT OF DECOMMISS-10NING WORKERS AND THE PUBLIC. IN ADDITIONe DOCUMENTATION IS REQUIRED TO ASSURE THAT THE ADOVE ACTIONS ARS CARRIED OUT PROPERLT AND IN ACCORDANCE e

WITM ALL PERTINENT REGULATIONS.

THE PURPOSE OF THIS PROCEDURE IS TO PROVIDE THE GENERAL REQUIREMENTS

~ **.-

AK!r UtTT92WCT WECTSS ARY TO DETERMINE

• TME ST ATUS OF POTENTI ALLT RADIDACTIVE MATERIAL AND TO PACRAGE AND DISPOSE OF SUCH WASTE.

C.

INSTRUCTION S

' REMOVAL OF NON-CONTAMINATED MATERIAL FROM THE R-3 DAT'.

THE PROCEDURES INCLUDED IN TMIS INSTRUCTION ENSURE TMAT SEGREGATION

-. - F R*930* Cit t FROW WOW-RADT0*CT!vt MATERIAL IS COMPLETE. TME INSTRUC-TION CONSISTS OF STEP-DT-STEP PROCEDURES TO DE FOLLOWED IN THE REMOVAL AND DISPOSAL OF NON-RADI0 ACTIVE MATERIAL AFTER ITS SEDRESATION IS COM-PLETED.

2. ALARA INDOCTRINATION PROGRAM

~7 nd 6vnin m un *WD WCStr #ECOnwTSSIONTWS WORKERS iftet Rt90tRED TO PARTIC-IPATE IN AN INDOCTRINATION PROGRAM CONCERNED WITH TME ALARA CONCEPT AND RADICLOGICAL SATETT. THE PROGRAM INCLUDED LECTURE AND WIDEDT APE PRESEN-TATIONSe AND SUCCESSFUL PASSAGE OF A WRITTEN TEST DASED ON THOSE PRESEN-TATIONS.

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.R-3-DECON U.N.C. DECOMMISSIONING DATA SYSTEM - SHIPMENT RFPDAT 194C3024 inar.

.i.

a SMIP.SMIP.LEN

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WASTE

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• DATE.NUM

. RILES.CONYCT.4 PEET, CAS". NAME.

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381215 1 2/41 20 0

0 EU 152 0.0725 SRAPHITE A SOLIB DNA LSA 107.5 13704

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A ALL LSA SROSS NET STEEL RODS NI 63_ 0.674 CONTROL A

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- 920720 2 2741 2.5 - 0 25 0.1 CO 40 2.71E-3

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LSA EU 152 5.9E-3 A

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seasseessssssssssssssesessessessteessssesessteesssesesssssesessassessetesesssssa RADIDACTIVE GUANTITIES SMIPPED 1 0F TOTAL

____w______

- - - - --- -- - ~ ~

MATERIAL.

WEIBMT VOLUME RADIDACTIv!TT

....==

. CaNCRETE 70.7 46 3 es.4

. ORAPMITE 22.4 22.5 1.2

. CARDON STEEL 3.9 0.6 3.8

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STAINLESS STEEL 0.06 01 29.4

. CADMIUM CONTROL RODS 0 02' O.1 0.9

. MISCELLANEOUS 1.4 7.7 0.02 Nott-TOTALS DO NOT ADD UP 70 1002 AT ALL TIMESe DUE TO

• ROUNDING OFF*.

4

............................................s**********************************t~

~

NON-RADIDACTIVE SHIPMENT DATA

. MATERIAL WEIBMT I

. CONCRETE 92.8

. STEEL-Pt ATE - ' 28 STEEL RE.3AR 10'

. MISCEtLANEOUS 3.4 1

4

s-A P Peet me.- U.N.C.' DECOMMISSIONINS DATA SYSTEM - SISPOSAL COSTS19403024

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$ SHIP. SHIP. DISP.

.'SMIPPING,

. NO. CONT. CONT.

CONTAINER TYPE

. CONT. COST. RENT.

8 9 ATE.NUM

. SITE.9ASIC 6CtrRIC.SP/MNS.0TMER. TOTAL. ConPmWT.DASIC.PERntf.0THE3. TOTAL s...................................................................................................................................

031215 1 RICH 1902.7 1902.7 TRI-STATE 1202.9 65.41 1264.5 17H DRUMS.

• 25 ' 474 3 N/A 020720 2 RICH 1843.5 1843.5 TRI-STATE 1585.2 30.62 5435.0 17H DRUMS 9

171 5 N/A DOXe WOOD 1

408 8 N/A 8

5443 0 TRS-STATE 740s.5 148.5 7557.0 17H DRUMS 44 1978 N/A,

e30286 3 RICM 5643.0 830309 4 RICH -2734.0

'2736 0 TRI-STATE 43'2.0 544.94 4937.0 17H DRUNS 32 533 4 N/A

.1) A TOTAL OF COSTS FOR WASTE SHIPMENT AND CONT AINER PROCUREMENT IN THIS REPORT ete NOT ESUAL TME TOTALS IN THE 8trERAL INFORMATION REPORT WMICH WAR TAKEN FROM

$NCSU RECORDS. PRESUMA8LT OTHER CHARSES NOT REFLECTED IN THIS REPORT 8CONTRIDUTE TO WASYS. SMIPMENT AND CONTAtWR FROCUREMENT COSTS.

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..R-3-NCON U.N.C. M CONNISSIONIMS DATA - SbRVEILLANCE REPORT 194E3030

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s................................................ 7....E MPEN9 t TURE I TEN M 9CR I P T ION

. MOTE - INFORMATION tsNICN woutB LOGICALLY DE INCLUND IN TNIS MPORT Wet NOT

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. SON AFTER FINAL SNUTDOWN AND ASSOCIATED COSTS AND PERSONNEL EXPOSURE WERE

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4. TITLE AND sueTITLE (Add Vmwme Na. of enereroen).

2. lleave blek)

Evaluation of Nuclear Decomissioning Projects-Summary Report North Carolina State University

2. RECIPIENT S ACCESSION NO.

Research and Training Reactor

7. AUTHORISI

5. DATE REPORT COMPLETED -

B. W. Link, R. L. Miller June l'1983

'^"

9. PERFORMING ORGANIZATION NAME AND MAILING ADORESS (Incive Esp Com/

DATE REPORT ISSUED UNC Nuclear Industries Decommissioning Programs Department August i"1983

^"-

Richland,'WA-99352-8 ' "" * #

9. (Leave oma)

12. SPONSORING ORGANIZATION NAME AND MAILING ADORESS (Inc/ vel,p Co*J Division of Engineering Technology la PR JECT /T ASWORGNIT NOc Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission

11. CONTRACT NO.

Washington, D.C.

20555 FIN 87568

13. TYPE OF REPORT PE RIOD COVE RED //nclusive dams)

Technical

15. SUPPLEMENTARY NOTES

14. (Leave e/m4/

16. AnlSTR ACT 000 words or ess) s This document sumarizes information from the decommissioning of the NCSUR-3 (R-3), a 10 KWt university research and training reactor. The decommissioning data were placed in a computerized information retrieval / manipulation system which permits future utilization of this information in pre-decommissioning activities with other university reactors of similar design. The information is presented both in some detail in its computsr output form and also as a manually assembled sumarization which highlights the more significant aspects of the decommissioning project. Generic. decommissioning data extracted from NUREG/CR 1756, " Technology, Safety and Costs of Decommissioning Nuclear Research and Test Reactors," and data from the decommissioning of the Ames Laboratory Research Reactor (ALRR),

a 5 MWt research reactor, is also included for comparison.

17. KEY WORDS AND DOCUMENT ANALYSIS 17a. DESCRIPTORS Decommissioning, Reactors Program Plan, ALARA, Radiation Exposure Cost, Comparison. Studies

)

17ts. IDENTIFIERS /OPEN ENDED TERMS

18. AVAILABILITY STATEMENT

19. SE CURITY CLASS (This reportl 21 NO. OF PAGES Unlimited Unclassified

20. SECURITY CLASS (Thas papel

22. P RICE Unclassified S

NEC FO*.M339 17 773 1

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