ML20216D293

Rev 3 to POEF-LMUS-10, Criticality Accident Alarm Sys Coverage & Exclusions

ML20216D293
Person / Time
Site:	Paducah Gaseous Diffusion Plant, Portsmouth Gaseous Diffusion Plant
Issue date:	12/31/1998
From:	Rapp J AFFILIATION NOT ASSIGNED
To:
Shared Package
ML20195H463	List: ML20195H454 ML20195H477 ML20195H487 ML20216D293
References
POEF-LMUS-10, POEF-LMUS-10-R03, POEF-LMUS-10-R3, NUDOCS 9906170061
Download: ML20216D293 (31)

Text

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l Portsmouth Updated References to May 22,1996 submittal 6

9906170061 990301 PDR ADOCK 07007001 B.

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i L ADDENDUM TO POEF LMUS-10," Criticality Accident Alarm System Coverage and Exclusions",

'D

Revision 3, December,1998, by J. A.- Rapp Jr, The following addendum to Section 2 of the subject report includes the changes from the latest Lease

)

~

Change between the DOE and the USEC. None of the facilities added to the Lease require coverap 'ny.

CAAS. None of the facilities deleted required coverage by CAAS FACILITIES ADDED '-

X l'06C.-

. New Fire 'hining Building..

X 230A-41

. Ambient Air Monitoring Station A-41 (located offsite at Zahn's Corner)

X-611E Clearwell and Chlorine Building (at X-61 I water treatment facility)

X 747.

Clean Scrap Yard 1107DV:

z Administrative Vehicle Portal USEC Contractor Trailer Area Approximately 2.8 acres; bounded south by construction road, west by

- Perimeter Road, north by drainage ditch, and area is directly south of X-6614E FACILITIES DELETED -

X-100L'

. EnvironmentalControlTrailer X-106B

' Old Fire Training Building X-630-3 J Acid Handling Station FACILITY NAME/ FUNCTION CHANGE X-3000 Chan,ed from " Electronic Maintenance Building" to " Environmental Compliance Building" Note: A few ulitorial changes were made in the updated Lease Agreement to building names or identifying numbers; he wever, none were substantive with respect to the report evaluation or conclusions s

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POEF-LMUS-10 Revision 3 l

A l

4 L O CKN E E D M A R TIN Criticality Accident Alarm System PORTSMOUTH Coverage and Exclusions GASEOUS DIFFUSION J

PLANT December 1998 l

l By J. A. Rapp, Jr.

l LOCKHEED MARTIN UTILITY SERVICES, INC.

PORTSMOUTH GASEOUS DIFFUSION PLANT P.O. Box 628 Piketon, Ohio 45661 Under Contract USEC-96-C-0001 to the U.S. ENRICHMENT CORPORATION l

t_cxweg,urury semnces.mc.

" T O *Yc%*cm -

POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions

- December 1998 '

Page 1 of 30 l

l 1

l DISTRIBUTION l

LOCKHEED MARTIN UTILITY SERVICES, INC.

)

I l

PORTSMOUTH

Bahney, B.

Lemming, R.

l Belford, -

J.

Rapp, J.(5) l-

Bolling,

.J.

Van Volkinburg, S l

Corzine, G.

Central Files (2) l D'Aquila D.

X-710 Technical Library (2) l

Demeglio, R.

NRA (5) l Hone,-

M.

USEC (5) l

.f POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 2 of 30 l

I NTRO D U CTIO N.....................................................

3 l

l Section 1.

AREAS COVERED BY CRITICALITY ACCIDENT ALARM SYSTEM 4

l l

Section 2.

NON-PROCESS BUILDINGS NOT COVERED BY A CAAS FOR WHICH l

AN EXCLUSION IS REQUESTED.............................

7 l

l Section 3. - EXCLUSION OF ROADWAYS FOR CERTAIN MATERIALS......

21 l

l Section 4.

EXCLUSION FOR LARGE CYLINDERS OF UF. IN STORAGE YARDS 22 l

l Section 5.

EXCLUSION FOR THE BUILDING XT447 OUTSIDE STORAGE PAD 27 l

l REFE REN C E S.....................................................

2 8 l

l

~

POEF-LMUS-10 Revision 3

' Criticality Accident Alarm System Coverage and Exclusions l

December -1998 Page'3 of 30 INTRODUCTION l

1

-Federal regulation,l10 CFR 76.89', requires criticality monitoring and alarm system

[

coverage for all areas of a facility except approved exclusions. The national standard, l

2 ANSI /ANS-8.3, also addresses alarm systems. ANS!/ANS-8.3 Section 4.2.1, requires that the need for a criticality monitoring and alarm system shall be evaluated for all activities in individual unrelated areas for which the inventory of fissionable materials involved exceeds 700 grams of 23sU.

This report is divided into five sections. Section 1 discusses areas of PORTS that are i

covered by the Criticality Accident Alarm System (CAAS). Section 2 discusses non-process buildings not covered by a CAAS for which an exclusion is requested. Section l

3 discusses an exclusion from CAAS coverage of. adways for certain materials.

i Section 4 requests an exclusion from CAAS coverage for cylinder storage yards.

l Sectron 5 requests an exclusion from CASS coverage for the outside storage pad west l

j of Building XT-847.

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POEF-LMUS 10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 4 of 30 l

. Section 1.

AREAS COVERED BY CRITICALITY ACCIDENT ALARM SYSTEM l

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POEF-LMUS-10 Revision 3 l

Criticality Accident Alarm System Coverage and Exclusions l

Dacember 1998 Page 7 of 30 Section 2.

NON-PROCESS BUILDINGS NOT CGVERED BY A CAAS FOR WHICH l

l AN EXCLUSION IS REQUESTED The purpose of this section is to request an exclusion from 10 CFR Part 76.89 for all PORTS buildings / areas that do riot contain operations involving uranium enriched to 1 l

. wt% or higher "U, and 15 grams or more of 2mU. LMUS is requesting an exclusion for 2

the buildings / areas listed in the following table. This list was generated using revision l

I 26 (November 6,' 1998) of the Application for the Portsmouth Gaseous Diffusion Plant.

1

- Historically these buildings / areas have not had uranium operations. Thus, there is no l

need for a Criticality Accident Alarm System (CAAS) in them.. Areas will be added to or I

- deleted from this section per the Lease Agreement between the United States Department of Energy and the United States Enrichment Corporation.

There are two buildings in this list that have greater than 1% uranium enrichment and

. more tt i 15 grams uranium. The two buildings are X-744H and X-744L. These two buildings are warehouses that store contaminated equipment. Both buildings have an areal density ofless than 50 g "U/m. Access to both building are controlled ensuring l

2 2

that the areal density of material in these buildings is not exceeded. Since both.

l buildings have an areal density of less than 50 g "U/m, a CAAS is not required and 2

2 an exclusion from 10 CFR Part 76.89 is requested for these buildings.

l There are two depleted uranium cylinder storage yards listed in this table. They are X-745G and X-745H. These areas are used to store uranium hexifluoride filled cylinders.

~ The uranium in them contains less than 1% 2"U. Since uranium with less than 1% 2"U can not go critical a CAAS is not required and an exclusion from 10 CFR Part 76.89 is requested for these areas.

l 1

f'

POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions 3

December 1998 Page 8 of 30

)

Facility Requires Coverage Number Facility Name and/or Function by CAAS X-100 Administration Building no j

X-1008 Air Conditioning Equipment Building n'o X-100L Environmental Cvntrol Trailer no X-101 Health Service Center no

)

X-102 Cafeteria no

{

X-103 Auxiliary Office Building no X-104 Guard Headquarters no X-104A Indoor Firing Range no X-105 Electronic Maintenance Building no X-106 Tactical Response Station no X-106B Fire Training Building no X-108A South Portal and Shelter no X-108B North Portal and Shelter no X-108E Construction Portal no X-108u Pike Avenue Portal no X-109A Personnel Monitoring Building no X-109B Personnel Monitoring Building no X-109C Personnel Monitoring Trailer no X-111 A SNM Monitoring Portal (X-326) no X-111B SNM Monitoring Portal (NW X-326) no X-112 Data Processing no X-114A Outdoor bring Range no i

i a

m-POEF-LMUS-10 Revision 3 Criticality Accident' Alarm System Coverage and Exclusions December 1998

'Page 9 of 30 Facility Requires Coverage Number -

Facility Name and/or Function -

by CAAS c

r-X-120H Meteorological Tower.

no l

X-200 Site Prep, Grading, Landscaping no L

X-201 -

Land and Land Rights.

no t

X-204.

Railroad and Railroad Overpass no X-206A Main Parking Lot (N) no X-206B Main Parking Lot (S) no

.X-206E Construction Parking no X-206H Pike Avenue Parking Lot no X-206J South Office Parking Lot no X-208 Security Fence.

no X-210 -

Sidewalks-no X-215A Electrical Distribution to Process Buildings no X-215B Electrical Distribution to Other Areas no X-215C Exterior Lighting.

no X-215D Electric Power Tunnel no X-220A1 Instrumentation Tunnels no X-220B1 Process Instrumentation Lines.

no X-220B2 Canler Communication Systems no X-220B3 -

Water Supply Telemetering Lines no l

X-220C Superior American' Alarm System no X-220D1 General Telephone no X-220D2 :

Process Telephone no e.

. POEF-LMUS-10 Revision 3 f

Criticality Accident Alarm System Coverage and Exclusions

. December 1998' Page 10 of 30 Facility Requires Coverage f

Number Facility Name and/or Function by CAAS X-220D3 Emergency Telephone System no X-220E1 Evacuation F A:ic Address System no X-220E2 Process Public Address System no X-220E3 Power Public Address System.

no X-220F Plant Radio System no

)

X-220G Pneumatic Dispatch System no X-220H MuCulloh Alarm System no X-220J Radiation Alarm System no X-220K Cascade Automatic Data Processing System -

no X-220L Cascade Automatic Data Processing System no X-220N Security Alarm and Surveillance System -

no X-220P Maintenance Work Authorization and Control no System X-220R Public Waming Siren System -

no e

X-220S Power Operations SCADA System no X-230 Water Supply Line no X-230A Sanitary and Fire Water Distribution System no X-230A-3 Ambient Air Monitoring Station A-3 (South Access -

no Road)

X-230-A-6 Ambient Air Monitoring Station A-6 (at Power Pole no 6 in Piketon)

X-230A-8 Ambient Air Monitoring Station A-8 (at Power Pole no 74 NearX-735)

f POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 11 of 30 l

Facility L Requires Coverage Number Facility Name and/or Function.

by CAAS X-230-A-9

~

Ambient Air Monitoring Station A-9 (at Wakefield no Mound Road)

X-230-A-10 :

Ambient Air Monitoring Station'A-10 (at Don no-Marquis Substation).

X-230-A-12 Ambient Air Monitoring Station A-12 (at McCorkle no Road) i X-230-A-15 Ambient Air Monitoring Station A-15 (at Loop Road) no X-230-A-23.

Ambient Air Monitoring Station ~A-23 (at Taylor no i

Hollow and McCorkle Road) l X-230-A-24 Ambient Air Monitoring Station A-24 (at Shyville no Road).

X-230-A-28 Ambient Air Monitoring Station A-28 (at Camp no Creek Road) i X-230-A-29 Ambient Air Monitoring Station A-29 (at West no Access Road)

X-230-A Ambient Air Monitoring Station A-36 (at X-611) no X-230-A-37 Ambient Air Monitoring Station A-37 (at Mount no

- Hope Road)

X-230-A-40.

Ambient Air Monitoring Station A-40 (at X-100 no Penthouse)'

X-2308 -

Sanitary Sewers no X-230C Storm Water Sewers no l~

X-230D Soften Water Distribution System no f

X-230E Plant Water System (Makeup to Cooling Towers) no X-230F Ra'w Water Supply Lines no l

L

POEF-LMUS-10 Revision 3,

~ Criticality Accident Alarm System Coverage and Exclusions:

4 December 1998 Page 12 of 30 Facility Requires Coverage Number ~

Facility Name and/or Function by CAAS X-230G RCW System no X-230H '

Fire Water Distribution System no X-230J1 Environmental Monitoring Station no X-230J2 :

South Holding Pond Effluent Monitoring Station no X-230J3 -

West Environmental Monitoring Building no X-230J4 Environmental Air Monitoring Station no X-230J5 -

West Environmental Sampling Building no X-230J6 Northeast Monitoring Facility no X-230J7 East Monitoring Facility no X-230J8 Environmental Storage Building no X-230J9 North Environmental Sampling Station.

no X-230K South Holding Pond no X-230L -

North Holding Pond no X-232A Nitrogen Distribution System no X-232B Dry Air Distribution System no X-232D Steam and Condensate System no X-232E Freon Distribution Lines no X-232F Fluorine Distribution System no X-232G Supports for Distribution Lines no X-240A -

RCW System (Cathodic Protection) no X-300 Plant Control Facility no

p.

9 POEF-LMUS-10 Revision 3

Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 13 of 30 Facility '

Requires Coverage Number Facility Name and/or Function by CAAS

~

X-300A '

Process Mcnitoring Building.

no X-3008 -

Plant Control Facility Carport no X-300C.

Emergency Antenna no X-334,

. Transformer Storage Cleaning Building no X-342B Fluorine Storage Building no X-344B Maintenance Storage Building no X-501 Substation no X-501 A '

Substation.

no X-502-Substation no X-515 330 KV Tie Line no X-530A Switch Yard no X-530B Switch House no X-530C Test and Repair Facility no X-530D Oil House no X-530E1 Valve House no X-530F Valve House no X-530G GCEP Oil Pumping Station no X-533 Transformer Storage Pad no X-533A-Switch Yard no X-533B -

Switch House no X-533C -

Test and Repair Facility no X-533D ~

Oil House no

POEF-LMUS-10 Revision 3 Criticality, Accident Alarm System Cove., rage and Exclusion.s December 1998 -

Page 14 of 30 l

l Facility Requires Coverage Number' Facility Name and/or Function by CAAS X-533E -

Valve House no X-533F -

Valve House no X-533H Gas Reclaiming Cart Garage no X-540 Telephone Building.

no.

X-600 Steam Plant no X-600A Coal Pile Yard no X-600B.

Steam Plant Shop no X-600C Ash Wash Treatment Building no' XT-801 South Office Building no X-605 Sanitary Water Control House no X-605A Sanitary Water Wells no X-605H Booster Pump House and Appurtenance no h

X-6051 Chlorinator Building no X-605J Diesel Generator Building no X-608 Raw Water Pump no X-608A Raw Water Wells (1 to 4) no X-608B Raw Water Wells (5 to 15) no X-611 Water Treatment Plant and Appurtenances no i

X-611B Sludge Lagoons no X-611 C.

Filter Building no X-611D Recarbonization Instrument Building no X-612 Elevated Water Tank no

?

't i

i

. POEF-LMUS-10 Revision 3 Criticality' Accident Alarm System Coverage and Exclusions i

December 1998 Page 15 of 30 l

l Facility Requires Coverage Number Facility Name and/or Function by CAAS X-614A Sewage Pumping Station no X-614B Sewage Lift Station no X-614D South Sewage Lift Station-no X-614P Northeast Sewage Lift Station -

no X-616 Liquid Effluent Control Facility no X-617 South PH Control Facility.

no X-618 North Holding Pond Storage Building no X-621 Coal Pile Runoff Treatment Facility.

no X-626-1 Recirculating Water Pump House no X-626-2 Cooling Tower no X-630-1 Recirculating Water Pump House no X-630-2A-Cooling Tower no X-630-2B_

Cooling Tower _

no X-630-3 Acid Handling Station no X-633-1 Recirculating Water Pump House no X-633-2A Cooling Tower no X-633-2B Cooling Tower no X-633-2Cl Cooling Tower no X-633-2D Cooling Tower _

no X-640-1 Firewater Pump House no X-640-2 Elevated Water Tank no I-700A Air Conditioning Equipment Building no

POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions December.1998 Page 16 of 30 Facil'ty.

Requires Coverage i

Number -

Facility Name and/or Function by CAAS X-701A Lime House no X-701D Water Deionization Facility no X-705D _

Heating Booster Pump Building no X-710A Technical Services Gas Manifold Shed no X-710B Explosion Test Facility no X-720A Maintenance and Stores Building Gas Manifold no Shed X-7208 Radio Base Station Building no X-720C Paint and Storage Building no X-741 Oil Drum Storage Facility no X-742 Gas Cylinder Storage Facility no X-743 Lumber Storage Shed no X-744B Salt Storage Building no l

X-744H Bulk Storage Building no, this building contains more than 15 grams of uranium, but contains an areal density ofless than 2

50 g/m,

X-744J Bulk Storage Building no X-744L Stores and Maintenance no, this building contains more than 15 grams of uranium, but contains an areal density of less than 2

50 g/m,

! POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions i December 1998 Page 17 of 30 Facility!

Requires Coverage Number Facility Name and/or Function by CAAS X-744W- ~

Surplus and Salvage Warehouse no X-745G.-

DUF6 Cylinder Storage Yard no,2"U enrichment ~

less than 1%

X-745H L DU Storage Yard' no,2"U enrichment less than 1%

X-746 Materials Receiving and Inspection Building no X-747A -

Material Storage Yard no X-747B Material Storage Yard no X-747C Material Storage Yard no I

X-747D Material Storage Yerd no i

X-747E Material Storage Yard no X-747F Miscellaneous Material Storage Yard no l

~

X-747J.

Decontamination Storage Yard no X-748 Truck Scale Facility no-X-750' Mobile Equipment Maintenance Shop -

no X-750A Garage Storage Building no XT-847 Warehouse - Office Area -

no l

X-1000 Administration Building no X-1007 -

Fire Station no X-10201 Emergency Operations Center (EOC) no X-1107A Administrative Portal-no X-1107B -

Interplant Portal no X-1107BP '

Admin; Portal no

POEF-LMUS-10 Revision 3

. Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 18 of 30 Facility Requires Coverage Number Facility Name and/or Function by CAAS X-1107D Northeast Portal no X-2200 Site Preparation, Grading and Landscaping no X-2202 Roads (GCEP) no X-2204 GCEP Railroads no X-2207A GCEP Administrative Parking Lot no X-2207D Northwest Parking Lot no X-2208 Security Fence no X-2210 Sidewalks no X-2215A Underground Electrical Distribution to Process no Buildings '

X-2215B Electrical Distribution to Areas Other than Process no Buildings X-2215C Exterior Light Fixtures -

no-X-2220C Fire and Supervisory Alarm System no X-2220D Telephone System no X-2220L Classified Computer System no X-2220N Security Access Control and Alarm System no X-2230A Sanitary Water Distribution System no X-2230B GCEP Sanitary Sewers-no X-2230C Storm Sewers no X-2230F Rav, Water Supply Line no X-2230G Recirculating Water System no X-2230H Fire Water Distribution System no

r L

POEF-LMUS-10 Revision 3

! Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 19 of 30 L

Facility.

Requires Coverage Number.

Facility Name and/or Function by CAAS X-2230J '

Liquid Effluent System no j

X-2230T'-

Recirculation Heating Water System no X-2232A' Nitrogen Distribution System -

no X-2232B.

Dry Air Distribution System no X-2232D -

Steam and Condensate System no j

X-2232G Supports for Distribution Lines no I

X-3000 Electronic Maintenance Building no X-5000 GCEP Switch House no X-5001 Substation no X-5001A Valve House no X-5001B Oil Pumping Station no X-5015 HV Electrical System no

[-

X-6000 GCEP Cooling Tower Pump House no X-6001 Cooling Tower no-X-6001 A' Valve House no X-6609.

Raw Water Wells no X-6613 Sanitary Water Storage Tank no X-6614E Sewage Lift Station -

no X-6614G Sewage Lift Station --

no l

X-6614H Sewage Lift Station no L

X-6614J -

Sewage Lift Station no X-6619 Sewage Treatment Facility no l

POEF-LMUS-10 Revision 3 1

Criticality Accident Alarm System Coverage and Exclusions

~

December 1998 Page 20

.;3 i

Facility Requires Coverage Number Facility Name and/or Function by CAAS X-6643 Fire Water Storage Tanks'1 and 2 no X-6644 '

Fire Water Pump House no-X-7721 '

Maintenance Stores Training Building'(Training) no i

l i

i

- POEF-LMUS-10 Revision 3 -

Criticality Accident Alarm System Covciage and Exclusions

. December 1998 Page 21 of 30 Section 3. ; EXCLUSION OF ROADWAYS FOR CERTAIN MATERIALS Exclusion of roadways, X-202, from Criticality Accident Alarm Coverage is requested during transport of the following four general classes of materials under the specified conditions.

-Justification for the exclusion is given following the description of the specified conditions.

Class 1. Materials for which no epacing is required.

These materials will be limited to'a concentration less than 5 grams U-235 in 10 liter volume (500 ppm) or all of the material being transported at a time will have less than a safe mass of U-235 at the highest enrichment in transport. Materials may be in one container or piece of equipment or several containers or pieces of equipment.

The stated concentration is given in Section 5.2 of the SAR and is consistent with the roncentration given in 10CFR71.53 which exempts materials from being classifed as fissile ivr the purposes of off-site transport.

Class 11. Materials for which spacing is required.

Materials will be secured such that the spacing will be maintained during transport. The plant speed limit will be maintained. Individually, materials will contain less than a safe mass of U-235,' materials will be contained in volumetrically favorable containers, or materials will be contained in geometrically favorable containers.

The securing mechanisms will ensure spacing during normal transport and small transport abnormalities; e.g., bumps in roads, minor collisions. An overtuming of the transport vehicle

- or a major collision at speeds exceeding the plant speed limits would be required to create t% potential for criticality.L

+ Class Ill. Large UF6 Cylinders :

The exclusion for large UF. cylinders of solid UF,in storage is addressed in Section 4. The

NCS considerations for these cylinder movements on roadways would be the same as cylinder movements in the. cylinder storage yards.

Class IV. Materials Packated for Offsite Transport Materials meeting the criteria and limits for 10CFR71 for offsite transport will not require coverage by CAAS, Offsite shipment criteria have been established such that CAAS are not required.

Therefore, materials meeting the offsite shipment criteria should be excluded from CAAS coverage.-

POEF-LMUS-10 Revision 3 -

Criticality Accident Alarm System Coverage and Exclusions Decembe-1998 Page 22 of 30 Section 4.

EXCLUSION FOR LARGE CYLINDERS OF UF,IN STORAGE YARDS.

4.1 INTRODUCTION

The purpose of this section is to justify an exclusion from 10 CFR Part 76.89 for all cylinder storage yards / lots (X-7458 Toll Enrichment Process Gas Yard-UEA; X-745D Cylinder Storage Yard; X-745F North Process Gas Stockpile Yard) that may have UF, cylinders containing >1 wt% 23sU but 5 5 wt% 23sU, which are not covered by an existing CAAS at the Portsmouth Gaseous Diffusion Plant (PORTS). This justification is based on the Justification for Excluding UFe Cylinder Storage Yards from Criticality Accident Alarm Coverage", KY/S-271 (see attachment). This document evaluates the hazards associated with, and the controls applied to, cylinders containing >1 wt% 23sU to determine the credibility of a criticality accident. This document demonstrates that a criticality accident is not credible in the cylinder storage yardsMots at PGDP, thus an exclusion for the UFe ylinder storage yards / lots from CAAS coverage is warranted.

c Since the cylinder storage yards / lots at PORTS are similar to those at PGDP, the exclusion can be extended to the cylinder storage yards / lots at PORTS.

The credible accident scenarios addressed in the exclusion justification for PGDP involve the introduction of moderator into the UF cylinder. Accident scenarios that e

involve the release of UF, or UO F from the cylinder to a location where the uranium 2 2 might form a critical configuration are not considered credible at either PGDP or PORTS. Periodic surveillance of the cylinders will detect the collection of UF, or UO F 2 2 from the cylinder hefore a sufficiently large quantity could accumulate into a critical configuration. There are no mechanisms in the immediate area of the storage yards / lots at either PGDP or PORTS that would facilitate the collection of released material into a layer that exceeds the minimum critical slab thickness, l

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4.2 COMPARISON OF THE PGDP CYLINDER STORAGE YARDS / LOTS TO THE PORTS CYLINDER STORAGE YARDS / LOTS

.There is no difference in materials in the cylinder yards at PGDP and the cylinder yards / lots at PORTS as far as enrichment of 23sU (both a maximum of 5 wt% 2 PI), type of cylinders stored, or cylinder inspection methods (both plants use the same procedure). The following operational differences exist between PORTS and PGDP; PORTS allows the stacking of cylinders, PORTS has an overhead crane system over I

some of the cylinder storage yards / lots, and the PORTS peak ground acceleration for a 1,000 year earthquake (0.17 g ) is less than PGDP. The last difference is bounded by 2

the PGDP case. The two differences not bounded by PGDP, stacking cylinders in the storage yards / lots and heavy equipment (overhead crane system) above/ adjacent to j

the storage yardt/ lots are discussed in the following two sections.

4.2.1 STACKING CYLINDERS IN OUTSIDE CYLINDER STORAGE YARD / LOTS At PORTS cylinders are stacked a maximum of three high in cylinder storage yards / lots (Reference 13). Two additional scenarios are possible due to stacking.

The first scenario is that a cylinder could be breached while stacking. The breach is due to impact, drop, or puncture. This scenario is covered in Reference 11 Section 4.1.

The second scenario is that a cylinder is damaged in such a way that the damage is not detected. This scenario is covered in Reference 11 Section 4.4.

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~ 4.2.2 OVERHEAD CRANE SYSTEM Several cylinder storage yards / lots at PORTS have overhead crane systems for moving

~ cylinders. Six additional scenanos are possible due to the presence of the overhead crane system.

~

(The first scenario is that the crane drops the cylinder while transporting it. The dropped I

cylinder is breached due to impact, drop, or puncture. This scenario is covered in Reference 11 Section 4.1, L

The second scenario is that the crane drops the cylinder while transporting it but it is only damaged in such away that the damage is not detected. This scenario is covered

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1 POEF-LMUS-10 Revision 3:

Criticality Accident Alarm System Coverage and Exclusions

,t December 1998 Page 24 of 30

'in' Reference 11 Section 4.4.

The third scenario is that the crane _ drops a cylinder while transporting it'onto another

cylinder (s) causing either the dropped cylinder or target cylinder (s) to be breached. The breach is caused by the impact, drop, or puncture. This scenario is covered in Refereriva 11 Section 4.1.

The fourth scenario is tha' t the crane drops the cylinder while transporting it onto another cylinder (s) causing either the dropped cylinder or target cylinder (s) to be damaged in such away that the damage is not detected. This scenano is covered in Reference 11 Section 4.4.

. The fifth scenario is that part of the overhead crane system falls onto the cylinders breaching one. The breach is caused by an extemal impact. This scenario is not covered in Reference 11 Section 4.2 since PGDP does not have any heavy equipment adjacent to or over their storage yards. There are four events that could cause the overhead crane system to fall; mechanicel failure, tomado, earthquake, or flood.

Flooding is not a credible event since P. ORTS is 110 feet" above the 500-year flood level. The mechanical failure of the overhead crane system is not considered credible since the crane is inspectec every shift". The remaining initiators, tomado and

. earthquake are credible.

The frequency of a tomado and earthquake are discussed in Reference 11 Section 4.2 for PGDP and in References 14 and 12 for PORTS. In both cases the availability of sufficient moderation, successful detection, and ease of repair was considered. For both the tomado and earthquake successful detection and repair, in less than a week, is possible due to the high alerting factor of either event (see Table 4.2.2-A and 4.2.2-3).

The sixth scenario is that part of the overhead crane system falls onto the cylinders damaging one in such away that the damage is not detected. This scenario is covered in Reference 11 Section 4.4.

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F POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 27 of 30 Section 5.

EXCLUSION FOR THE BUILDING XT-847 OUTSIDE STORAGE PAD l

An exclusion is requested from criticality accident alarm system coverage of the outside j

storage pad immediately west of XT-847.

The storage pad immediately west of XT-847 is used to store B-25 boxes containing

, contaminated dry waste and scrap metal. Each B-25 box stored there is limited to s 100 grams U-235. All boxes have been NDA measured prior to storage. B-25 boxes can be grouped provided that there is 5 600 grams per group and each group is 12-inches edge-to-edge from adjacent groups.

The material is not permitted to be transferred from one container to another stored on l

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the outside pad.

l The stated gram limit for uranium-bearing waste material is stated in Section 5.2.2.5 of the SAR and is consistent with the gram limit given in 10CFR71.53 which exempts such materials from being classified as fissile for the purposes of off-site transport (15 grams U-235).

ANSI /ANS 8.3 states the need for a criticality accident alarm system is to be evaluated l

for all activities in which the inventory of fissionable materials in individual unrelated areas exceeds 700 grams U-235. Individual areas may be considered unrelated when the boundaries between such areas are such that there can be no interchange of materials between areas, the minimum separation between material in adjacent areas is 10 cm, and the areal density of fissile material averaged over each individual area is 2

less than 50 grams U-235/m. The limits on these operations, as described above, meet these conditions. The limit of 700 grams U-235 and the areal density of 50 grams 2

U-235/m is consistent with Section 5.2.2.5 of the SAR.

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Criticality Accident Alarm System Coverage and Exclusions j

December 1998' Page 28 of 30 1

REFERENCES l

i 1.

10 CFR Part 76.89.

1 2.

American National Standard for Criticality Accident Alarm System, ANSI-ANS-8.3-1979, American Nuclear Society, LaGrange Park, Illinois, August 29,1986.

]

3.

S. B. Negron, R.' W. Tayloe Jr., M. C. Dobelbower, Analysis of Criticality Alarm System Response to an Accidental Criticality outside the Cascade Process Buildings at the Portsmouth Gaseous Diffusion Plant, POEF-SH-19, Martin Marietta Utility Services, Inc., July 1994.

1 4.

M. C. Dobelbower, J. Woollard, B. L. Lee Jr., R. W. Tayloe Jr., Analysis of Criticality Accident Alarm System Coverage of the X-744G, X-744H, X-

? 342/344A andX-343 Facilities at the Portsmouth Gaseous Diffusion Plant, POEF-SH-35, Lockheed Martin Utility Services, Inc., September 1995.

I 5.

C. W. Skapik, M.' C. Dobelbower, J. E. Woollard, B. L. Lee Jr., J. A. Henkel, Analysis of Criticality Accident Alarm System Coverage in the X-700, X-705, andX-720 Facilities, POEF-SH-39, Lockheed Martin Utility Services, Inc.,

December 1995.

l 6.

C. W. Skapik, M. C. Dobelbower, J. Woollard, B. L. Lee Jr., An Examination

. of Criticality Accident Alarm Coverage of the X-710, X-760 Buildings and the North Half of the X-7745-R Storage Pad, POEF-SH-40, Lockheed Martin Utility Services Inc.,-January 1996.

7.

B. L. Lee Jr., M. C. Dobelbower, J. Woollard, C. W. Skapik, Examination of

. Criticality Accident Alann Coverage on the Operating Floors of the X-333, X-330, and X-326 Facilities at the Portsmouth Gaseous Diffusion Plant, POEF-SH-38, Lockheed Martin Utility Services, Inc., January 1996.

8._

Letter from B. L. Lee Jr. to D. M. D'Aquila, dated March 5,1996, " Additional MCNP Calculations for X-326 NDA Laboratory - Purchase Order 426215 Item

1. 2," Battelle.

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'. Criticality' Accident Alarm System Coverage and Exclusions December 1998 Page 29 of 30_

9.~

. S. B. Negron, R. W. Tayloe Jr., Analysis of the Proposed Relocation of the l

{

Neutron criticality Clusters in the Process Buildings for the Portsmouth Gaseous Diffusion Plant, POEF-SH-12, Lockheed Martin Utility Services Inc.,

q

- January 1994.

(10.

M. C. Dobelbower, J. Woollard, B. L. Lee'Jr., R. W. Tayloe Jr., Verification of

- Criticality Accident Alarm system Detector Locations for the X-326 Process CellFloor, POEF-SH-34, Lockheed Martin Utility Services Inc., August 1995.

11.

Justification for Excluding UFe Cylinder Storage Yards from Criticality

. Accident Alarm Coverage, KYlS-271.

12.

Final Safety Analysis Report for Portsmouth Gaseous Diffusion Plant, k

GAT /GDP-1073, originally issued April 1985.

13.

Storing and Handling of Large Cylinders of Uranium Material, PORTS NCSA-

- PLANT 004.001.

14.

Application for United States Nuclear Regulatory Commission Certification for the Portsmouth Ohio Gaseous Diffusion Plant, originally issued September 15,-1995.

15.

Design Analysis and Calculations NPH Evaluation for Stacked UFe Cylinders at Storage Yards, DAC-19045-CCA-60, Martin Marietta Energy Systems, Inc., Oak Ridge, Tennessee, June 12,1995.

16.

Deleted 17.

Deleted

18.

Deleted '

19.

.C W. Skapik and B. L. Lee, Jr., A Comparison of Two Criticality Accident Alarm System Detector Locations for the X-700 Building at the Portsmouth Gaseous Diffusion Plant, POEF-LMUS-02, Lockheed Martin Utility Services,

. Inc.. February 1996.

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POEF-LMUS-10 Revision 3 Criticality Accident Alarm System Coverage and Exclusions December 1998 Page 30 of 30 20.

A. S. Brown, R. W. Tayloe Jr, M. C. Dobelbower, J. Woollard, Examination of l

Criticality Accident Alann Coverage on the Operating Floors of the X-333, X-330, and X-326 Facilities at the Portsmouth Gaseous Diffusion Plant, POEF-SH-38 Rev.1, Lockheed Martin Utility Services, Inc., March 1997.

l 21.

NCS-CALC-98-023, Analysis of the Criticality Accident alarm System

[

Coverage within the XT-847 Building.

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