ML20234D880

Forwards Insp Repts Documenting Program for Prelicensing Insp of Pool Irradiator Facility in Libertyville,Il.Proposed Recommendations for Future Prelicensing Insps Also Encl

ML20234D880
Person / Time
Issue date:	03/13/1986
From:	Axelson W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Cobb L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20234D394	List: IA-87-809, Forwards Proposed Manual Chapter Re Insp of Large Irradiators Prior to Issuance of License.Comments Requested by 850515 ML20234D390 ML20234D396 ML20234D815 ML20234D821 ML20234D854 ML20234D868 ML20234D880 ML20234D989 ML20244D314
References
FOIA-87-809 NUDOCS 8801070261
Download: ML20234D880 (1)

Text

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X,:,3 I s MAR 131986 l

l MEMORANDUM FOR: L. I. Cobb, Chief, Safeguards and Materials Program Branch, IE i FROM: W. L. Axelson, Chief, Nuclear Materials Safety and Safeguards Branch, Pegion III s

SUBJECT:

INSPECTION OF LARGE P0OL IRRADIATORS PRIOR TO ISSUANCE OF A LICENSE l

l l

Attached for your information are the inspection reports which document our program for the pre-licensing inspection of the pool irradiator facilty in Libertyville, Illinois. Based upon our inspection of this facility, we have generated recommendations for future pre-licensing inspections. These are attached for your review and comment.

The pre-licensing inspection required coordination between licensing, inspection and reactor engineering groups in our Region. We feel this coordination is necessary and leads to an effective program as outlined in your proposed manual chapter.

i O

W. L. Axels'n, o Chief Nuclear Materials Safety

, and Safeguards Branch Attachments:

1. Rpts dtd 10/18/85 and 12/19/85 to License File

2. Recommendations for Construction and Reoperation Inspections of Large Irradiators cc w/ attachments:

l D. A. Nussbaumer, SP l C. R. Chape11, NMSS '

V. L. Miller, NMSS l J. H. Joyner, RI l K. P. Barr, PII J. A. Hind, RIII i R. E. Hall, RIV '

J. L. Montgomery, RV i o 7,'

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Enclosure 1 UNITED STATES

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NUCLEAR REGULATORY COMMisslON

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, REGION 811 h A, 0,,

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.Og ' %.* ,o'g CLEN ELLYN. ILLINO15 60937 l e...*

OCT 18 885 -

I MEMORANDUM FOR: License File Facility: Isomedix, Inc. .

Industrial Drive and White Boulevard Libertyville, IL 60048' Docket No.: 030-28839 i FROM:

Bruce S. Mallett, Ph.D., Chief, Materials Licensing Section

SUBJECT:

SITE VISIT TO EVALUATE PORTIONS OF PANORAMIC WET SOURCE-STORAGE IRRADIATOR DURING CONSTRUCTION PHASE This refers to the site visit conducted by Dr. B.S. Hallett and Ms. P.J. Whiston of the Materials Licensing Section, Region III, on October I,1985, and Mr. i J.M. Jacobson of the Reactor Protection Systems Division, Region III, at  !

Isomedix, Inc., Industrial Drive and White Boulevard,'Libertyville, Illinois.  !

The purpose of the visit was to inspect certain portions of. the proposed wet source-storage irradiator facility during the relicensing, construction phase.

The areas examined during the visit and conclusions and/or recommendations are as follows: 1 I. PERSONS CONTACTED i

T. Varaklis, P.E., Director of Engineering, Isomedix, Inc. l C. Scholer, Project Engineer, R.A. Morley Company, Inc.-Contractor Other staff members of R. A. Morley Company

2. BACKGROUND Isomedix, Inc. applied for a license for the facility in a letter and application dated July 31, 1985. At that time, the licensee indicated ~

that the construction of the wet storage pool and irradiator room shield  ;

walls was completed. At the time of the site visit, the structures for the irradiator room, wet storage pool, control room, warehouse, and office area were completed.

i W,.LO.1.24%5 @ 9 ee. i

l License File 2

3. SITE Enclosure 1 is a general layout of the. facility and surrounding areas.

Areas Examined '

Location of adjacent population centers, proximity of major transportation l thoroughfares, proximity fo police and fire department services, access to facility, relationship to water and sewer systems, preparation of soil for construction.

Conclusion / Recommendations I The facility is in a industrial complex with no apparent residential facilities within a 1 mile radius, as a minimum. No major highways or railroad systems near facility; therefore should not be potential for transportation incidents. The facility is accessible for police and fire-department crews and any evacuations. The applicant did conduct analysis i

of soil and had to excavate to 11 feet below ground surface for shield wall foundation and 20 feet below ground surface for pool foundation.  ;

Region III asked applicant to provide location of nearest police and fire '

departments and time estimates for arrival at facility. Region III asked applicant for report on soil analysis and construction of foundation to satisfy city building codes on supporting the mass of the shield walls.

The report should include data on nature of subsurface material soil packing, or any other factors which would result in soil instability.

Region III asked applicant to provide data on height of water table in area.

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4. FACILITY CONSTRUCTION Areas Examined General layout of facility, thickness and type material used for shield walls; access points to irradiator room, activated products, control room, equipment and/or water purification room, and penthcuse for the source ~

hoist mechanisms; pool and water circulatory system; penetrations through shield walls and/or pool.

Conclusions / Recommendations The site team was only able to examine final construction drawings and structures, since most of the building was complete prior to the visit. ,

Consequently, the Region has to rely on licensee data on quality control.

Future applicants should be required to coordinate a schedule of construction with the NRC prior to initiating construction. The following is a ' list of conclusions and/or recommendations for each area examined:

O License file 3

a. Pool Liner The pool liner was constructed from stainless steel prior to being installed in the concrete support structure at the site. No data was available on the quality control program for this liner. The pool was covered at the time of the site visit and will need to be examined visually during the next visit. From drawings, however, there are 2 areas that require further investigation:

1). There is a hole left in the center of the bottom of the liner during the ecostruction phase to allow for relief of water collecting between the liner and concrete support structure. This hole is to be plugged and weloed shut prior to filling pool. This is a potential leakage point and the closures shculd be quality controlled. Region III asked the applicant to provide this data when available.

2). There is a bar welded to liner which is used for support for attachrent of 2 source rack guide lines. The associated welds should be quality controlled. Region III asked the licensee to provide this data when available.

From the drawings and statements made by the applicant, there are no penetrations in pool liner or support structure below the top 6 inches, except for the hole mentioned.

b. Circulatory System The circulatory system consists of a series of stainless steel pipes running from the pool to the equipment room where they are run through a water treatment system. The pipes travel in concrete troughs which are depicted in Enclosure 2 (see red dashes). The system is supposed to be isolated from any city water via a check valve in the incoming, makeup water supply. This installation will need to be inspected during a future site visit. The city water supply and sanitary sewer lines are isolated from this circulatory system or troughs. However, if there is a rupture of a line, it is conceivable that the water will run into the troughs and' into the building via concrete seepage. It is also plausible that a leaking source could contaminate the concrete structure and after a long period of time, leak into the soil around the pool or under the building foundation. However, the resultant concentration to the storm drainage system or soil should be negligible in view of the thickness of concrete the water would have to traverse. The troughs should have been designed to slope into the pool; whether or not this was done could not be ascertained from the data on-hand at the site. There is a drain in the floor of the equipment room and in the event of a leaking source and line break, this would be the most plausible route to outside sewer system.

The materials used for the pipes should be compatible with the stainless steel liner of the pool. This will need to be examined during the next inspection when lines are installed.

License File 4

c. Shielding For Irradiator Room ~

There were no records available to detemine adequacy of the density in the shield walls, Region III requested the applicant to submit results of tests performed during concrete pouring of shield walls, pool support structure, and building floor support structure.

The'following is a list of the only penetrations to the irradiator room other than the access maze:

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a. Two ventilation ducts passing through the floor in two corners of the room as shown in Enclosure 2. They pass under the floor to the equipment room. These should pose no problem to the effective shielding, since they compromise the shielding toward the ground,

b. The circulatory system trough. This trough will compromise the shielding and a future inspection should be performed to ensure there is adequate lead wool or similar shieldin trough after installation of the sources,g material placed in the

c. Two access ports, two source rack cable ports, and four source rack l

- guide cable ports penetrate the ceiling to the irradiator room. The drawings indicate that these ports will be properly plugged and shielded after installation of cables. This should be examined during a future inspection at the time the ports are plugged and after installation of sources. l' The thickness of the shield walls was measured where accessible. All walls were as indicated on the drawings submitted by the applicant, except the j wall labeled A in Enclosure 2. This wall is only 12 inches thick, and the drawings submitted by the applicant indicate 18 inches. Whether or not 1 this is a significant issue will be detemined by shielding calculations during the relicensing review process.

Measurements of distances to shield walls from source rack location were taken for use in shielding calculations. Materials Licensing Staff will perform source loading.

shielding calculations to assess adequacy of shielding prior to ~

1

1 i

License File 5

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5. SCHEDULE I

Region III requested the applicant to submit a copy of the project specification which includes concrete, sitework, mechanical (plumbing, j ductwork), and electrical areas; a copy of the design calculations and '

certification for the welding of the stainless steel liner; and a surmiary

. report of the field inspection of the concrete.

i The following items, in addition to those already identified, need to be examined at the time they are installed: {

ITEM I TENTATIVE SCHEDULE Source Rack and Cabling November 4-8, 1985 Circulatory System November 4-8, 1985 Radiation Monitoring, Control i Systems, Safety Interlock Systems Noverber 11-15, 1985 Security, Fire Protection Systems November 11-15, 1985 Source Loading ,

Af ter November 15, 1965 The applicant will notify us when their installation is scheduled. A tentative schedule is listed.  !

j

6. REFERENCES UTILIZED FOR SITE VISIT

a. i Standard Review Plan for Applications for Licenses for the Use of  !

- Panoramic Wet Source-Storage Irradiators, December 1984.

b.

American National Standard N43.IO-1984; Safe Design and Use of Panoramic Wet Source Storage Gamma Irradiators (Category IV). I c.

Proposed IE guidance on Inspection of Large Irradiator Prior to Issuance of a License enclosed in April 25, 1985 memorandum from L.I. Cobb to W.L. Axelson.

Wlb Bruce S. Mallett, Ph.D. , Chief Materials Licensing Section

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