ML19322B549
| ML19322B549 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/31/1974 |
| From: | Thies A DUKE POWER CO. |
| To: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 7912040578 | |
| Download: ML19322B549 (3) | |
Text
-
r
~
e DUKE POWER COMPAM' Powrn Bertotwo 422 Sotrrn Gnunen STnzrT, Cu.AntoTTE, h. C. asaoi A. C. Tur r.s Sen.o= wet %ts oemt
- 3. O. Box 217e 6co ct.o* ano leamsmission m
,[ a ilay 31, 1974
/ :. ;;,' f _'. _ -~
f,v', }g: r:
' '. ~ ff $,, Y i)
~~
ru ~
- ' b. c.. d,
- j.-
'~
ld Mr. A. Schwencer, Chief u,f "
Light Water Reactors, Branch 2-3
.f w
Directorate of Licensing
-}
\\-[ --- ;##[( Y Office of Regulation
'6
.--M U. S. Atomic Energy Commission MJ Washington, D. C.
20545 Re: Oconee Nuclear Station Docket Nos. 50-269, -270, -287
Dear Mr. Schwencer:
In response to your letter of April 29, 1974, please find attached additional information concerning special nuclear materials and byproduct materials at Oconee Nuclear Station. This supplements the information provided in my letter of March 7, 1974.
Very truly yours, A.
A >. C / K A. C. Thies y
ACT:vr Attachment n..
g.=;.
r; m-pec a
'7 l r; "..O-y N___.
7912040 77h
)k REGULATORY DOPXMFILE COPY 4824
.~
DUKE POWER COMPANY OCONEE NUCLEAR STATION ADDITIONAL INFORMATION - SPECIAL NUCLEAR MATERIALS AND BYPRODUCT MATERIALS Introduction The following additional information is submitted in response to Mr. A.
Schwencer's request dated April 29, 1974, and supplements information provided in Mr. A. u ies' letter of March 7, 1974.
For clarity, this additional informatisn is identified using the same paragraph designations of the March 7 submittal and the April 29 request for additional information.
1.1.1 SPECIAL NUCLEAR MATERIAL DESCRIPTION OF EQUIPMENT AND FACILITIES - PU-BE NEUTRON SOURCE A.
TYPE AND LENGTH OF HANDLING DEVICES 1.
For use in Instrument Calibration Facility Source will be removed from shipping and storage container and placed in fixed holder for instrument calibration by use of first section of threaded handling rod which will not be removed from source.
(Length approximately 10") Container will normally be stored in instrument calibration facility.
2.
For use in performing response checks for out-of-core neutron detectors Storage container will be moved to Reactor Building.
An extension rod will be added to the handling rod and the source will be removed from its container and lowered into calibration tube adjacent to the out-of-core neutron detectors by adding additional extension rods.
This will require a total length of handling and extension rods of approxi-mately 24 feet.
3.
Description of each device in which the source is used and/or stored 1.
Storage Source will be stored in its DOT Specification or approved shipping containar which will be Monsanto Research Corporation, Model NS-6, Neutron Shipping Container; consisting essentially of a shielded 15 gallon steel drum modified to hold the source in the center and to facilitate insertion and removal of the source.
2.
Use (a) In Instrument Calibration Facility the source will be simply held in a stand by its handling rod so that neutron survey instruments may be held at various distances from it for calibration.
~
(b) In Reactor Building source will be inserted into a calibration tube by means of approximately 24 feet of extension rods so i
that the response of the out-of-core neutron detectors can be checked.
)
1.1.2 BYPRODUCT MATERIALS Sealed calibration sources are individually stored in appropriately shielded and locked containers in the instrument calibration room. Access to keys for these locked containers is controlled by the Health Physics Supervisor. and is limited to health physics personnel who are trained in the handling and use of these sources. A 0.5 curie Cobalt-60 sealed source, used for cali-bration of nuclear instruments in the reactor building and for calibration of radiation survey instruments, may at times be stored in its locked shipping container in the reactor bu41 ding. Another Cobalt-60 calibration source (2.5 curies) is stored in the instrument calibration source manipulator in a shielded well in the instrument calibration room.
The source manipulator requires several keys for operation, and these keys are controlled by the Health Physics Supervisor.
Interlocks between the source manipulator and i
shielding prevent inadvertent exposure of the operator.
Reg snsibility for the calibration and maintenance (other than repair) of the counting room instruments and portable radiation monitoring instruments is assigned to the health physics section.
Also, supervision of the use, i
handling, storage and shipment of all radioactive materials is assigned to the health physics section.
These assignments'of responsibility are docu-mented in the Oconee Nuclear Station Health Physics Manual.
Implicit in this i
assignment of responsibility is controlling availability and use of sealed sources (access is limited to qualified personnel who report to the Health Physics Supervisor).
i 3.2 PROCEDURES Access, handling, and use of special nuclear material and byproduct material sources has been in accordance with statements, representations, and pro-cedures contained in the application for special nuclear material and byproduct material licenses.
Responsibility for the supervision of the use, handling, storage, and shipment of these sources has been delegated to the Health Physics Supervisor by the Oconee Nuclear Station Health Physics Manual, issued and approved by the Station Superintendent.
Revision of the Oconee Nuclear Station Health Physics Manual is in progress.
Part of this revision will be to provide detailed procedures for controlling access to sources and ensuring safe handling and use so that personnel exposure resulting from their use will be as low as practicable.
It is anticipated these procedures will be completed by August 1, 1974.
The procedures will be available for review by Regulatory Operations at that time.