ML20236K867
| ML20236K867 | |
| Person / Time | |
|---|---|
| Issue date: | 04/17/1998 |
| From: | Steven Baggett, Michele Burgess NRC |
| To: | |
| Shared Package | |
| ML20236K705 | List: |
| References | |
| SSD, NUDOCS 9807100111 | |
| Download: ML20236K867 (7) | |
Text
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' REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY' EVALUATION OF DEVICE NO.: NR-8098-D-801-S DATE:
APR 171998 PAGE 1 OF 5 DEVICE TYPE:
Pipe Monitor 1
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'MODEL:
NCPM.
DISTRIBUTOR:
Merrick-Scale Manufacturing 180-190' Autumn Street Passaic, NJ 07055 i
l' MANUFACTURER:
New England Nuclear Corp.
601 Treble Cove Road North Billerica, MA 01862 l
SEALED SOURCE MODEL DESIGNATION?:
New England Nuclear NER-570 ISOTOPE:
MAXIMUM ACTIVITY:
l Cesium-137 200' millicuries (7.40 GBq)
' LEAK TEST FREOUENCY:
- 6 months PRINCIPAL USE:
(D) Gamma Gauge.
CUSTOM DEVICE:
-YES X
NO 9007100111 900417 L
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s REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE 1
NO,: NR-8098-D-801-S DATE:
APR j 7 gggg PAGE 2 OF 5 DEVICE TYPE:
Pipe Monitor DESCRIPTION:
This transmission gauging device is used to determine the amount of coal present inside a steel tube. The source housing. consists of a 4.5 inches (114.3 mm)
O.D. by 4.75 inches (120. 65 mm) long 1/16 inch (1.59 mm) thick mild steel tube enclosing 1.9 inches (48.26 mm) minimum radial thickness of lead shielding.
A 0.44 inch (11.1 mm) 0.D.
by 4.54 inch (115.3 mm) long stainless steel source holder locates the source in the center of the lead shield and a 0.16 inch (4.06 mm) diameter collimator allows the emission of the useful beam. The outer steel tube is welded to a 1/4 inch (6.35 mm). steel plate.
The source housing is fastened to the frame support with two 1/2-inch (12.70 mm) diameter steel bolts passing through the steel plate.
A steel cap is welded.to the other end.of the outer steel tube to enclose the shield.
The source housing is designed to use either a 50 mci (1,85 GBq) or 200 mci (7.40 GBq) Cs-137 source (NER-570) manufactured by New England. Nuclear Corporation. The source housing is coated with rust-inhibiting semi-gloss enamel to prevent any corrosion
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uof the shield.
The rotating steel shutter, 2.25 inches (57.15 mm) 0.D. by 2.81 inches (71.37 mm) long, has four positions, "OFF",
"ON",
and two calibrate positions.
After the source housing is installed and the rotating shutter is placed in the "ON" position, there are no moving parts during normal operation of the gauge.
~The approximate weight of the device is 15 kg (33.07 lbs).
LABELING:
- This device is labeled in accordance with.10 CFR Part 20.
The label contains the. radiation symbol, name of distribi tor, isotope, activity, date of assay, model number, serial number, source housing ANSI classification, and the words " CAUTION: RADIOACTIVE
, MATERIALS" and "SEE OPERATING MANUAL'FOR SAFETY INSTRUCTIONS".
DIAGRAM:
See attachments 1 and 2.
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REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO,.: NR-8098-D-801-S DATE:
PAGE 3 OF 5 g
DEVICE TYPE:
Pipe Monitor CONDITIONS OF NORMAL USE:
i The Model NCPM is designed for use as a nuclear coal pipe monitor to determine the amount of coal present inside a feed pipe.
The source housing should not be subjected to environmental conditions which exceed its ANSI N538-1978 performance classification.
PROTOTYPE TESTING:
A single prototype of the Model NCPM was tested by the New England Nuclear Corp.
The test data showed that the source housing qualified for an ANSI N538-1978 performance classification:
1.
ANSI-64-545-564-R2 with 50 mci (1.85 GBq) 2.
ANSI-64-435-454-R2 with 200 mci (7.40 GBq) i The prototype source housing was subjected to a high temperature test and drop test to simulate a fire and a subsequent detachment of the source housing from its frame support.
The outer container was damaged by the test, however, the source containment remained intact.
EXTERNAL RADIATION LEVELS:
Radiation measurements of the source housing when loaded with 200 mci (7.40 GBq) of Cs-137 were reported as follows:
Isodistance Dose Rate Shutter Contour Position inch cm mR/hr pSv/hr 1.97 5
45 450 ON 11.81 30 30 300 39.37 100
< 0.2
< 2.0 1.97 5
45 450 OFF 11.81 30 4.3 43 39.37 100 0.61 6.1
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE I
I I
l NO.-
NR-8098-D-801-S DATE:
l APR 17 )ggg PAGE 4 OF 5 1
DEVICE TYPE:
Pipe Monitor OUALITY ASSURANCE AND CONTROL:
Prior to shipment each unit was subjected to and passed an acceptable series of tests and inspections conducted by New England Nuclear.
LIMITATIONS.AND/OR OTHER CONSIDERATIONS OF USE:
- The device shall be used only by persons specifically licensed by the NRC or an Agreement State.
- The device shall be leak tested at installation, at source replacement and at intervals not to exceed 6 months using techniques capable of detecting 0.005 microcurie (185 Bq) of removable contamination by persons specifically licensed by the NRC or an Agreement State.
- Handling, storage, use, transfer, and disposal: To be determined by the licensing authority.
SAFETY ANALYSIS
SUMMARY
Installation, relocation, repair, testing and servicing was performed by John Potter Associaton until November 8, 1991, when they terminated their material's license (29-14814-01).
As of the effective date of this registration certificate, this company apparently is no longer in business.
Based on review of the Merrick-Scale Model NCPM, and the information contained in this registration sheet and the references below, we continue to conclude that the device is acceptable for licensing purposes.
Furthermore, we continue to conclude that the device would be expected to maintain its containment integrity for normal conditions of use and accidental conditions which might occur during uses specified in this certificate.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF DEVICE NO.- NR-8098-D-801-S DATE:
PAGE 5 OF 5 APR 171998 DEVICE TYPE:
Pipe Monitor
REFERENCES:
The following supporting documents for the Model NCPM are hereby incorporated by references and are made a part of this registry document.
- Merrick-Scale Manufacturing's letters dated May 16, 1979, August 16, 1979, September 4, 1979, November 1, 1979, and November 16, 1979, with enclosures thereto.
- New England Nuclear's letters dated September 28, 1979, and October 25, 1979, with enclosures thereto.
- New England Nuclear's telephone call on October 17, 1979.
- Dupont Merck's (NEN) facsimile dated February 11, 1998, with enclosures thereto.
ISSUING AGENCY:
U.S. Nuclear Regulatory Commission 99 Date:
Reviewer:
Y
""M Michele L.
Burgess I71998 Concurrence:
/
27' Date:
Stnven L.
Baggett
PAGE1 I NRC FORM 567 U. S. NUCLEAR REOULATORY COMMISSION REQUEST FOR A SEALED SOURCE OR DEVICE EVALUATION INSTRUCTIONS: Send tNs request AND a copy of all related letters /sppl6 cations and drawings to: The Sealed Source Safety Section, ATTN: CNef, OWFN Mall Stop 6 H3. Change the Ucense Tracking System milestone to 19 and assign to reviewer code I-5.
NOTE: Retain a copy of this request with the application and background files.
REQUESTER REGION / LOCATION:
[eA'/6 C[
C/tk lI 11 111 IV RV R HQ R LFDCB TELEPHONE NUMBER DATE TYPE OF ACTION REQUESTED (Check as appropriate) fpPUCANTS NAME SOURCE REVIEW AMENDMENT OF REGISTRATION SHEET umt CONTROL NUMBER (S)
DEVICE REVIEW NUMBER (S)
LETTER /APPUCATION DATE LICENSE NUMBER (S)
CUSTOM REVIEW
/JR-451 tc/-3 n h9I Y/
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FOR SSSS USE ONLY MtflEWER MODEL NUMBERS NUMBER ASSIGNED ht N! $lY $CA { C ~~ ll(fh0 DATE RECENED DATE ASSaGNED DATE TO FEES u//7/W l
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TYPE OF ACTION (Indicate the number of each type) l COMMERCIAL DISTRIBUTION (FORMAL) l USE BY A SINGLE APPUCANT(CUSTOM)
SOURCE (9C)
DEVICE (9A)
SOURCE (9D)
DEVICE (98)
NEW NEW NEW NEW
' AMENDMENT
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AMENDMENT AMENDMENT AMENDMENT v
MO SAFETY EVALUATION REQUIRED j UCENSING ACTION REQUIRED lF KNOWN NO NO FEES REQUIRED j OTHER (Spec #F)
TOTAL NUMBER OF NOTES REVIEW HOURS gh_ ]Mgricd /
NUMBER OF DEFICIENCY LETTERS NUMBER OF DEFICIENCY CALLS FOR BILLING PURPOSES ONLY NAME HANGE ADDRESS CHANGE j NEW REGISTRATION -
'J PRODUCT INACTIVE -
ADD TO BILUNG REMOVE FROM BILUNG FOR FEE USE ONLY TYPE C7 FEE FEE CATEGORY CMOUNT RECErvED
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]9A 98 9C 90
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CHECK NUMBER MATANN UPDATED f ()
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~ AS REQUIRED ry p j
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QPPROVED BY
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DATE RETURN DATE COMMENTS NRC FORM 567 (843)
ORIGINAL TO SSSS
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