ML20217A300
| ML20217A300 | |
| Person / Time | |
|---|---|
| Issue date: | 04/15/1998 |
| From: | Steven Baggett, John Lubinski NRC |
| To: | |
| Shared Package | |
| ML20217A285 | List: |
| References | |
| SSD, NUDOCS 9804220227 | |
| Download: ML20217A300 (8) | |
Text
I REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE
{
4 NO.: NR-8100-S-801-S DATE:
art 151998 PAGE 1 OF 6 SOURCE TYPE: Smoke Detector Source MODEL:
AMX-1100 Foil MANUFACTURER / DISTRIBUTOR:
EAD Metallurgical, Inc.
71 Pearce Avenue Tonawanda, NY 14150 ISOTOPE:
MAXIMUM ACTIVITY:
Americium-241 250 microcuries/cm (9.25 MBq/cm) 2 2
LEAK TEST FREOUENCY:
6 Months j
PRINCIPAL USE:
(P) Ion Generators, Smoke Detectors CUSTOM SOURCE:
YES X
NO L
l 9804220227 980415 PDR RC
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SSD pop I
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO : NR-8100-S-801-S DATE:
PAGE 2 OF 6 APR 151998 SOURCE TYPE: Smoke Detector Sourca DESCRIPTION:
The Model AMX-1100 sealed source consists of americium oxide uniformly distributed and sintered in a pure gold matrix which is further contained between a backing of gold coated pure silver and a front covering of gold electroplated with rhodium and fabricated by hot forging methods.
The continuously welded metal layers are rolled so that the minimum thickness of the layers are:
Rhodium.................. 0.0005 mm (1.97E-5 inch)
Gold..........
.......... 0.001 mm (3.94E-5 inch)
Amerjoium oxide.......... 0.0005 mm (1.97E-5 inch)
Gold..................... 0.0005 mm (1.97E-5 inch)
Silver substrate.........
0.2 mm (7.87E-3 inch)
Subdivision of the rolled foil is accomplished by cutting or punching into discs of 2-10 mm (0.079-0.394 inch) diameter or rectangular strips of 3-10 mm (0.118-0.394 inch) per side.
At the activity loading specified above, there is no loose contamination above the wipe test limit of 0.005 microcurie (185 Bq).
Mounted foil sources of the AMX-2100 series consists of AMX-1100 foil discs (2.36 to 6 mm (0.093 to 0.236 inch) in diameter) and various brass or stainless steel holders.
Brass holders are either tin or nickel plated.
The two basic types of holders employed are brass or stainless steel cup-like holders and brass or stainless steel plate-like holders.
I In the cup-like holders, the foil disc (usually 5 mm (0.197 inch) in diameter) is seated in a 0.762 mm (0.030") deep cup and the surrcunding walls are machine crimped over the disc's edge.
In a recond cup-like holder a thin portion (0.381 mm (0.015")) of the wall above the foil seat is pushed slightly down and inward with a forming tool narrowing the opening and positively locking the foil discs.
In a separate operation, the outer walls are flanged outward to provide positive locking of the holder to the plate.
In plate-like holders, sources are placed into a shallow 0.127 mm (0.005") recess created in one plate.
A second plate is positioned over the source.
This cover plate has ears protruding through the first plate which are folded over, thereby pressing and locking the source in its seat.
In a second plate-like holder two plates have two holes through which rivets are placed and are impact riveted together.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-8100-S-801-S DATE:
APR 151%8 PAGE 3 OF 6 l
SOURCE TYPE: Smoke Detector Source.
DESCRIPTION: (Cont.)
The Model AMX-1100 may be mounted in the following holders:
l AMX-2101, AMX-2102,.AMX-2103, AMX-2104, AMX-2105, AMX-2106-1, l
AMX-2107-1, AMX-2112-1, AMX-2122-2, AMX-2132-1, AMX-2142-2, AMX-2152-2, and AMX-2162-1.
l LABELING:
1 1
Neither the foils nor mounts are labeled.
l DIAGRAM:
See attachment 1.
CONDITIONS OF NORMAL USE:
Both mounted and unmounted foils are designed for use in either residential or industrial smoke detectors for use at ambient temperatures and pressure.
PROTOTYPE TESTING:
Prototype Model AMX-1100 blanked sealed sources had been tested to conditions described by ANSI Standard N5.10-1968 and classification of C52222 had been demonstrated.
Results of wipe tests of the tested foils were acceptable to less than 0.005 microcurie (185 Bq).
Model AMX-1100 foils experienced the following additional tests:
1.
Immersion in water of prototype foils for 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> at 50 *C l
(122 oF) : less than 0.001 microcurie (37 Bq) per foil loaded 2
a at 62 microcuries/cm (2.29 MBq/cm ) of foil was found in the water.
2.
Immersion in 0.1 N hydrochloric acid for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at room temperature: less than 0.003 microcurie per microcurie (0.003 Bq/Bq) activity was leached out.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.- NR-8100-S-801-S DATE_:_
AMI 1 5 1998 PAGE 4 OF 6 SOURCE TYPE: Smoke Detector Source DESCRIPTION: (Cont.)
3.
Saliva was applied for one hour, fcils were washed and wiped:
less than 0.0005 microcurie / microcurie (0.0005 Bq/Bq) was removed in the wash water and wipe.
4.
Foils were subjected to tests in sulphur dioxide and hydrogen sulfide, less than 0.005 microcurie (185 Bq) wipable contamination was found.
AMX-2100 Series mounted foils experienced the following additional tests:
1.
Vibration tested at 1700 vibrations per minute in three axis with 19.05 mm (0.75") amplitude for a period of three hours.
No mounted source suffered any mechanical deformation and/or foil source was ejected from its holders.
Foils were wiped and removable activity did not exceed 0.1 nanocurie (3.7 Bq).
2.
Sources were individually positioned on a steel block 76.2 x 127 x 25.4 mm (3" x 5" x 1") and a weight of 20 lbs (9.06 kg).
with flat impact surface of 76.2 x 76.2 mm (3" x 3")
was allowed to drop onto each source from 1.52 m (5 feet).
The mounted sources were subjected to impact both on their side as well as their front.
No foil discs were ejected from its seat in the mounting and wipe tests in all cases did not exceed 1.2 nanocuries (44.4 Bq).
Prototype sources were subjected by the manufacturer to high temperature tests of 1200*C ( 219 2
- F).
Test results show that the worst case release from any source did not exceed 0.1 percent of the original source content.
Thus the tested sources would be expected to maintain containment integrity under high temperature conditions likely to occur in storage, transportation or use.
EXTERNAL RADIATION LEVELS:
EAD reported the following dose rates from unshielded foils:
at 1 cm (0.39 in)...... 0.75 mR/hr (7.5 pSv/hr) per microcurie at 5 cm (1.97 in)...... 0.13 mR/hr (1.3 pSv/hr) per microcurie
)
at 15 cm (5.91 in)......
0.012 mR/hr (0.12 pSv/hr) per microcurie
{
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO,;. NR-8100-S-801-S DATE:
APR 1 51998
^
SOURCE TYPE: Smoke Detector Source I
OUALITY ASSURANCE AND CONTROL:
All of the Model AMX-1100 sources were checked by gamma counting to ensure that the activity in each foil was within specified limits.
Each source was wipe tested to an acceptance limit of 0.005 microcuries (185 Bq).
In addition to the above, each Model AMX-1100 foil was checked by alpha spectrometry to determine the adequacy of the gold cover.
Manufactured lots of mounted foil sources were subjected to visual inspection (AQL 0.65), radioactivity content (AQL 0.65), ion current (AQL 1.5), and removable activity test, i.e.,
wipe test (AOL 1.5).
Wipe test filter paper specimens test limit for removable activity was 0.1 nanocurie (3. 7 Bq).
LIMITATIONS AND/OR OTHER CONSIDERATIONS OF USE:
Source and source holder combinations shall only be used by specific licensees of NRC or Agreement States.
Handling, storage, use, transfer, and disposal: To be determined oy the licensing authority. Sources should not be l
handled with bare hands.
This registration sheet and the information contained within the references shall not be changed without the written I
consent of the NRC.
SAFETY ANALYSIS
SUMMARY
Based on our review of the information and test data contained in the correspondence cited below, we continue to conclude that EAD Metallurgical Model AMX-1100 foil sources are acceptable for licensing purposes.
Our conclusions were based on prototype test data which shows the ability of the foil source plus mounting to withstand environmental and other factors to which they may be subjected to when used in residential and industrial type smoke detectors.
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.- NR-8100-S-801-S DATE:
APR 151998 PAGE 6 OF 6 SOURCE TYPE: Smoke Detector Source
REFERENCES:
The following supporting documents for the Model AMX-1100 foil source are hereby incorporated by reference and are made a part of i
this registry document.
- EAD Metallurgical, Inc., letters dated June 1, 23, 1977; 1
July 19, 1977; August 31, 1977; September 8, 15, 30, 1977; October 6, 1977; November 10, 1977; April 21, 1980 and December 19, 1980, with enclosures thereto.
ISSUING AGENCY:
U.S.
Nuclear Rec;ulatory Commission p,
~
APR 151998 Date:
Reviewer:
/
j
'J6hn W.
Lubinski Date:
- FN 1 5 1998 Concurrence:
8 S'teven L.
Baggett
REGISTRY OF RADIOACTIVE SEALED SOURCES AND DEVICES SAFETY EVALUATION OF SEALED SOURCE NO.: NR-8100-S-801-S DATE:
ATTACHMENT 1 pg ) g ggg FIGURE 1 (Not to Scale)
ELECTROPLATED RH001UM M0.5 um 0134ACTIYB MARGIN INOWIf GOLD LAYER.~1 um ACT!YE LAYER ae.$ um GOLO LAYER.*0.5 um
$1LVER SUBSTRATE, a.0.2 as
_=
'#/ / f f f f f f f f f4 SECT 10W A.A AMX - 1100 ALPHA FOIL FIGURE 2 (Typical EAD Source Holder)
NG-2101-1.0 AMX-2101-2.0 0.220" Dia.
l
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ULM/Zf4Ay, Tin Plated f 5 nun.
Brass Holder DiiC"
)
(
- E-1100 Foil Disc 1
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PAGE1 NRC FORM 56T U. S. NUCLEAR REGULATORY COMMISSION REQUEST FOR A SEALED SOURCE OR DEVICE EVALUATION U
e, INSTRUCTIONS: Send thee request AND e copy of all reisted letters /spphcot6one and drewtnge to: The Seeled Source Safety SectionfATTN: Cheef, OWFN Mail Stop 6 H3. Change the Ucense Tracking System milestone to 19 and seeign to reviewer code I-5.
r0 NOTE: Retain a copy of INe request wth the application and background filee.
J2 a oussTEN REGION / LOCATION:
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//76 A /!L M 41'(.A /, h,
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R ll lil IV UV RH i R LFDCB TELEPHONE NUMBER DATE TYPE OF ACTION REQUESTED (Check se ', @e) 4 APPUCANTS NAME SOURCE REVIEW AMENDMENT OF REGISTRATION SHEET MAIL CONTROL NUMBER (S)
DEVICE REVIEW NUMBER (S)
LETTER / APPL TION UCENSE NUMBER (S)
CUSTOM REVIEW
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Y FOR SSSS USE ONLY REVIEWER MODEL NUMBER $
NUMBER AESIGNED k/N ~ //O O hl
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DATE RECEIVED
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DATE ASSIGNED DATE TO FEES j
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TYPE OF ACTION (Indicate the number of each type) l COMMERCtAL DISTRIBUTION (FORMAL) l USE BY A SINGLE APPLICANT (CUSTOM)
SOURCE (9C)
DEVICE (9A)
SOURCE (90)
DEVICE (98)
NEW NEW NEW NEW 3MENDMENT
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AMENDMENT AMENDMENT
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AMENDMENT jNO SAFETY EVALUATION REQUIRED j UCENSING ACTION REQUIRED IF KNOWN NO NO FEES REQUIRED
] OTHER (Spec #K)
TOTAL NUMBER OF NOTES gg Md.d REVIEW HOURS s
NUMBER OF DEFICIENCY LETTERS NUMBER OF DEFICIENCY CALLS FOR BILLING PURPOSES ONLY j NEW REGISTRATION -
J PRODUCT INACTIVE -
NAME CHANGE ADDRESS CHANGE ADD TO BILUNG REMOVE FROM BILLING FOR FEE USE ONLY TYPE OF FEE FEE CATEGORY k TD
/V 9A U 98 9C 90
+
W AMOUNT RECENED 4'
CHECK NUMBER MATANN UPDATED g _#
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,A AS REQUIRED CATE OF CHECK
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