ML20035F890
| ML20035F890 | |
| Person / Time | |
|---|---|
| Issue date: | 02/22/1993 |
| From: | Grimsley D NRC OFFICE OF ADMINISTRATION (ADM) |
| To: | Darrin J ALNOR NUCLEAR CORP. |
| Shared Package | |
| ML20034D437 | List: |
| References | |
| FOIA-92-565 NUDOCS 9304230021 | |
| Download: ML20035F890 (4) | |
Text
U.S. NUCLE AR REGULATORY COMMISSION
%ceoiAnuasttwyn w FOIA 565 s
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RESPONSE TO FREEDOM OF l' "
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FEB 2 2 093 INFORMATION ACT (FOIA) REQUEST o^u DOCV L T twVtil F & lif eruptsistve)
RL OUE STE R Mr. John C. Darrin PART l.-AGENCY RECORDS RE LE ASED OR NOT LOCATED (See enededboses>
No agency records subject to the it quest have been located.
No adMora! agency records subject tu the request have been locat-f l
Requested records are nadabte through another pubtic distnbution vop am See Comments section.
i Agency records subject to the n auest that are identif.ed in Appenda!fd A
i,te a'rtadv avadab+ for nubbt inspcrtion and copying at the X
NRC Pub! c Dotnert Room. 2120 L St cet, N W WasSington. 00.
b Agency recneds subject to the request that are ident%ed in Append >! M '
are teng rnade ava !ab e for, ubhc mspection and copying X
at the NGC Pubat Docur sent Room. 2120 L Street. N.W.vash n~on DE. m o f old, e under ins F OI A numbo.
l The nonpfcpr.etary version of the propasaHs) that you a ped to eat pt m a te't phone converset.on mit a member of my staf f is non bemg rnade avaUable for pubhc mssoon and copymg at the NRC Pubhc Dxument Roont 2120 L Street N W., Ms%gton. DC. <n a foide' inder this F Of A number.
Agency 'ecords sXect to the request that are ;dentihed in Apptm u e:
____ rray bf.,nsper:ted and cop rd at tSe N RC LocM Pubbc Document Room ident 1 ed i the Comments 6ection.
Enciosed is ir f ormation on how you may ot> tam accen to at the t' ms f or enp4 ' g records iocated at the NRC Pubhc Document Room,2120 L Street, N W.. Wast.nc'on DC X
Agency <etords rubjM ? to the reque st are ericlosed.
(f,endices A&B)
Records subs tt to the reauest hm been rf.ferred to anoth" FeaUat a99t vues) tor reuen and d rK! response to vou e
Fees You wm be tdied by 1be N RC for fees toth,. S You vou recewe a refund from t'ie NRC n the amaant of 5 In view of N RC's response toibis request, no fu ther action es be ng tak en on appea! letter de&d
,No r
PART 11. A-INFORMATION WilHHELD F ROM PUBLtC DISCLOSURE Certain intor +etion in the reavested records is beMs vuttheid imm Nb:n cFstiowet pursuant to the exempeens desce.t.ed in and %-
't n asons stated in Part it, B. C. and D, Any nuased pertions of the documents 4.r e ach tWy part d the *eceed es berg vot* held are be,r.g made a.baable f or pubhc irapecticn anc coning in the NRC Pubhc Document Room 2120 c Dreet N W., hturg on DC m a fotoer under this F OI A nurr.ber.
COMVE NT S eThe records identified on enclosed Appendices A and B
are responsive to your request.
Copies of these records are enclosed.
Additional records responsive to your request are continuing to be reviewed.
You will be notified promptly once this review is cowpleted.
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I 9304230021 930222 PDR FOIA DARRIN92-565 PDR
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l APPENDIX A f01A-92-565 DOCUMENTS AVAILABLE IN THE PUBLIC DOCUMENT ROOM (POR) l ND.
DATE DESCRIPTION 1.
1/79 HUREG/CR 0554:
Final Report on Pocket-sized dosimeters from Pacific NW
)
Lab. (25 pages).
t
_ccession No. 7903230032 1
A 2.
4/80 NUREG/CR 1452:. Further Testing of Pocket-sized Electronic Dosimeters (20 pages).
Accession No. 8006090446 l
3.
8/1/80 Ltr to K. f. Sinclair from S. A. McGuire transmitting Itrs (6 pages).
j i
Accession No. 8009090295 4.
5/82 NUREG/CR 2019: Third Phase of Pocket-sized Electronic Dosimeter Testing (23 pages).
Accession No. 820609021]
5.
8/4/86 Memo to Regional Branch Chiefs from R. L. Baer re: Digital Alarm Dosimeter Non-linearity (14 pages).
')
Accession No. 8608080275.
l l
6.
-10/26/89 Memo to Regional Branch Chiefs from L. J. Cunningham re: RF Interference with 'Alnor model RAD-85 Dosimeter Performance ~ (9 pages).
Accession No. 8911020223
-j i
7.
2/28/91 Ltr to John 'Wcnless from C. Hinson re: condensing moisture effects (22
)
pages).
-l Accession No. 9103210399 8.
5/22/91 NRC Form 591 (Safety Inspection) on S. K. McBryde, Inc. from 5/16 (1 page).
Accession No. 9106J70372 l
9.
5/30/91 Ltr to Cleveland X-Ray inspection, Inc. from A. B. Beach re: safety inspection on May 8, 1991 (6 pages).
Accession No. 9106200042 for enclosure 10.
6/7/91 Lir to Plant Inspection Company from R.. J. Pate re: NOV (3 pages).
Accession No. 9106240059 11.
6/14/91 NRC Region I Report No. 030-15115/91-01 on Construction Engineering Consultants, Inc. (2 pages).
Accession No. 9106270143 1
12.
8/9/91 Lir to QEST Corporation from A. B.- Beach re:-Routine Inspection of July 17-IB, 1991 (3 pages).
Accession No. 4108130079 13.
8/15/91 NRC Information Notice No. 91-49 and Part 34 (15 pages).
Accession No. 9108090210 14, 9/4/91-Lir to Westinghouse from P. D. Swetland re: Routine Inspection (3 pages).
Accession No. 9109240051
DOCUMENTS AVAILABLE:lN THE PUBLIC DOCUMENT ROOM (PDR)
[ i i
N0.
DATE DESCRIPTION i
i 15.
9/24/91 HRC Information Notice 91-60 (4 pages).
Ascession No. 9109180189 16.
12/4/91 Ltr to NV Enterprises from L. J. Callan re: NRC Inspection Report (4 pages).
l Accession No. 9112110064 i
17.
1/15/92 PN re: Century Inspection, Inc. Reported Radiography Overexposure (1 page).
l Accession No. 9201220126 l
18.
7/15/92 Lir to Western Stress from J. P. Stohr re: NRC Inspection Report (4 pages).
}
Accession No. 9207220016
~19.
7/16/92 Ltr to Midwest Industrial X-ray, Inc. from L. J. Callan re: NRC Inspection i
Report (5 pages).
Accession No. 9207210029 j
20.
8/27/92 Lir to Consolidated Engineering Labs from R Scarano re: NRC Inspection j
Report No. 92-15 (6 pages).
Accession No. 9209080035 i
21.
8/28/92 Office of Enforcement Notification (1 page).
i Accession No. 920l?40134 22.
9/18/92 SECY 92-320: Proposed Enforcement Action Against MQS Inspection, Inc., Elk 1
Grove Village, Illinois (12 pages).
l Accession No. 9209240485 I
23.
9/23/92 Ltr to Consolidated Engineering. Labs from J. B. Martin re: NOV and Proposed Civil Penalty'of 55000.00. (4 pages)
Accession No. 9210090102 24.
10/15/92 Ltr to Conam Inspection Inc from C. Norelius re: NRC Inspection Report (5-pages)
Acce}sion No. 9210260142
_I i
25.
9/24/91 Nec I-fo ma+io-No ic-91 60 (5 agas)
Accession No. 9109180189 l
t 26, 4/24/92 NRC Inspection of San Onofre Nuclear Generating Station, Ept. Nos. 50-206/92-13, 50-361/92-13, and 50-362/92-13, (9 pages)
Accession No. 92051300007 27.
7/20/92 NRC Inspection of Carolina Power and Light Company, j
Ept. No. 50-261/92-17, (18 pgs.)
Acc. No. 9208070040-1 i
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Re:
FOIA-92-565 APPENDIX B i
RECORDS MAINTAINED IN THE PDR UNDER THE ABOVE REQUEST NUMBER i
NUMBER DATE DESCRIPTION 1.
2/26/91 Memo for Multiple Addressee from Cunningham, subject:
" Condensing Moisture Effects on Portable Alarming Doaimeters, w/ attachment, (20 pgs.).
2.
5/18/92 Letter to the Editor, (3 pgs.).
l 3.
5/28/92 Ltr to Raddatz from Ohlhaber, w/ attachment, (63 pgs.).
4.
7/7/92 Memo for Multiple Addressee from Cunningham, subject:
" Health Physics Position of the Use of Electronic Dosimeters to Measure Dose of Record,"
l w/ enclosure, (3 pgs.).
5, 7/31/92 Memo for Those on Attached List from i
Combs, subject:
" Alarming Ratemeters,"
6.
12/21/92 Fax to Pederson from Heuschaefer, "Results of BWROG/RP/ALARA Survey on the
[
Use of Electronic Dosimeters, 11/92," (5 pgs. ).
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NUCLEAR REGULATORY COMMISSION
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February 26, 1991 i
MEMDRANDUM FOR:
R. Knapp, Director, DRSS, Region 1 J. Philip Stohr, Directer, DRSS, Region II Charles E. Norelius, Director, DRSS, Region III A. Sill Beach, Director, DRSS, Region IV
)
Ross A. Scarano, Director, DRSS, Region V FROM:
LeMoine J. Cunningham, Chief Radiation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation t
SUBJECT:
CONDENSING MOISTURE EFFECTS ON PORTABLE ALARMING D051 METERS
[
In May of 1990, Region IV sent a memorandum (see Enclosure 1) to the Radiation i
Protection Branch describing the f ailure of a Xetex Model 415 alarming dosimeter when it was used in a hics humidity environment at Fort Calhoun. Since follow-up
,i testing by Fort Calhoun o like model dosimeters under similar environmental conditions resulted in a high dosimeter failure rate, Region IV felt that these f ailures may have generic implications.
In response to Enclosure 1, the staff contacted Xetex to determine the cause of failure of their Model 415 alarming dosimeter. After a series of tests duplicating the environmental conditions under which the dosimeters failed, Xetex determined that their Model 415 dosimeter experienced a loss of counts when the dosimeter was used in a hot, condensing moisture environment.
The Mocei 415 cos1 meter is not designed to preclude moisture from its internal electrical components; consequently the condensing moisture atmosphere causec the cosimeter to temporarily fail. A thorough drying following this exposure returned the cosimeter to its original state.
t The Xetex Model 415 dosimeter is designed to meet specified performance criteria from -10C to 50C and from 40 percent - 90 percent humidity, as specified in ANSI l
42.17A, " Performance Specifications for Health Physics Instrumentation for Use in Normal Environmental Conditions." However, since the Model 415 dosimeter casing is not watertight, it is not intended to be used when unprotected from condensing moisture, immersion, or dripping water.
After determining the cause of failure of their Model 415 dosimeters, Xetex elected to send a product bulletin (see Enclosure 2) to all Xetex Model 415 dosimeter users cautioning them about the use of these dosimeters in harsh moist environments.
Xetex also amended the warranty statement (see Enclosure
- 3) issued with the Model 415 dosimeter to caution against use of this dosimeter i
in condensing moisture environments.
i In order to permit the use of the Model 415 dosimeter in wet environments, Xetex is in the process of designing a moisture tolerant Model 415.
It should
(
i be noted that digital alarming dosimeters made by other manufacturers may also
(
te susceptible to f ailure when used in wet environments if they are not designed to be moisture tolerant.
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Multiple Addressees
-2 February 26, 199 i
On the basis of Xetex's cooperation in this matter in identifying the reason for their dosimeter f ailure and providing this information to their dosimeter users, me do not plan to take any further action.
If you have any questions i
concerning this issue, please contact Charles Hinson of my staff on t
(301) 492-1845.
original Signe'd By:
LeMoine J. Cunningham, Chief Radiation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation
Enclosures:
As stated DISTRIBUTION:
FJCongel, NRR WDBeckner, NRR DCollins, RII RPB Reading LJCunningham, NRR RAErickson, NRR RGreger, RIII Central File JEWigginton, NRR JWNHickey, NMSS BMurray, RIV THEssig, NRR RLAnderson, TTC GYuhas, RV C5Hinson NRR JHJoyner, RI WBateman, EDO EButcher, NRR UPotapovs, NRR PDR i
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- 02/74 /91
- 02/74/91
- 02$ 791 OFFICIAL RECORD COPY Document Name:
PORTABLE DOSIMETERS i
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UNITED STATES s
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REGION IV 611 RY AN PLAZA DRIVE. SUITE 1000 i
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HAY 2 51990 Ehricsure 1 f
i MEMJMNDUM FOR:
L. J. Cunningham, Chief l
Radiation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation FROM:
Blaine Murray, Chief Facilities Radiological Protection Section
SUBJECT:
FAILURE OF XETEX ALARMING DOSIMETERS Enclosed is an evaluation by Fort Calhoun Station regarding the failure of Xetex alarming dosimeters in a high humidity environment.
It appears that this matter may have generic implications and something that we may want to discuss in an Information Notice.
2 hidtu Blaine (4urray, Ch[ef Facilities Radiological Protection Section l
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- Tom Matthews (402) 533-6857
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Cart Simmons (402) 533-6855
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' Donna Guinn (402) 533r6843
_ Scott undquist (402) 533-6611 i
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Memorandum
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C. E. Anderson To:
R. J. Sexton
SUBJECT:
Contact With Xetex and Eberline Regarding Recent Dosimeter Failure.
A phone call was made to Xetex, manufacturer of the 415B electronic desireter.
This is the model wnich recently failed while issued to Mr. Mayhew. After testing en a population of Xetex, perforred by the Instrument Group, Xetex was contactec with the results.
The conditions of the test and the instrument f ailure rates were described to Mr. Lloyd Lew. Detail was given to the humid at=schere, instrurent response, and how the conditions were attained in the calibratien facility.
The engineer said he would inform the company president of our findings.
Mr. Jeff Anspaugh, of Eberline, was also contacted and provided with identical inferr.ation. - Eterline is new the parent co;.pany of Xetex.
He also assureo that our findings muld be passed along, and that follow up informatien will be given.
r
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Chuck Ancerson Acting Radiological Instrumentation and Equip ent Coordinator CEA:cs
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35
Subject:
FAILURE OF ELECTRONIC G4 TUBE. DOSIHETERS IN A HIG APPLICATION Fort Calhoun has experienced a prebles with an electronic GM tube dosimeter /due to a high hu:sidity atmosphere. A dosicster failed to operate when placed en the chest region under a wetsuit.
desineter in a plastic bag with spenges, Tests were then conducted by placing t causing the coisture level to rise in the bag.The bag was thea heated with air The dosimeters were then exposed
+3 % a 100 cR/ min field and a high rate of failures were notec (little or no counting).
Receval frca the btg and re-exposure indicated the dosimeters returnec to norr.al operation within minutes.
Please respond to the following questions:
1.
Has this experier,ce been recognized elsewhere?
If so, how was the
[
deter =ination in.da?
4 2.
Has solid state dett-:ter electronic dosinetry exhibited similar characteristics?
INFORRATION CONTACT:
Chuck Andersen, (402) 533-6768 i
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Date: May a, 1990 FC-RP-305 90 From:
C. E. Anderson To:
R.J. Sexten N
SUBJECT:
Performance Evaluation of Xetex Alarming Dosiciaters f18026 & #13942.
Calibration Verification of R0-2 f4440 & Teletector (22700.
The fellowing :ests were perferned on Xetex f18026 assigned to Cyril Mayhew F13942 assignec to Rick Gilman on 5/5/90 using the 400Ci source r500 in the Shepnerc Mocel 89 calibrator.
A.
Ten exposures of 1 mnute each in a field of 100 cR/ min.
B.
Te ex;csures of I minute each in fields ef:
1.
150 M / min.
2.
200 mR/ min.
3.
250 M / min.
4.
300 M / min.
5.
350 mR/ min.
6.
500 mR/ min.
C.
One 30 min exposure in a field of 1200 m /hr.
The results are on the attached tables.
In each case, the alarm setpoint was set to alarm within the completed exposure.
This covered setpoints of 64, 128, 255 and 512 m.
Both units alar:ned at their setpoints during each test.
Both Xetex units were response tested between 12:05 and 12.30 A.M. on the morning of 5/5/90.
The response test is performed daily and includes:
A.
Verifying that each unit is set to alarm at 64 d.
B.
That the battery ek LED lights up and the display is functioning properlyi C.
That the physical condition of the unit is satisfactory, Each unit is then exposed to a 100 mR/ min field for 1 minute and must fall i
within a tolerance of 15%(85-115 d), must chirp properly, and be in alarm upon completion of the exposure.
If all these conditions are met, the unit is placed in service for 24 hrs.
The response test for the R0-2 f4440 & Teletector f22700 used for survey was completed just prior to the Xetex and it consists of.
i A.
A one point check at mid scale for each scale.
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l R
J. Sexton May 8, 1990 Ptge 2. FC-RP-305-90 B.
A pnysical condition and mechanical zero check. The instrument is placed out-of-service, if unsatisfactory.
i C.
A check cf the condition of the batteries and replaced if necessary.
D.
A tolerance criteria of 20% of the desired reading.
Calibration tolerances for each unit are as follows:
E.
Xetex 1.
10% of the actual value using the average of two exposures taken at three different exposure rates, a.
750 rR/hr.
b.
3 R/hr.
c.
12 R/hr.
F.
R0-2 1.
10% of the actual value at 20%, 50% & 80% of each scale.
G.
Teletector 1.
15% of the actual value at approximately 20%, 50% & SO4 of each scale except the 2 cA scale.
In cenclusion, AS FOUND data for the Teletector and R0-2 was supplied to clarify the overall performance.
Because Xetex r18025 appears to have failed to respond in the field, and the accuracy of Xetex #13942 is under question, a variety of conditions and exposure rates were chosen for this evaluation.
Between each exposure, they were shaken and tapped to see if the display would clear or if the units would quit worxing.
In each case, they continued to alarm ano display until reset r.anually.
The minicum and maximum readings were provided to verify their consistency.
After taking all data, both Xetex were sealed in a clear plastic bag, along with a small wet sponge. Two air dryers blew warm air underneath the bag for an hour to increase the humidity.
When the bag was fully steared, both Xater were exposed to a field of 100 mR/ min and 4
- 18026 had quit responding. This test was repeated three rore times with the same ruults, tapping between each exposure to determine if the problem might be a 1aulty solder joint.
The units were then renoved from the bag and re-exposec with the same results.
The cover of f18025 was quickly removed and the high voltage was checked, found correct, and upon re-exposure, the unit was found to function perfectly for each subsequent exposure.
A complete inspection of the unit found all IC's firmly seated, all solder joints clean and tidy, all wires in good condition. One pc board mounting screw was found to be a little loose. This was not concluded to have caused the problem; it is 9
4 R. J. Sexten May 8, 1990 Page 3, FC-RP-305-90 deduced that high humidity was tne cause.
when the xetex was returned, af ter remval from containment.The response stic have teen worn inside of a wet suit.
It was said to The testing of these units was perforted by Michael J. Rhoces, senior instrument technician and alternate night shift instrument supervisor.
qualifications include the following:
His 1.
19 years of experience in the electronics and nuclear industry as an electrcnics technician.
2.
Reacter operator in the U.S. Navy.
3.
5 years of excerience as a health physics technician in corrnercial plant 4.
6 years of experience as an I&C technician specializing in radiation m nitcring.
After cetermination of the dosimeter failure, further tests were conducted on a populaticn of Xetex 415B's.
isolated incident or a co:non characteristic.It had to be ascerta chosen anc exposed to a 100 mR/c:in field.
A sample of ten dosimeters were test.
See the attacned tables for values. All ten passed the initial response a tag anc the humidity elevated, as previously described.Five units at a time were Four out of five ccsimeters failed in a similar fasnien.
selectec, ano again, four out of five failed.A second group of five were next One unit, however, exhibited a different troclem.
and then failed high in the response test.The unit began counting with the pre After the units were alloweo to cool ano cry they began to respond correctly, again reaffirming the previous fincings.
The time necessary for cry out to occur varied from four minutes or The units #26219 and f11841 wnich had passed the humidity were ag
~
more.
in a tag anc heated.
Both units failed on the second trial. #13841 did not recover and exhibited component failure, after the second trial.
Presently, there are Merlin Gerin solid state electronic dosimeters en site for evaluation.
Similar tests were concuctec on these units for an indicated response to humid conditions.
ambient humidity of 42% and temperature of 74 degrees Fahrenheit were then placed in a plastic bag as previously accomplished.
These units allowed to sit in this environnant for approxistely 30 minutes prior to The units were exposing to a 100 rR/ min field.
The Merlin Gerin ESRD's are not affected by the high humidity, c of the Xeter 415B's.
The readinos w with the exception of two readinijs. ere within 15% of the indicated source Herrever, these two readings were only 4
l R. J. Sexton May 8,1990 Page 4 FC-RP-305-90 mR/ min above anticipated plus 154. This test should indicate that an indivicual sneuld not becene overerposed, unless the alarms are ignered, in a1 fluctuating environment, ifLb Chuck E. Anderson Acting Radiological Instrumentatien anc Eculpment Coorcinator CEA:cs c:
John Bobba Dave Lovett Preston Swafford 4
S 9
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l ALTACHWERT TABLES FCR ELECTROWIC DOSTHETER FUMIDITY EVALUATIOWS I
i i
XETEX # 18026 i
EXPOSURE 100 150 200 250 300 350 500 RATE d / MIN mR/ MIN M/ MIN M / MIN d / MIN mR/ MIN d/ MIN I
[ EXPOSURE 1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 HIN.
3 TIME fAVERAGE u
i 99.4 139 179.5 220.5 259 292 395.5 e.
COUNT 1
KAX 101 140 181 221 260 293 395
_ COUNT i
l MIN 98 138 178 220 258 291 395 l COUNT w
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The 3D cinute exposure at 1200 $ /hr resulted in a reading d___
YETEX #13942-
! EXPOSURE' 100 150 200 250 300 350 500 I
RATE M/ MIN mR/ MIN M / MIN mR/ MIN
$/ MIN d/ MIN mR/ MIN i EXPOSURE 1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 HIN.
1 TIME i
iAVERAGE I
4 97.6 145.5 1E8 234 274.5 313 433 COUNT 1
l i
HAX 101 140 181 221 250 313 I
433 COUNT l
MIN 98 138 17a 220 258 313 433 COUNT nzr - _ _ --
The 30 minute exposure at 1200 d /hr resulted in a reading of 603 d.
I 9
i FIRST TRIAL OF FIVE IETEX 415S S/N CCNTROL AFTER HUMIDITY AFTER ORY INCREASE OUT 15468 94 rA l
0 es 1 109 rA Il 13280 99 rR l
0 rA 96 rA l
13585 108 rA I
O cA 93 rR l
i 26333 l
92 rs_
i 0 rA 94 rnR l
._.__2_6 2_19
--l 99 nR l
101 rA 101 :nR SECOWD TRIAL OF AW ADDITIOWAL FIVE XETEX a n-.---
415B S/N CONTROL AFTER HUMIDITY AFTER ORY INCREASE OUT 105 95 rA I
3212 rA l
92 rA I
21605 l
92 cR l
0 rA l
96 cA
[
26250 l
91 cA l
0 nA 93 rA J
l 25297 100+cR l
0 rA I
102 rA l
_ 13841 l
92 rA l
9B cA l
0 rA l
EVALUATION _OF MERLIN GERIN UNDER HIGH HUMIDITY COWDITIOWS Ambient Temarature and Humidity Unit 1 l
110 l
112 110 108 l
Unit 2 109 111 110 109 1
_ Unit 3 113 112 l
109 l
109 I
Mgh Humidity and High Temerature Unit 4 114 119 119 l
114 l
Unit 5 107 10B 110 107 l
Unit 6 106 106 106 106 1
TCRT CAI.HOUN STATION J.,:3 RATION FORM L
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houk Gal $bc.ir.,s. -Perfe s0 kev to cal.!D!!ATION Audible Signal Chirping with dual sate thin unit has l>een cattbrated at the factory and should switch to select i or ernlotain the slecirleil accuracy over the life of the 25 cisites per aJt.
Con-I n' l e imen t.
Althonrth ente.has been taken in the design tinues above 1500 R/h ni tha dosleclar and in the quallrication of components u:cd. tentlurer; affecting accuracy can occur and calibra-itsnge 0 - 9999 mit tion must te checked periodically to assure that the Display 4-digit LED (push-treci r ted accin n. y is t+ tog avsintained in use button activated)
To check enilbration, the unit should be set up on a controls On ogt switch, battery-Cs 1.U or Co 60 range at en exposure rate of 70 to 100 test / display button, imit/b. The donimeter taust t>e oriented with (Ise long axis chirp rate switch, reset p1 the c.11 tube perpendicular to the raillation besse.
In 1,utton this unit, the long axis or the tute is parnllel to the operating Te.perature
- 20 to 5 C
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long diennsion nf the case and is located d" in from the alebt side of the case (when looking at the belt ettp)
Battery Life 6 months (typical with nt edd-thlchness. The active volume of the tube is about ItN 1604 alkallae in nor-3/0" long with its center 1-3/fe" rrosi the battery end or isal use). Coloo go thn case, i
bettery is stitt good Heinos y Dosletter stores dose The occurecy of the device is deterielned by incasuring until protected buttoa the time interval between reglatered increments. These enn be asensured at a distance by timing the dostoieter is depressed chis ps witti the ClllllP llAIE sultch in the L position.
sta a l.iu.i us t e 15 R/h (typical)'for 1he true dose inctessent size (uctual exposure per incre-rated accuracy asent indlentlun) la given by eaultiplying the tl=e Intervat Dlamen s ions 2-l/4**
- 4-I/32" 8 I" In t.ours by the actuat exposure ante in mil /h. If the dose (57 m 110 a 25 ass) i nc r esuent is not correct within the spectried accuracy, instruownt fatture is likely, necesaltating repair nod 2
Weight 6 a. (. D kgy calibration of the unit before further use.
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s RP EQUIPMENT HISTORY CARD EOUIPVENT MANUFACTURER CALFREQUENCY DATE l OAL AEP PARTS REQUIRED 4 /s fl1re I / i ,) = t - H e i / i = = _H., _ _ e I 1L*eAvr - acar e u n q,,,q ,,, e i i 6 t I i 4 i t } t i 7 i t i L JEL No. SERIAL NO.18026 RP EQUIPMENT HISTORY CARD ECUiPMENT MANUFACTURER CAL FREQUENCY cATE I cat REP l aAars neCu:Rea m.._,, I i l (' I t I i --\\ i I i i i i i i i e i i t i i t l 4 1 I i i I i uo:Etno. 41SB sEmrt No.13942 J l a
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- c:51 >iTE^ t cE) 7;5-6776 "A
Ehclesure 2, PRODUCT BULLETIN XETEX HODEL 415 MANUAL DOSIMETERS Ascently, a Xetex Mocel 415 manual cosimeter user exoerienced a icss cf counts when the cosimeter was used in a
- hot,
~' condensing moisture e nvi ronme nt.- The user tested several Xatex Mocal 415 ccsimeters and found them to excerience sin 17ar croclems in a high temocrature, concensing moisture l environment. The Xetex Model 415 dosimaters are not cesigned to exclude moisture from intsrnai eiactrical ccmponents anc, therefore, shovic not be usec wnen unprotecte from condensing moistLre, immersien, er criccing water. A watertight container can be usec to cretect the unit if the user so cesires. (Some users hava usec clastic tags co protect Model 415 dosimeters frca ccacensing moisture.) However, Xetex cannot encorse the use of any protective enclosure since no tests have been cerforced by Xetex tc ensura the integrity of any watertight enciesures. The Xetex Mocei 415'cosimeters have proved to be
- reliaole, rugged instruments in the nuclear industry.
When testec in acecreance with the methedclogy of ANSI 42.17A " Performance Scecificatiens for Health Physics Instrumentaticn for Use in Normal Environmental Conditions", which defines normal environment testing parameters, Xetex Hodel 415. dosimeters have been demonstrated to meet specified performance criteria from -10 C to 50 0 anc from 40%-90% humidity. i The caution about use in harsh moist' environments does not preclude the use of the instruments in normal indoor and outdoor environments. In fact..Hodel 415 instruments not i only perform' in normal environments, but do not exhibit permanent damage from hot, condensing moisture environments. If the dosimeters are subjected to condensing
- moieture, thorough drying will return the instruments to their original state.
i t i e e O e me e. 6 k.
t Ja* it '91 10:51 Af. tex (408) 745-6776 p,, d16 M AKJt46 L i WARRANTY This instrument is warranted against defects in material or workmanship for one
- year, excluding batteries. provided that it has not been abused or tampered with or repaired by the customer.
Itoortant: Damage caused.sy battery leakage is not covered under this wai i anty. Consecuently, remove the battery whenever the instrument is stored for long periods to avoid the possibility of damage. Contact XETEX, INC. for instructions before returning for warranty service. All repairs or replacements under. the abovs l warranty are FOB the XETEX factory. Because of the special care required in removal j and replacement of MOS integrated circuits, it is suggested that defective instruments be returned for repair to XETEX., INC.,.1275 Hammerwood Avenue, Sunnyvale. CA 94089. The Model 415 dosimeter is not designed for use in condensing moisture environments. Loss of counts will occur if the inside of the instrument becomes i wet. The instrument will recover normal function after drying. i 4 er O L 4 k +- 4
- As 23.s
- :c:EI >ITEx (4c5) 7e5-5776
\\ ..c.; ? t j15 f4 AtatA A L l t 8 1 GENERAL SPECIFICATIONS 5 Radiation Detecrec X anc gamma rays i s Detector Halogen-cuenched, filtered GM tuce l Accuracy 5% cf indicatec cose referred to Cs-137 i f Energy Depencence 5% from 60 key to 1.3 MeV gammas i l Disolay Four digit LED, and battery { test light Memory Dose levels stcred until pro-tected reset button is pushed Operating Temperature -20 to 50 C [ t Battery 9 V alkaline battery Battery Life Six months in normal use t Dimensions 4 = 2.3 x 4.34 x 1.1 inches (58 x 110 x 28 mm) B : 2.3 x 4.94 x l'.1 inches (SB x 125 x 28 mm) Weign: A = 6 cunces (170 g) B : 7 ounens (198 g) 1 Controls A: on-off switch, display / l battery test button, chirp rate switch. and reset button B = on-off switch, display / battery test button, chiro rats switch, reset but-ton, and alarm set switch
- Some units
-Do not use instrument in condensing moisture environment-1 i 4 .9 "*'t* = = * * * - = - - - =.. .4 = ~ - ~ i 1}}