ML19224B674
| ML19224B674 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 06/11/1971 |
| From: | Bailey Meter Corporation, Metropolitan Edison Co, Westinghouse Electronic, Tube Division |
| To: | Mullinix W NRC/IE |
| References | |
| PROC-710611, TM-0347, TM-347, NUDOCS 7906180084 | |
| Download: ML19224B674 (21) | |
Text
{{#Wiki_filter:1 .g TMI DOCLENTS /"O% DOCUMENT NO: COPY MADE ON 2 0F DOCUMENT PROVIDED BY "I i METROPOLITAN EDISON COMPANY. R Wilda R. Mullinix, NRC 790.6180024 ) T 226 m
_t t BAILEY HETER CORPORATI0ff INSTRUCT 10fiS AND HANDLING PROCEDURES FOR WL-23636/WL-23636A/WL-236363 POWER RANGE UNCOMPENS ATED 10NI ZAT10N CHAMBER SU PPLI ER: WESTINGHOUSE ELECTR0tilC TUBE DIVISION _/")f iAR -fsvg .'d :L~, *: u:-=='+" .. -j ~ ~=
'.-4 L 3 m INSTALLATl0tl At1D HAtJDLING PRCCEDURES FOR WL-23636/WL-23636A/WL-236368 POWER RANGE UNCOMPENSATED 10NizAriUN CHAMBER .R d DRAWING NO. E-2178 a ~ SUPPLI EP, - WESTINGHOUSE ELECTRONI C TUBE DIVI SION BOX 284, Elt.iiRA, NEW YORK 14902 ~ ~ ' - TELEPHONE: (607) 739-7951 15 7 - DATE: February 16, 1971 22f Lg REVISED: June 11, 1971 ~ .?c ~ ~. . NS $ $ .-,. :1MJ-l ...;;: E-d'-&. _.
(ABLE OF CONTEt(TS Detector DescrJptNn SECTI0tt 1 SECTION 2 Functional Description SECTION 3 Installation Precautions 3.1 Unpacking 3.2 Handling 3.2.1 ceneral Handling 3.2.2 Handling During Installation into the Detector Well 3.2.3 Lowering the Detector into the Vell 3.2.4 Suspended Detector in Detector Well 3.2.5 Colling of M1 Cables in Detector Well Af ter installation 3.3 Storage. SECT 10tl 4 Electrical Pretesting 4.1 Equi pmen t ~. 4.2 Uncompensated t oni zation Chamber Resi s tance and Sensi tivi ty Test 4.2.1 Resistance Test for Posi tive and Signal Electrodes (Top & Bottom) 4.2.2 Vol tage Sensi tivi ty Tes t ~ SECTION 5 ~ ~ Testing Af ter installation 5.1 Uncompensated Ion Chamber SECT 10tl 6 Fi eld Proble:n Tes ts 6.1 Resistance Test 6.2 Vol tage Saturation Curve lYb ) s._ s '"* fA,= W
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LISTING OF ILLUSTRATIONS 1 Figure 1 Resistance Test Electrical Diagram 2. Figure 2 Vol tage Sensi tivi ty Test Electrical Diagram 3. Figure 3 Typical Saturation Curve for lon Chambers' 4. Data Sheet for WL-23636/WL-23636A/WL-236368 Uncompensated Ion Chamber 5. Figure 4 Triax-Coax Adapter Shielded Box 6. Figure 5 Coax Shielded Adapter Box 7. Figure 6 Colling of Cable in Detector Vell 8. E Drawing - General Assembly = (ii) 1 59 2 2 6 fRssf 4 'e k, .$-5$ N . : - : TQ .;; 2, =EiN&,
'SECTION 1. DETECTOR DESCRIPTION The Power Range Uncompensated lenization Chamber Assembly, WL-23636A, Is a WL-23497 Uncompensated Ion Chamber installed in a housing. It is equipped wi th insulators and li f ting cables. The WL-23636/WL-23636A/ WL-236363 is constructed wi th integral triaxial mineral filled cables covered with insulating sleeving its full length for insulation purposes. The WL-23636 cable terminates with a Gremar triaxial connector Type 19387 and the WL-23636 A & B terminates with an Amphenol triaxial connector Type 53175-1C03. The connector has been sealed with an epoxy to make i t moisture tight. The mating Amphenol or Gremar connector (#52975 and //19414-1, respectively) is furnished with the detector for field I ns ta l la ti on. SECTION 2. FUNCTIONAL DESCRI PTION The functional description ef the WL-23636/WL-23636A/VL-23636B Power Range Uncompensated lonization Chamber is described in the data sheet supplied wi th these installation instructions. SECTION 3. INSTALLAT!0tl PRECAUTIONS 3.1 Unpacking Examine the packing crate to ensure no visual damage has occurred during shi pment. I f damage has occurred to the ~,:- packing crate, and external damage has occurred to the detector, it should not be installed, but a carrier inspectic n report should be obtained and $dETD should be contacted to obtain an RMR (Return Ma te. ial Report) before returning the detector. (1) JLw 226 F3 ~ ..~_ . _.ZJ. m e. - anM " ;.f.2,-} f.
~ If the detectors have been damaged internally, this should shew up in the el ec t ri ca l rrete<tino r-r Instructions destion 4 'er any d o.. a g e is round, the detector should be returned to 6d ETD af ter ob taining an RMR f rom (2) ET0. The packing list should be checked to ensure all components are included plus a copy of the detector test data. Do not discard shipping c. ate until all physical and electrical checks have been made and until uni ts have been installed in the plant. They may be required for return shipment or storage until uni ts ar,e put into use. 3.2 Handling 3.2.1 General Handling The detector assembly should be handled carefully to avoid internal damage that could be caused by bumping. The detectors are made of reactor grade aluminum which is very sof t and can easily be marred or dented. The detector utilizes ceramic ' Insulators which could be damaged if the detector received a severe shock, it is suggested a minimum of two people handle the ~ detector at all times. During handling, special attention should be paid to the cables protruding f rom the detectors. The mineral filled cables are rugged, but should be handled carefully to minimize damage especially in the connector end. The cables are termina ted wi th a --...c-to-metal seal internally in the connector and care should be taken to avoid banging the connector during handling. ~ m 226 igg ~ n' ;>, .. a-6 6 - T ' :.,. Y N'5 f .~ :; ;
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3.2.2 Handling During Installation into the Detector Well The suggeste1 metho.1 for
- h. wiling ifuriou Installation int:3 the well is to use a block and tackle i n conj unc tion wi th the overhead crane for lowering the detector 'nto the well. The overhead cr,ane is used for the long travel of the housing.
When the detector is close to the well, the block and tackle should then be used thus giving the person installing complete control. Care should be used at this time to avoid hard bumping of the ceramic insulator, on the detector, when align-Ing the detector with the well. When the detector is being lowered, it is recccmended the MI cables then be uncoiled, or straightened, as the case may be. 3.2.3 Lowering the Detectcr into the Well When lowering the detector into the well, be sure to use the wire rope attached to the detector and avoid using the cables., for lifting or lowering the detectors. The wire cable is electrically isolated from the detector housing by a ceramic insulator. After installing, i f the uni t is not suspended, the slack lif ting cable should not be allowed to f all free in the well possibly shorting the detector to the well. All loose slack in the lifting cable should be emoved and secured in the top of the detector well. (3) I b2 ~ ?26 Po ~ .ry,
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~ 3.2.4 Octectors wi th Li f ting Plate and Cabies Some detectors have a lif ting plate and cable f rom which the detector is suspended in the well. This height has been preset at @?) ETD. I f the length needs adjusting, please note the locatico of the center line of the detectors has been marked ca the outside of the detector. Thi s should be used as the reference point for measurement. 3.2.5 coiling of Mi cable in Detector well After installation This cable is very rigid and will maintain a permanent bend. It is suggested the following procedure be used when colling excess cable in the detector well. (a) With the cable held rigid using the lef t hand, start bending the cable and coil as shown in Figure 6. Minimum bend diameter is 3 inches. (b) Connect the field installed cables to the connector and cover the connectors wi th silicone tubing, Type Ben Har 1258-1, 3/4" 00 X.035 wall, for insulating purposes to prevent possible ground looping. 3.3 Storage The detectors should be stored in a heated dry area when not Avoid any area where the housing may be bumped or in use. damaged due to excessive traf fic might occur. The detectors should remain in the shipping container until ready for installation. hD' (4) 226 @ .~ O~ _. _,nq 2.y - q _ =_2
SECTION 4 ELECTRICAL PRETESTING 4.1 E;oi+ cot ev. 2 t >.,. t y t s.. Nst3c J -IVVD Vdc het thlei M.2 de ' 246 or equivalent. Keithicy Electrometer 6006 or equivalent. Ohnneter - Simpson Type Mul timeter. Coaxial Cables wi th fi ttings to match, megohm bridge, Keithley electro,eter and power supply. Triax cable with coax adapter. Triax and coax tyoe junction box as shown in schematic Figures 4 & 5. WARNING: I n the electrical setup in Figure 1, the Keithely 600B will float above ground at the potential of the applied voltage. Also, the connector on the coaxial junction box. and cable will also be at power supply potential. The electrometer must be electrically placed above ground. Setting the electrometer on a pad of paper will accompli sh this. Personnel should use such Instruments as fuse puliers or insulated screwdrivers when operating the electrometers. When changing scales, it is recommended the shorting plug on the electrometer be used and the power supply shut of f rather than touch the electro-meter while it is energized. I f a Kei thley Model 602 electrometer is used, the outer case will not be above ground potential as i t has a triaxial input and was designed for thi s type of application. It is recon; mended the electrical leakage of the system be measured 226 4FI - -. ~. - cs) ( 3f g .2-.n EC - :h. E = TMy r. ,- - ;.j; J,.Eg]
before connecting th-detector to ensure the meter and cables are properly i<,olated and have good resistance. 7 gi. a aind V,s t t a.,a i inNi Mo.: t f e..' ' ' '. v
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f.. o; s t i.*.i Sensitivity Test _. 4.2.1 Resistance Test for Posi tive and Signal Electrodes _ ITop and Bottoml Positive Elect ode - Connect the posi tive cable f rom the detector to the triax Junction box as shown in Figure 1. Connect the coax junction box to (D) position and short out (E). This condition measures the center conductor to i nner shield resi s t'ance. Apply 1000 Vdc and rw e the II anddetermineresistance(ohms),Aminimumof10 current Ohms should be observed. Shut off the power supply and connect the coax junction box to (E). DO NOT short out (D). This measures the inner to outer shield resistance. With 100 volts applied, measure the current on the electrometer 0 and determine resistance. A minimum of 10 Ohms should be observed. Signal Electrode Too and Bottom. Connect the signal electrode cable as shcwi in Figure 1. Repeat the readings taken on the posis i e electrode except usc +100 volts on the signal electrode !2 and the inner-outer shield. The limi ts for thi s test i s 10 0 Ohms on the center-wi re to inner shi eld Signal A and B and 10 3 3 Ohms on the inner-outer shield. 226 W ,226 . g ( (6) i Y r== . - 142=? .3Al2 -[Q
~ 4.2.2 Voltage Sensitivity Test _. Connect the positive ciectrode and top signal electrode as shown in Figure 2. Energize the power s appiy to +1000 vol ts. and set the Keithley to 10-8 range and.1 on the mul tiplier. Now va ry the power supply voltage slightly and observe the Kei thley el ect rometer. I f the detector is voltaga sensitive, a sharp deflection on the Keithley will be observed. This indicates the detector is functioning correctly. If no deflection is noted, recheck the circui t as shown in Figure 2. I f no response i s present af ter rechecking, ei ther a signal electrode or positive electrode is opened. The detector should not be installed but replaced. Connect the bottom signal electrode cable in place of the top signal electrode cable. Repeat the above test. If all electrical tests are satisfactory as in 4.1 and 4.2 the detector is ready for installation into the detector well. ~ 22b (7) } (a Ce 22 N
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SECTION 5. _ TESTING AFTER INSTALLATION 5.1 _U_ncompensated lon Chamber. After i n s t i l l.' t i. n. the on..vyan s a t eil 3 'n th wol'ei = h wil l a l ai' be tested again for resi s tance end vo' tage sensi tivi ty as described in Section 4. If the readings are satisfactory, the cables should be connected and the resistance and voltage sensitivity test be read again at the instrumentation panel, i f the readings are sati sf actory, the detector shoulo be connected to the. readout equipment and the detector tested per the procedure de m *k. In the technical equipment marual. I s b e (8) gn, ~= j / 6> 7 ~% . SA ?,'$.
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_= SECTl0ft 6. FIEl.D FR08 TEM TEST 6.1 Resistqnce Test. ir. .,;,i...... .........,....,.,.a i....,. v... t. de s c r i t,e d in Section 4 should again be performed to ensure the detector and cable r'sistance are satisfactory. The resistance at this point may appear lower as the detector is in a g: ma sackground. 6.2 Vol tage Satu ra tion Cu rve. A vol tage-current. saturation should be taken wi th the detector unnected as in Figure (2) for Signal Top and Bottcm in 10 volt. steps between 0 and 100 volts and 50 volt st_c s between 100 and " 0 volts The saturation curve should be campared to a typical curve. Figure (3), for the current level measured. I f the rc. ;ings vary greatly f rom the typical curve, the dats should be sent to @ ETD for analysis or ~ phoned to @ ET3 ii t*rre does not permit. A voltage sensitivity test, Figure (2), should be taken also, wi th 0 to 10 vol ts on the HV to ens ire the detector is not saturated, and to make sure the detector is still voltage sensi tive on bo:h signal volumes. These readings should be taken while the eactor is at power. If readings are taken in shut down gamma, the current levels will be very low and the detector saturated very quickly. s j, (9) 2 2 2 6 }l fab YNW 4,-Y- . - - Eh
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VL236366- ' June 16, I PRC L illi tlARY INFORMATION .fAC E.I { 'THE WL 23636/ul236%A/UL2363'6B OfiC0f tPEllSATED 10fil ZATl 0N CHAliBER The WL23636/WL23636A/WL23636B i s a.'two sec t ion. uncca.npensa ted,.ionizat ion chamber assembly. The assembly consi s ts of a long, uncompensated,, ionization chamber wi thin a' ~ cabic and housing s t ruc ture. The chamber corisi sts of two hron coa ted sensi t ive voJ umes,. wi th a common hi gh vol tage elec t rode a'nd individual' signal ciectrodes. Each.clectrode is connected to.the center wi re of a triaxial cable, The case of t'he chamber is electrically isolated from_the housing struc-ture ond~is connected.to the inner shield of the triaxial cable. The housing structure ip electrically isolated from.its surroundings and is conner.ted to the outer shield of the triaxial. cable. The entire housing and cable structure i s'. hermet i ca l ly scaled.and i s he l ium leak tested. The triaxial cable is scaled a t each cr>d wi th t ri axial, cerami c to metal seals..The chamber and i ts housing are constro-ted from 1100 aluminum and employ alumina ' ceramic insulation throuch-out. The cal es consist of sol.id 304 stainless s teel shi.cids ar.d center-wi re with powdered alumina insulation. The outer shcath of the cable is covered with fiberglass sleeving. ~ MECHAfilCAL llousing 0.0 ficmi nal, (a t insu!ators).......................... .5.62' inches Hnusing Length, Nominal 162 inches Sensitive Length, flominal - each section 70 inches Cable Leng t h, Nominal: WL23636 9.5. feet WL23636A c B 10.0 feet Triaxici Cable Connector: ,, ~ WL23636A r. B Amphenol Type 53175-1003 WL23636' Gremar Type 19387 -Jack tiet Veight 120 pounds Shipping Weight Approx. 350 pounds , 11ATERIAI. Hou s i ng*%..... 1100 Al Housi ng insulation Alumina Chamber Case Electrodes ~- 1100 Al 1100 Al Chamber l osula tion Alumina Cajale Conduc tors .........t... 304 Stai.nless Steel Cab lc Insulation Alumina. -Q NEbTRON SENSITIVE ItATERIAL Content 10 Boron (B Thic'kness 2) .0.8 r'q/cm L Gas Fi11 Nitrogen litPED Ai!C E - bh-Hinimum Resistance'(including cabid (Note 1 6 4) toinnerShield(lonChambe-Case),,,,,,,,,,,,,,,,~(T fj H.V. 10 I Ohms (.Each Section) Signal to Inner Shield.{lon Chamber Case). 1012 Onms Inner Shield ~to Outer Shield (for. Chamber Case to Housing. 10 0 0hms [ Approx. Capacitance (flote 2) -- - g e. t H.V. to inner Shield (lon Chamber Casc) 3710 pf,_ ] WESTH!Gl!OUSL ELECl HIC Coln' ORATION. ELECl HONIC TUDE IMVISION, ELt.mM, NEV/Mifd , ~., _.c n77 _3
I .u nc. 16 1971 s PACE 2 M -- (Upper"Sec t ion) Si gnal to I nner Shi eld (len Chamber Case) 1600 pf ' (Lower Section) Signal to Onner Shicid'(lon Chamber Case)......... 2050 pf IMXll'Ul1 RATil!GS Voltage between c!cctrodes 1000 Vol t s 0.C. Temperature at Chamber (f!ote 3) "........................./..... 250 F Temperature at Cable (flote-3) 200 F Temperature at C.onnectors ( fl o t e 4 ).............................. 2'00 P External Pressure (Note 5) ..............,...............;j.... Ifjopsi Radiation at Chamber 5 x 10 nv and 10 R/HR 6 Ra d i.f t i on, a t Connector 10 nv and 20 R/ER ~ OPERATit!G PARAltETERS Operatirig Voltage (?!ote 6) 50 to 1000 Vol t s 0.C. Saturation Characteris tics..'................................. See Attached Approximate Thermal fleu tron Schsi t ivi ty (Ea. Section): 3.75 X 10-I3 Amperes /nv-VL-23636 WL-23636A 3.75.x l'.-13 Ampercs/nv 0 VL-23636B 1.62 x 10-13 Ampercs/nv Approximate'Canma Sensitivity (Each Section)....... l.;14 X.10-10 Amperes /R/HR NOTES: l'. Resistance is taken at room temperature. High'er temperatures will' reduce ~ the resistance. 2. Capacitqnce is measnred between the center wi re and inner shield with the cent or pins of the remaining connectors grounded -to the. inner shield. 3. RAPIO C!lANGES IN TEltPERATURE liAY DAliASC THE ASSEllBLY. ~ 4 The. connector insulation must be cl ean and dry to avoi d' icw resi stance. prob 1 cms. Connectors may be heated to drive of f moisture but excessive heat may damage insulation. ~ 5. The pressurizing atmosphere must be non-ccrrosive. 6 The operating vol tage varies wi th current level. A plot of voltage versus current should be made to determine saturation point. '226 (#b no ~
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V.'ESTINGilOl[SE l~l.ECTRIC CCHPGim ^11CN, ELliCTI<ONIC I UBE OlVISION, ELMIRA, NEW YOHK
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~?$f '-~ ~ TYPICAL SATUR ATION CHARACTERISTICS i 'T IO-I ) 4- ,s_._ _ 4 ' I'/ D s 10-2 /e m a u oa. E <t .E E E i mao 310-3 ~' ..o. m .y m x - - - - - 10-4 0 300 GOO 900 1200 1500 Applied Voltage in Voit s d.c. CE-A2683 FIGURE 3 2.2 b tp
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-{ s< 3 ;- ". t. UliF Coaxial Connector ,/. r E, Nylon insulator Block r- / /t J u / 1 t ~ C e /, HH Cu* o r HN Connector Shietoe hx o ' C0AX SHIELDED ADAPTGR BOX gs Ncs Figure 5 ~ N g. w I y .v r, ee.
) 1's.li 1 _/' 1 j ' 'u l ' . j ,k .fI Sh;elded Dox l Coaxial Connector i e i nner Conductor i I l Triaxial 1 j Cor.nector i and I i. 2 I Cable (D) s \\ g or ~ ~ (E) Triaxial Connector a Coaxial Connector inner Shield s. TF.!AX TO C0AX SHIELDED ADAPTER BOX rv N Figurey .. a 4 O 8, E
fi; Q J --- % ~, Detector Mineral Filled Cable C ^\\ ) h 1 Detector WelI . ~ ~ = ColLil1G OF CABLE IN DETECTOR VELL 226 M'F 1 % Figure 6 . i.}}