ML20010C454

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Forwards Info Re post-accident Effluent Particulate,Iodine & Noble Gas Monitors Used for Monitoring Reactor Bldg Purge Duct & Auxiliary Bldg Vent Exhaust Duct,Per NUREG-0737,Item II.F.1
ML20010C454
Person / Time
Site: Crystal River 
Issue date: 08/17/1981
From: Baynard P
FLORIDA POWER CORP.
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.F.1, TASK-TM 3-081-16, 3-81-16, NUDOCS 8108200097
Download: ML20010C454 (12)
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S r?S' C O R F O M 4 7 60 8e Ausst 17,1981 File: 3-0-2ti

.#3-091-16 Mr. Darrell G. Eisenhut Director Division of Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Comission Washington, D.C.

20555

Subject:

Crystal River Unit 3 Docket No. 5F.X)2 Cperating License No. DPR-72 NUREG-(7737, Item II.F.1, Additional Accident Monitoring Instrumentation

Dear Mr. Eisenhut:

By letter - dated July 3,1981, Florida Power Corporatiot. comitted to submit documentation describing the. noble ps cffluent monitors and the iodine /

particulate gaseous effluent monitors by August 17, 1981.

The attached report describes proposed equipnent and system configuration for monitoring the Reactor Br.ilding purge duct and the Auxiliary Building vent exhaust duct.

The above monitors and the Main Steam line monitors (imple-mented under NUREG-0578, Item 2.1.8.b short-term) provide the required monitoring of all potential accident release paths.

The attached five (5) copies of " Post-Accident Effluent Paiticulate, Iodine, and Noble Gas Monitors" are herein submitted for your review.

Very truly yours, ejnarcA-p.fr /, e 3

f[ML[hh Dr. P.

. Baynard

[oV4 danaer Nuclear Support Services g

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PDR Gene'ral Office 3201 Thirty iourtn street scum. n.O Box 14042, St Petersburg. Florca 337S3 813-666-5151

a PWT--ACCIDINT 2nuJ1NT PARTICUIATE, IODINE, AND NOBLE GAS MONITOIE August 17, 1981

9 INTRODUCTIm In order to satisfy the requirements of NURm-0578, NURE-0737, and Regulatory Guide 1 97 the existing gEiseous effluent monitors, RM-A1 (containment purge exhaust) and RM-A2 (combined auxiliary building and.

fuel handling building exhaust), will be upgraded to provide continuous-radioactive measurement and recording of the noble ges, and continuous sampling for redioactive iodine and particulate concentrations likely to be present under post-accident conditions.

Power supplies for existing equipment are from vital sources as will be the case for all new instruments.

-In addition, the post-accident sampling system for the containment atmo-sphere sampling and analysis has been confi6ured to also provide the flexi-bility of monitoring EM-A1 and EM-A2 sample points. This system will per-4 mit the on-line quantitative measurement of the radionuclide content of the abcVe plant release points.

II. UPGRADED CGTATJMMT AND AUXILIARY BUILDING NOBLE GAS RADI0 IODINE AND PARTIGUMTdT@1 TORS The existing RMS equipment parmits the measurement of noble gas fission products in the effluent streams from the containment building vent (RM-1 A1) and the combined auxiliary and fuel handling building vent (BM-A2).

The units also collect and monitor particulate and iodine activities.

The existing equipment provides ceagrement cpbi3ity for noble gas fission in the range of toy 0-A.C /cm (ss Kr-8R), parti-products in the range g 10 JO10 go 10 gC I-131).

To comply with (as Cs-137) and iodine culate ACi/cm as in the range of 10-to Regulatory Guide 197 and NUREG-(T/37 post-aqcident rgquirements, the upper noble gas limits must be, increased,i;o IWJA.Ci/Cm for the containment vent monitor and to 10 w_ Ci/cm> for the auxiliary / fuel handling buildind monitor.

Th'.s will be accomplished by inetalling two additional wide range, halngen-q,lenched GM detectors on the sample lines from each exhaust vent.

These will be measuring the noble gas content after the sample line emerges from the existing monitoring units (ie. RM-A1 end RM-A2).

The configuration is shown in the attached figure.

The mid-range detector in measuring the noble gas content of the flowing gas stream in a 3 liter chamber with " reentrant" geometry, i.e.

similar to a Marinelli beaker configuration.

The high-range detector is viewing the shielded sample line through a collirator slot.

Both detectors are the Victoreen Model 857-10 and are connected to Victoreen Model SS6-10 readout modules which also power the detectors. Copies of the descriptive product litera-ture on these and other componenta are included in the A ndix.

To-geJher, the getector pair will cover tha range of from 10-Ci/cm3 tg tv #-Ci/cm (for the containment building air effluent) or to 10>

gCi/cm3 (for the auxiliary building air effluent).

In addition, tc comply with Regulatory Cuide 1 97 and NUREG-0737 post-accident require-ments, the upper particulate gpd ioding collection and analyzing capabi-lii;y must be increased to 10'- ACi/cm.

This will be accomplished by providing dedicated High Range Particulate Filters and silver zeolite iodine absorption units with the capability for onsite laboratory analy-sis.

These units d.1 their location will be designed such that plant personnel can remove, replace, and. transport the samples for the onsite

. analysis facilf ty with radiation exposures that are not in excess of GDC 19 Thus, this-lab analysis will provide the extended range required.

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r Where practical, the lower ran6e detector systems will be bypassed by the sample hir flow when the noble ps concentration exceeds their range so as to protect their integrity and keep them operable for use when the radio-active noble ps concentrations returns to normal.

AD exhaust air from thess sampling and monitoring systems will be re-turned to an appropriate exhaust duct so as to avoid contamination of the room air in the vicinity of the monitor units.

III. PCBT-ACCIDINT CAS PADI0 LOGICAL ANALYSE SYSTDE Basically, the CAS, post-accident analysis syntam consists of an on-line isotopic analysis subsystem which will identify and quantitatively masure the radionuclide in the containment building (AIE)' which utilizes a high atmosphere. This urdt is the APT Automated Isotopic Measurement SysteA resolution germanium detector to provice cama-ray epectroscopic. infor-mation by which the individual fission product concentrations within the sample can be determined.

This AIMS unit is automatically controlled by an internal computer system which also provides the computational ability needed for reduction of the g+m-ray spectral data to produce individual nuclide concentration values. A descriptive information sheet on the AIE unit is : ttached.

IV. SUFMARY DISCRIPTION OF PROCEDUPA FOR OPIRATION AND CALIBRATION A.

Noble Gas, Particulate, and. Iodine Monitoring Eb11owing modifications, the RM-A1 and RM-A2 units will still function as before in a "nornal" operation mode.

Should the normal range of measurement on the units be exceeded, the operator will isolate the low range measurement components to prevent excessive contamination and radiation damage to the subsystem.

The operator can then monitor the output from the mid-range unit and isolate this component should its rang also be surpassed by the gaseous fission product concentration encountered in the sampled effluent.

In addition, upon the above switch over to the high-range mode, sample collection of particulates.and iodines can also be initiated.

The duration of this collection period will be determined by the activity level of the sample.

Upon completion of sample collection othe semple units may be removed for onsite counting.

As the concentration returns towards normal levels, the more sensitive measurement subsystems may be reactiviated by appropriate valve alignment.

Existing, low range calibrations for RM-A1 and RM-A2 will be used with necessary calculated conversion from Kr-85 units to Xe-133 equivalents provided to the system operators.

The new4 added mid-range and high-range detectors will be supplied with factor calibrations against standardized Xe-133 concentrations where practical.

Otherwise, cal-culated sensitivity values will be used.

Clwek source response will be employed to routinely determine the relative detector response after installation. E

B.

AIMS Operation and Calibration The Automated Isotopic Measurement System ( AIM 3), ruanufactured by Applied Physics Technology, Inc., is aligned to the desired vent duct so as to measure the isotopic content of this sample. The AIMS is com-puter controlled ead automatically performs changes in sample flow paths and collimator position appropriate to changes in the concen-tration of radionuclides in the flowing sample.

In this way, over-loading of ths germanium detector system and the resulting data distortion are avoided.

The AIMS for the CAS sample provides temperature and pressure measure-ments and also provides the operator with timely information to indi-cate adequate sample flow rates and to pemit the necessary sample density correction calculations to be performed by the controlling computer.

The AIMS units are equipped with a mixed nuclide standvd calibration source containing BA-133, Cs-137, and Co-60 to provide garima r vs in the ange of 80 to 1332 kev.

The automated system will regularly perform a ca15hration against this standard.

The operating software for the AIMS contains stored abaolute counting efficiency data for each of the sample line/ moving collimator combinations which were experimentally measured at the factory.

Any changes in the built-in source counting efficiency curves will reflect changes in detector operating parameters that will affect the actual sample line counting efficiencies in a proportional fashion.

Therefore, changes in the counting eff'ciency as measured for the built-in standard will be used to correct or modify the stored efficiency coefficients for each actual sample geon3try. L

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Arca rr.onitoring spt(ms, te:! a'.d measure am-Ice.ing: inside and cutside the cortainment, fe'el bient garnma rad.ation. The VICTOREEN e55 A'ea stcragc and handling areas, reactor bcam ports, f/onitoring System achieves this in and around nu-hold-up tanks. cociant icoes, normal. trking ttas cic a' reactors, icelerators, irradiators and cther c.uch as labs, ha!!v.ays and cont'ai rooms.

facihties where radiation emitting rnateriafs are f/onitoring of residual radiation is required areund hand!ed or p'orer. sed. The Cede of federai Regula-

.ccelerator and ir radia tor f acilities. Additianal tions determines limits on rad ation esposure. Part areas needi,g area monitoring are beam s,'. itching of Title 10 of the CFR specifically states that per-

)vds, target and control areas.

sons having in their pouession f ssionab!e materials pJg,g,.hemistry labs sheuld hawe at Icast cne de-must have an operating crit cality a: arm sy3 tem. The tector in cach room of normal size end several stra-VICIGREEN E55 Area f/cmtor provides the neces-legically located in !ari,er open areas. The rcadout sary criticality atarm carabilities.

console. including thC alarm set controls, shcu'd be Ty;.ically, an area monitoring system will utilize a lo:ated in art as or. der supervisory control. In addi-dctector in any location wh(rc ;ersonnel might pas.

tion to is suing a..orn'ng of high radiation laels, the sibly bc caposed to an ad.erse amount of rad:ation.

a; arm trip can t'c u< ed to attuate in'erlock devices j

for n actor facilities, these areas ccnsist of tr.e fot.

or other safety ortions.

j SYSTEM DESCRIPTION The 855 Asa Monitoring System censists of two causes the meter to indicate where the alarm pohl etsential parts, the Readout flodule and the Detet.

i t, set. Adustment of the alarm set point is accom-tor. The detector converts the incident gamma plished by partially withdrawing the rneduie from radiation into an electrical 5.t,nal which is trans-its housing and turning a 15-turn potentiometer. In mitted to the readout module with a multi-conductor addition to the red high alarm light indication on cable. Two tant es are avai!able 0 01 mRih-to 10) the front paaet, outputs from a relay are located on mR!hr or 0.1 mR/hr to 10d rnR/hr. Two chscl. ng sys-the rear of the chassis to operate citerna! atarms tems are pro /ided to test the integrity of the system; one contmucus and one on-command.

Each channel (detector ' readout comb.i r.a t.ien) has.ts i

ce.n independent pre.e 5;,rply eliminating possibil-A continuously lit green hgnt on the f ront panel. d'-

ty of losing many channels of instrumentation with in cates the system is ON and wi!! co out upon signal the f ailure of one pczer supply, or roe.er failu c. The On Ccmmand ctecking system n.. t s a e,.~ n.' e.c. e a r.! ( f r.J t, t ivit y that The canipact modular sM M st a t e de rig r. grmits r i c 15 into r : si O r

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ielay rack cnas s's only 31, inches high. The rc cd Thk causes an ups c alc readiag verifying system v.eather proof detec'.ar comes eouipped with a mount-integrity.

ing bracket for easy instaliation.

In add tion to tSc faitraft aDum 14ht, a red high Certifmd test data has sho.sn that 855 A"a f/4t:r-rad.atior a!a m i Ct is ir.WN on the front panel.

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..mic This is a non-:c.tactmg i&'0!c P! arm. Rotating Icad of 1 G in the horizontal and vertira! die: tion the front r,anel k nob 10 tht "A! arm Point" pcsition over f requency range of 1 - 30 Hz.

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f MGO tW OF GPEHA t lO N 5'lCICHEf; 855 Area Monitoring Sptems consist A built.in anti saturation circuit p e.ents the system essentiahy of a halogen quenched G.f/. tube v.hese readings from falhng off full scale during oser-rarge pu!ses drrve a rnuftiple pump ratemo'er ciicuit. The c ondificns.

output from the pump circuit,is a true leg d.c. signal fbtural background and check source contribution directly related to the radiat on miensity.

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readout module.

ACCESSORIES The 8581 Remote Alarm is a visual arid audib!e prevides a regged, attractive enciesure in which to house the readout rnodult when single char.nels are alarm which can be mounted adjacent to the de.

used. The enciesure can be used as a bench top lector or any other convenient location. The E58-2 umt or shelf mounted. The 8081 chassis provides or 858-3 Remote Atarm/ Meter is basically the >_ame a cen.eruent mcans for mstalling three rcadout mod-as thc 8581 Remote Alarm but also provides a 3D utes in a standard in inch relay rack. The 858 4 inch v.ide meter scale, five decade visual display of blank plug-in panel is used when less thar. three the radiation level. The 848 3 Readout Enclosure channels of readout are required.

MODEL 858-5 FIELD cal.lBRATION KIT The 858 5 field Calibration Kit provides a quick w 3.

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State Rcading f pprenimately 30 mR/hr

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Indisidual Calibration supplied with Each Calibrator i

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Specifications...

b'rtriir.d Source Actnrity: 0.1 trg Rad.um in a Platinum.irridium N'.W",.d n

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  • Di:,re skoas Di" de re t" = 2'e h'sh.(12.1 :.rn.E.04 tm).

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1 tJet W eght. 7;- th (2* Vg.)

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rrsens: L.rer ta

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e p: :.;r,;rg of dete: tor.

An A E C 1ce nse os nor re qu? rec' Hcaever. rur:1. sers 5,ng,g cyu.me; g ga 7.*c ~:or in ayeeneent stares r;3y 2 e suliect to licensir,g or reg.

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G P ECli4 C A flO N S.

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DE11CTORS 8571 or 857 2 Time Constant: 60. E. 6 sec se 01,1, I mR/hr

. Type: G tW' tube.

Dimensiens: 5%* wide. 3%" h gh.11%* deer sespectively.

F ell: A gon, halqen cuer ched e

Range: Vodel 8571 Detector: 0 01 te 10' mR:hr.

(14.4 cm,8 90 cm. 28 3 cm).

f/odel 857 2 Detector; 0.1 to 10+ mRIhr.

Weight: Approsimately 3 pounds (1.35 Vg)

Eriergy Dependence: 215% from 100 Kev to 1.5 RE MOTE At_ ARM 8581 M-

Visual Alarm: Red light,1" square, %* thick Radiation CPected: Gamma.

(2.54 cm,1.27 cm).

. Temperature Limits: -20*F to 140*F.

' Audible Atarm: Loud buzzer activates with afarm

.. (-29 C to 60'C).

light.

Pressure Limits: 3D psig.

Logic: Same as the "High Alarm" cn the Readout Humidity Limits: 0 te 100%.

f/oduie.

Connector: AN310216.lP.

Temperature Limits: --20*F to 140'F Detector Element Life: Enceeds 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> at full-(-27 C to 60-C).

scale or cier.

Humidity Limits: 0 to 95*. (aeatherproof).

Electronic Esposure Life: Apprcismately 10' Rads.

f.'ounting: Heavy duty industrial juncton ban with Dimensions: 3" c;ameter. 7%* hign f:anges for wau rnaunting.

(7 E3 crn,18.1 cm).

Dimensions: 7" t rh. 7" wide 4" deep L Weight. 4p*onimately 1 pound (3 45 Kg).

. (17.8 cm,17.E cm.10 2 cm).

f.'o unt mg: Wall b aciiet.

Weight: 4h pounds (2.15 Kg).

Remote Capability: Up to 1000 feet..

REMott ALARMjMETER 85B.2 or 858 3

+

RL ADOUT MODULES B561 or 856-2 Rante: Model 858 2: 0 01 to 102 mRihr.

I/eter Scalc Size: 3b" (8.90 cm) taut band.

Model 855 32 0.1 to 108 mRlhr.

Alarms:

Visual Alarm: Same as Remote A! arm above.

Fail Atarrn; A green pastbutton light is provided Audible Alarm: Same as Remote Alarm above.

on the front panel. This light is ON durmg om eration and goes out if the signal or power fails.

logic: Same as Remete Alarm above.

This circuit automatically resets when a rnalfunc.

Temperature L.imits: Same as Remote Atarm above.

tion es corrected. Lepressmg this pushtwtton Humidity Limits: Same as Remote Afarm above.

will activate the check source in the t'etector caus;ng an upscale readmg preur g the charnel f.'ounting: Same as RemSte Afa m above.

integrity ' Tr4 pusht'ulton is spring Icaded and Dimensions: Sa-ne as Rmete Alarm above.

wit! return the channel to norrnal operation w5en Weight: 5 pounds (2.26 Kgt released-foeter: 3%* wide with 5 a+cade d setay (8 90 cm).

High A: arm; A reo pushbutton hght is prouoed Remote A!ar'n'f/eter tracks reaoout module on tne tront panet. Thrs light win go Oft when meter within 12% of fuliscale.

the rad.aton esceeds the preset level. Depress-ing t' irs sp*ing IWied button will reset the SINGLE CH ANNEL a:;r.n wt.er th( rar' Marra has nbsicied btIca the g*

e n Iset. The dorm will not rest! wMe the 4phtation: Smrle Channef A n /e tm bad-r a: stor Ne' c Rne tM a:arrr set point.

put f/;.dute.

Tne NO Ai rtr leve tirp-point ts adfested by Construction: W-3D A'ound, wefje:: Steet case, with i ~

rmans of a 15. turn pcteritic;neter, located on chonel ruide for mod le m3*rtion.

the reinted circutt leasd-FAounting: Rubber pads for bench or shelf Contiols:

mount mg.

Rotary Function Switch; "OFr* oasition shuts oft Dime nsions: 4%" high. Ch* wide,12" deep all pcwer to tne cr.annel. " OPE R ATE" pesition puts chant,el mto ocema! cperation. In "At ARM (11.4 cm.16.5 cm. 30 4 cm).

POINT" pesition mete need. radecates where Weight. % pounds (2 60 Kg).

the a:arre pom' is set The alarm circuit is iso.

I lated to preverit the afarm frorr-actualmg and to R ACK CH ASSIS (8481) prever;t a recorder cc* outer from tracking the Appbcation: Multi. channel Aeta f/enitormg Read.

aterrn pomt wSen switch is held in tne " Alarm uut Modules.

s Fomf" pnsition This switch is spring loaded to Construction: Sheet steel metded te anfle steel return to the *0PLRM " position when reirased trackets, with p'astic ruides for insertion of Esternal Afarm Contacts; High and fail; 5 amp.

three readou! modules.

eles. !?O volts. SPDT.

f/ounting:

Dest ned to fit in standard 19 inch t

slecorder output: 0 to 10 mv1 Scans f4e decades retay rack.

6vaated fic,rt. c:-nputer outputt Darnensions: 34" h.gh,19" aide.114" deep cer ruter Output: 0 te 50 mv (;sstated).

(8 90 cm. 48 3 cm. 28.3 crr.).

i Connector: 1(rmmat strip for bookup of detector Wtight: 7h pouncs (3.50 kgt cable, recorder, computer, esternal alarrns and fo!bw rr-eleet, or' Lack of prmted cncuit t> cards.

Pt.ANK RE ADOUT MODULE PANF L (858-4)

Acressable from front with unit withdrawn from Apohcaleon: Fill in b:enh space (s) of the rack sack.

c ha* s es.

i Temterature t imits: 32*r to 120'F Construction: Aruminum fr me with blac6 finish.

WC tc 49'C)

Mounting: Sa Wy s' des ir.to the rack chatsis r

HierMdity Limitsi 0 95%

D emen6cns: 3'/:* herh. L%* wide input teaer Reauirement: 117;234 volts :- 15%.

18 90 cm,14.4 cm).

50 60 Hr.

W eig ht: 4: pound (0 23 Kg).

Power Supplied

  • 603 voits ra g.Jated. 4 22 votts umtfutaRc. + 10 vo:ts ert:. tate:. -6 P volts DE TE CTOR C ABLE (b4E.6) syuved Type. f/utti coneuctor; euter im u'ation Ausibary Pcaer If tr IP Wts d c batter) (stand.

wat er proof.

tyy). 330 m, e a..mam Outside Diameter: %" rum.nal fl.27 cm).

F4 tee Response: (Approi ) 2.5 sec for *ull state Temperature Limits: ~.40'F to 158'F cef 6cetion.

(--40*C to 70*CL-WCTOREEN lh'STRUMENT DIV. of VLN 10101 wooot Afeo Avtreut. Ct rvrLArJo, culo 44104 -

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