ML032760673

TVA Calculation 0-RE-90-125/126, Demonstrated Accuracy Calculation

ML032760673
Person / Time
Site:	Sequoyah
Issue date:	06/07/2000
From:	Eric Turner Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
References
-RFPFR, B87 000607 018, O-RE-90-125/126
Download: ML032760673 (43)

Text

atov oR IC.I NAL UK,. TWAN CALCULATION COVERSHEET ' _

Title DEMONSTRATED ACCURACY CALCULATION Plant SON Page 0-RE-90-125/126 Unit 0 Preparing Organization Key Nouns (For EDM)

NE-I&C I&C, INSTR, CALIBRATION, SETPOINT, ACCURACY Calculation Identifier Each time these calculations are Issued, preparer must ensure that the original (RO)

O-RE-90-125/126 RIMS/EDM accession number Is filled hI.

Rev (for EDM use) EDM Accession Number Applicable Design Document(s) RO B87 0o 0607 018 SQN-DC-V-9.0 and SQN-DC-V-13.9.6 RI UNID System(s) R2 90 R3 iRO f R R Quality Related? Yes No 0 0 DCN, EDC, Safety related? If yes, Yes No NA __mark Quality Related yes 0 0 Prepared o *_7_

Checked These calculations contain Yes No unverified assumption(s) 0 0

___________ _____________ that must be verified later?

Design These calculations contain Yes No Verified special requirements D s and/or limiting conditions?

Approved These calculations contain Yes No a design output D3 0

________ __________ attachment?

Approval Calculation Classification E Date SAR Yes 0 No 0 Yes D No D Yes 3 No E Yes 0 No 3 Microfiche generated Yes No Affected?

Revision Entire calc s Entire calc a Entire calc 0 Entire calc 3 Number applicability Selected pgs 0 Selected pgs E Selected pgs E I Statement of Problem:

Determine the accuracy of the subject Instrument loop(s) and demonstrate that the accuracy Isadequate for the Intended purpose. Primary elements are located hI a Harsh environment. Subject devices are not part of PAM.

Abstract Calculations were performed to determine the accuracy of the subject Instrument loops. The determined accuracies were compared to the required accuracies, setpoints, safety limits an/or operating limits and the accuracy for the loops listed below were demonstrated to be acceptable for their intended function.

0-R-90-125 & 0-R-90-126 1l Microfilm and return calculation to Calculation Library. Address: OPS-1 03 Microfilm and destroy.

0 Microfilm and return calculation to:

TVA 40532 [02-1 9991 Page I of I NEDP-2-1 102-19-1999]

TVAN CALCULATION RECORD OF REVISION Page 1 of I TVAN CALCULATION RECORD OF REVISION Title DEMONSTRATED ACCURACY CALCULATION O-RE-90-1251126 Revision DESCRIPTION OF REVISION Date m II Approved 0 Initial issue. The loops evaluated by this calculation were previously removed from the scope of calculation 0-RE-90-106A This calculation supports resolution of SQ97151IPER and defines an Ailowable Value for input to Proposed Tech Spec Change 98-03. 4A 6 Legibility Evaluated and Accepted for Issue: J. H. Rinne Date A/7/.260 This revision contains 176 pages.

NEDP-2-1 108-06-971 Page 2of 3 40532 (08-97J WA 40532108-97J TVA Page 2 of 3 NEDP-2-1 108DS97)i

TVAN CALCULATION DESIGN VERIFICATION (INDEPENDENT REVIEW) FORM Page 1 of I TVAN CALCULATION DESIGN VERIFICATION (INDEPENDENT REVIEW) FORM 0-RE-90-125/126 0 Calculation No. Revision Method of design verification (independent review) used:

1. Design Review 0

2. Alternate Calculation a

3. Qualification Test a Comments:

All comments between myself and the preparer have been resolved. This calculation revision is found to be in compliance with NEDP-2. The FSAR compliance review has been performed as denoted by incorporation of the appropriate form. Additionally, the methodology utilized in revision 0 of this calculation is commensurate with the guidelines provided in Branch Technical Instruction EEB-TI-28, R4.

Prepared: ;-p,I 4 ate:/u NEDP-2-2 [08-05-97]

TVA40533 (08-971 1VA40533 [08-97 Page 1 Page Of II I of NEDP-2-2 [08-05-97

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126. R0 DEMONSTRATED ACCURACY CALCULATION FSAR COMPLIANCE REVIEW This review has been performed to verify FSAR compliance. The following FSAR sections have been reviewed:

5.2.7.1 and 12.2.4 Tech Specs 3/4.3.3.1 and 3/4.4.6 Results of review:

The SAR is not impacted by issuance of this calculation.

Note: Tech Spec Table 3.3-6 specifies a setpoint value of

• 400 cpm for control room isolation. This setpoint is conservative with respect to the results of this calculation. Additionally, this calculation also defines an Allowable Value. The existing setpoint of* 400 cpm in Table 3.3-6 could be replaced with the Allowable Value via Tech Spec Change 98-03.

Prepared: it44 Date:

Checked: Ž;EAJ 7Y _ Date:/

/

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION T A B L E O F C O N T E N T S SHEET PURPOSE ..................................................... 2 ASSUMPTIONS/LIMITING CONDITIONS/REQUIREMENTS ................ 2 SOURCE OF DESIGN INPUT INFORMATION (REFERENCES) ............. 3 DESIGN INPUT DATA A) DEFINITIONS & ABBREVIATIONS ........................ 4- 6 B) LOOP COMPONENT LIST ................................ 7 C) LOOP FUNCTION, REQUIREMENTS, & LIMITS .............. 8 D) COMPONENT DATA ..................................... 9 - 11 E) COMPONENT DATA NOTES ............................... 12 - 19 DOCUMENTATION OF ASSUMPTIONS ................................ N/A COMPUTAT IONS /ANALYSES A) PROCESS UNCERTAINTY DISCUSSION/CALCULATION. 20 - 23 B) WATERLEG UNCERTAINTY DISCUSSION/CALCULATION. 24 C) ACCURACY DISCUSSION ................................ 25 D) ACCURACY CALCULATION INDEX & CALCULATIONS .......... 26 - 33 SUPPORTING GRAPHICS A) LOOP DIAGRAM ....................................... 34 - 35 B) INSTRUMENT SENSING DIAGRAM ......................... N/A

SUMMARY

OF RESULTS .......................................... 36 - 37 CONCLUSIONS ................................................. 38 REV 0 PREP LMB DATE 6/1/00 CHECK i4 / DATE & SHE00 SHEET 1 C/O 2 REV PREP DATE CHECK DATE I SHEET C/o REV PREP DATE CHECK DATE SHEET C/o

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION P U R P O S E The purpose of this calculation is a) to determine the accuracy of the instrumentation covered by this calculation, and b) to demonstrate that the instrumentation is sufficiently accurate to perform its intended function without safety or operational limits being exceeded.

A S S U M P T IO N S I This calculation contains no assumptions.

The following assumptions were used in the performance of this calculation. These assumptions require further analysis. This calculation may require revision if the assumptions below are shown to be invalid.

R E Q U I R E M E N T S

1. 1 A Digital Volt Meter shall be used for calibration of the output device.

1. 2 M & TE accuracy shall be better than or equal to one (1) times the accuracy of the device being calibrated.

1. 3 The calibration cycle shall not exceed 18 months plus an allowable 25%

extension (22.5 months).

S P E C I A L R E Q U I R E M E N T S NONE L I M I T I N G C O N D I T IO N S NONE REV 0 PREP LMB DATE 1/11/00 CHECK £t 7 DATE 3/3111b SHEET 2 C/O 3 REV PREP DATE CHECK DATE SHEET C/o REV PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION SOURCE OF DESIGN INPUT INFORMATION (REFERENCES)

REF# ATT# REFERENCE (RIMS#)

1 - Calculation SQNAPS3-100 (R12), "Demonstrated range for Sequoyah Nuclear Plant Radiation Monitors" 2 - Design Criteria SQN-DC-V-21.0 (R13), "Environmental Design" 3 - TVA Drawings: 1-45N1620-4 (R2), 1,2-47W605-1 (RIO),

1,2-47W600-103 (R3) 4 - Calculation SQN-OSG7-0033 (R13), "Radiation Monitoring System (90) 10CFR50.49 Category and Operating Times" 5 - General Atomic Manual, E-115-188 for RP-30.-

6 - General Atomic Manual, E-199-313 for RD-32.

7 1 Detectors: Historical Calibration Data 8 2-11 Monitoring Signal Conditioning Components: Historical Calibration data 9 12 Calculation SQNAPS3-053 R3 10 - Master Equipment List (MEL) 11 - Branch Technical Instruction EEB-TI-28, R5 12 13 Statistical Analysis 13 14 Letter from Noel Seefeldt Representative for General Atomics/Sorrento 4-16-90 (B26900511900) 14 15 Calibration Report Models RD-32-05 and RD-32-08 Offline Beta Detectors 15 16 Operation and Maintenance Manual for Radiation Analyzer Readout Module RP-30 16 - SQN TI-18, Radiation Monitoring 17 17 Letter to W. S. Raughley, TVA from Noel A. Seefeldt/Don Peat 3-16-90 (B26900330903) 18 - General Atomic Manual, E-199-313, Seismic Test Report 19 _ Design Criteria SQN-DC-V-9.0 (R13), "Post Accident Monitoring" REV 0 PREP LMB DATE 5/23/00 CHECK L1DATE 4/goJ SHEET 3 C/o 4 REV PREP DATE CHECK '_ DATE SHEET dC/O REV PREP DATE - CHECK DATE SHEET oC/

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION A) DEFINITIONS & ABBREVIATIONS Desired Value: The value of the process variable which is considered desirable for the optimum performance of the instrument loop.

As Found Value: The value of the process variable as read and recorded by the field technician when he went to the device to perform check/calibration of the device.

As Left Value: The value of the process variable read and recorded by the technician at the time when he has completed his check/calibration of the device.

As Found Deviation Percent: The percentage of deviation of the "as found value" and "the desired value".

As Left Deviation Percent: The percentage of deviation of the "as left value" and "the desired value".

As Left As Found Deviation Percent: The deviation in percent between the last calibration "as left deviation percent value" and the next calibration "as found deviation percent value".

Aa ACCIDENT ACCURACY-ACCURACY OF A DEVICE IN A HARSH ENVIRONMENT CAUSED BY AN ACCIDENT Aas COMBINED ACCIDENT AND SEISMIC ACCURACY Ab ACCEPTANCE BAND - THE RANGE OF VALUES AROUND THE CORRECT VALUE DETERMINED TO BE ACCEPTABLE WITHOUT RECALIBRATION AB AUXILIARY BOILER LINE BREAK AF AFW PUMP TURBINE STEAM SUPPLY LINE BREAK An NORMAL ACCURACY - ACCURACY OF A DEVICE LOCATED IN AN ENVIRONMENT NOT AFFECTED BY AN ACCIDENT OR PRIOR TO AN ACCIDENT Anf CALIBRATION ACCURACY (MEASURABLE INSTRUMENT ERRORS AT TIME OF CALIBRATION)

As POST SEISMIC ACCURACY AV ALLOWABLE VALUE=SAFETY LIMIT/REQUIRED ACCURACY MINUS NON-MEASUREABLES; USED FOR THE PURPOSE OF DETERMINING REPORTABILITY ONLY.

CFM CUBIC FEET PER MINUTE REV 0 PREP LMB DATE 1/12/00 CHECK 7 DATE s13//oO SHEET 4 C/O 5 REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION A) DEFINITIONS & ABBREVIATIONS CPM COUNTS PER MINUTE CV CVCS LETDOWN LINE BREAK De DRIFT ACCURACY Ebs ERROR DUE TO BI-STABLE SET POINT VOLTAGE INACCURACY Ebsc ERROR DUE TO BI-STABLE CALIBRATION INACCURACY Ect ERROR DUE TO CURRENT TRANSMISSION Eed ERROR DUE TO ENERGY DEPENDENCE INACCURACY Efa FIELD ALIGNMENT ERROR Efr ERROR DUE TO FLOW RATE INACCURACY Eip ERROR DUE TO IMPRECISION INACCURACY Encr NET COUNT RATE ERROR Epc PRIMARY CALIBRATION ERROR Epo ERROR DUE TO SAMPLE LINE PLATE OUT LOSSES Ese SEISMIC ERROR HELB HIGH ENERGY LINE BREAK IAD INTEGRATED ACCIDENT DOSE ICRe INPUT TEST INSTRUMENT READING INACCURACY ICTe INPUT TEST INSTRUMENT CALIBRATION INACCURACY INDRe INDICATOR READING ERROR IRe INACCURACY DUE TO CABLE LEAKAGE L LOSS OF COOLANT ACCIDENT M MARGIN - THE DIFFERENCE BETWEEN THE SAFETY LIMIT/OPERATING LIMIT AND THE NORMAL/ACCIDENT ACCURACY (Mn = NORAL MARGIN Ma = ACCIDENT MARGIN mR/Hr MILLIREM PER HOUR REV REV 0 PREP PREP LMB DATE DATE 1/12/00 CHECK CHECK

£.L DATE DATE i/op SHEET SHEET 5 C/O C/O 6

REV PREP DATE CHECK DATE SHEET C/o

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION A) DEFINITIONS & ABBREVIATiONS N/A NOT APPLICABLE NCR NET COUNT RATE OCRe OUTPUT TEST EQUIPMENT READING INACCURACY OCTe OUTPUT TEST INSTRUMENT CALIBRATION INACCURACY PRCSe PROCESS UNCERTAINTY PSEe INACCURACY DUE TO POWER SUPPLY VARIATIONS PV PROCESS VALUE (ACTUAL)

RADe INACCURACY TO DUE TO RADIATION EXPOSURE Re REPEATABILITY INACCURACY RH RHR LINE BREAK RNDe NORMAL RADIATION DOSE BETWEEN CALIBRATION RPT RESPONSE TIME Se INACCURACY FOLLOWING A SEISMIC EVENT SECu SPAN ERROR CORRECTION UNCERTAINTY SL SAFETY LIMIT SP SETPOINT SPEe ZERO ERROR DUE TO EFFECTS OF OPERATING PRESSURE TAe TEMPERATURE EFFECT AT ACCIDENT CONDITIONS TID -TOTAL 40 TEARS INTEGRATED DOSE TNe TEMPERATURE EFFECT IN THE MAXIMUM/NINIMUM ABNORMAL TEMPERATURE RANGES TPRe TEST POINT RESISTOR ERROR WLe WATERLEG UNCERTAINTY WLHP WATERLEG HIGH POINT WLLP WATERLEG LOW POINT REV 0 PREP LMB DATE 1/12/00 CHECK L DATE ./3ieke SHEET 6 C/O 7 REV PREP DATE CHECK DATE SHEET OC/O REV PREP DATE - CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A B) LOOP COMPONENT LIST LOOP ID# COMPONENT ID#

O-R-90-125 0-RE-90-125 O-RM-90-125 O-RI-90-125 O-R-90-126 0-RE-90-126 0-RM-90-126 0-RI-90-126 REV REV 0 PREP PREP LMB DATE DATE 1/12/00 CHECK CHECK CK r DATE DATE

& S3 HE0 SHEET I SHEET 7 C/O C/O 8

REV PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A C) LOOP FUNCTION MAIN CONTROL ROOM INTAKE MONITORS (O-R-90-125 & 126)

These loops are used to monitor gross radioactivity of the air in the normal intake ventilation duct to the MCR. These monitors are provided to satisfy the requirements of 10CFR50, Appendix A for providing radiation protection to permit occupancy of the MCR. Detection of a high radioactivity level in the intake air being introduced into the MCR from outside shall automatically cause the transfer from normal to emergency mode (reference 19).

C) LOOP REQUIREMENTS AND LIMITS RESPONSE TIME: The electronic field equipment (RE & RM) responds rapidly to Radioactivity level changes, therefore, in comparison to Operator interface the response time for this loop is negligible. This loop performs both an indicating function (RI) and a control function (transfer to emergency ventilation). Therefore, the response time of the entire radiation loop is not a concern.

SAFETY LIMIT (TRANSFER FROM NORMAL TO EMERGENCY MODE):

r.-82 X 10' CPM (REFERENCE 9) l7 INDICATED RANGE: 101 to 10 CPM.

SETPOINT (BISTABLE):

Radiation monitoring setpoints will vary over the fuel cycle of the plant, however the error values will be given as constant and will ot vary based on the setpoint. the setpoint for this loop is ontrolled by Chemistry but must be maintained

• 400 cpm for ompliance with the Tech Spec. This is conservative based on the results f this calculation which identifies that a setpoint of K1.94 x 104 cpm s adequate for compliance with the above safety limit.

However, this calculation defines an Allowable Value that could replace the setpoint of

• 400 cpm defined in Tech Spec table 3.3-6 via Tech Spec Change 98-03.

REV 0 PREP LMB DATE 5/23/00 CHECK hLL DATE 61/00 SHEET 8 C/O 9 REV PREP DATE CHECK DATE SHEET C/o REV PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION DESIGN INPUT DATA D) COMPONENT DATA VALID FOR DEVICES IDENTIFIED ON SHEET(S):8 COMPONENT: O-RE-90-125&126 CONTRACT#: 92759 REFERENCE#: 6 MANUFACTURER/MODEL: General Atomic RD-32 Detector/Pre-Amp REFERENCE#: 6 INPUT RANGE & UNITS:

• NOTE#:_* REFERENCE#: 1 OUTPUT RANGE & UNITS: 101 TO 107 CPM NOTE#: - REFERENCE#: 6 OVERRANGE LIMIT: N/A NOTE#: - REFERENCE#: -

CALIBRATED SPAN: 10' TO 107 CPM NOTE#: - REFERENCE#: 6 ROOM#/ PANEL#: Col NOTE#: - REFERENCE#: 2 ELEVATION/COORDINATE: 732/PC1 NOTE#: - REFERENCE#: 3 MIN/MAX ABNORMAL TEMP: 60°F / 104°F NOTE#: - REFERENCE#: 2 ACCIDENT TEMPERATURE: 104°F NOTE#: - REFERENCE#: 2 RADIATION TID (RAD): 3.5 X 102 NOTE#: - REFERENCE#: 2 RADIATION IAD (RAD): < 2.2 X 103 NOTE#: - REFERENCE#: 2 INSTRUMENT TAP INFORMATION REFERENCE #: N/A WLHP TAP ELEVATION: N/A WLHP CONDENSING POT ELEVATION: N/A WLLP TAP ELEVATION: N/A WLLP CONDENSING POT ELEVATION: N/A EVENT/CATEGORY/OPERATING TIME: Mild Environment NOTE#4 - REFERENCE#: 4 N/A / N/A / N/A

• Range in pCi/cc depends on the specific isotope being monitored (See Reference 1).

REV 10 PREP LMB DATE 5/23100 CHECKg DATE -/li/oo SHEET 9 C/O 10 REV PREP DATE CHECK DATE SHEET C/o REV PREP DATE CHECK DATE SHEET C/o

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A D) COMPONENT DATA VALID FOR DEVICES IDENTIFIED ON SHEET(S):10 0-RM-90-125&126 COMPONENT: O-RI-90-125&126 CONTRACT#: 92759 REFERENCE#: 5 MANUFACTURER/MODEL: General Atomic RP-30 REFERENCE#: 10 INPUT RANGE & UNITS: 101 to 107 CPM NOTE#: - REFERENCE#: 5 OUTPUT RANGE & UNITS: 10l to 107 CPM NOTE#: - REFERENCE#: 5 OVERRANGE LIMIT: N/A NOTE#: - REFERENCE#: -

CALIBRATED SPAN: 101 to 107 CPM NOTE#: - REFERENCE#: 5 ROOM#/ PANEL#: Mechanical Equip Rm C01 / 732' NOTE#: - REFERENCE#: 2 ELEVATION/COORDINATE: 732' / PC1 NOTE#: REFERENCE#: 3 MIN/MAX ABNORMAL TEMP: 60°F / 104°F NOTE#: - REFERENCE#: 2 ACCIDENT TEMPERATURE: 104°F NOTE#: - REFERENCE#: 2 RADIATION TID (RAD): 3.5 X 102 NOTE#: - REFERENCE#: 2 RADIATION IAD (RAD): < 2.2 X 103 NOTE#: - REFERENCE#: 2 INSTRUMENT TAP INFORMATION REFERENCE #: N/A NLHP TAP ELEVATION: N/A WLHP CONDENSING POT ELEVATION: N/A WLLP TAP ELEVATION: N/A WLLP CONDENSING POT ELEVATION: N/A EVENT/CATEGORY/OPERATING TIME: Mild Environment NOTE#:__- REFERENCE#: 4 N/A / N/A / N/A

__ _/_ /__

___/ /__

REV 0 PREP LMB DATE 5/23/00 CHECK DATE *31/0 SHEET 10 C/O 11 REV PREP DATE CHECK DATE SHEET _ _C/O REV PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONS TRATED ACCURACY CALCULATION DESIGN INPUT DATA D) COMPONENT DATA (CONTINwED)

COMPONEET: O-RE/RM-90-125&126 PARAMETER VALUE/UNITS NOTE# REFERENCE#

Eed Negligible 1,3 9,17 Encr Negligible 1 9,17 Eimp +/- 20.0% of reading 1,2 15,16 Ebs +/- 1.0% of reading 4 13 Ect Not Required 5 --

Epc +/- 20.0% of reading 1,6 14,17 Ese Not Required 7 18

+/- 0.1% of FS (bistable)

ICTe +/- 4.0% of reading (ratemeter) 8,9 8 ICRe +/- 4.0% of reading 8 8 (ratemeter &

OCTe +/- 0.1% of FS indicator) 9 --

OCRe Not Required 9 --

Ab +/- 3.0% of span 10 15,17 Se Not Required 7 18 RNDe Not Required 11 2 RADe Not Required 11 2 TNe Included in Re 12 15,17 TAe Not Required 12 15,17

+ 24.48% of reading PRCSe - 13.82% of reading 13 --

PRCSeBIAS + 16.03% of reading 13 __

+ 1.62% of span INDRe - 1.32% of span 14 --

IRe Not Required 15 2 TPRe Not Required 16 --

INDMe i 2.0% of span 17 17 Re i 3.0% of span 12 15,17 Ebd +/- 2.2% of span 18 8 Efac i 5.1% of reading 19 17 REV 0 PREP LMB DATE 5/24/00 CHECK j[A I DATE 51f3j o SHEET 11 C/O 12 REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE CHECK DATE SHEET C/O_

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/RM-90-125&126 NOTE 1 Reference 17 identifies typical uncertainties associated with this equipment. Each uncertainty term is addressed by this calculation.

The uncertainty terms are:

A) Calibration: (Epc) This term accounts for the uncertainty of the primary calibration of the prototype detector. A known gaseous, liquid or solid source which is NBS traceable is routed through a prototype detector sample chamber or mock-up of the process stream to be monitor is used to calibrate the prototype detector assembly. The error associated with the output measurement of the prototype detector under calibration combine to yield primary calibration error.

This error cannot be seen during plant calibration.

B) Factory Alignment Error: (Efac) This term accounts for the uncertainty associated with obtaining acceptable reference readings with the factory calibration source.

This uncertainty is the difference between the prototype detector and the detector supplied to TVA using the factory calibration source. Mounting variation of the source is a contributor to this uncertainty. This uncertainty also accounts for the additional error in duplicating the same discriminator and gain (high voltage) levels used during the primary calibration with the prototype detector. This error cannot be seen during plant calibration.

C) Field Alignment: (Efa) After completion of factory test, monitors are delivered for installation at the site. The shipping, storage and installation process along with differences between the factory and site power, cable runs, noise, noise and general environment causes drifts in monitor response between the factory and the site. These monitors have adjustable discriminators and power supplies, and can be successfully realigned at the sites. The uncertainty associated with calibration or realignment of the monitor in the field is accomplished by calibrating to the plant calibration source. This uncertainty of calibration is accounted for via the M&TE uncertainties included in this calculation, i.e., ICTe, ICRe, OCTe, OCRe, and Ab. Thus field alignment error is not required to be included as a separate term.

D) Energy Dependence: (Eed) The difference in response of the detector to varying energy. The detector has a different sensitivity for each isotope it observes, the spread of these sensitivities is the error due to energy dependence. Normally the expected isotopes will be predominantly Xe-133. Plant procedures use the specific calibration factor analyzed by Engineering. Therefore, the energy dependence is accounted for and need not be considered as an uncertainty in this calculation.

REV 0 PREP LMB DATE 1/12/00 CHECK iZ DATE 4 /3/ SHEET 12 C/o 13 REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE CHECK DATE SHEET C/o

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/RM-90-125&126

1. NOTE 1 (Continued)

E) Net Count Rate: (Encr) The Net Count Rate error is also referred to as Detector Environment error. Sorrento Electronics addresses detector environment as four types of uncertainties; Energy Dependence (discussed in D above), Temperature Effect, Response Time (Dead Time), and Sample Flow errors. Per Sorrento, changes in temperature can affect photomultiplier tubes, however on their RD-52, RD-53, AND RD-56 detectors no change in response was seen for changes in temperature from 40 to 130'F. Photomultiplier tubes are effectively linear for count rates from 10 cpm to 106 cpm. Above 106 cpm, PM tubes are affected by dead time with up to 30% foldover at count rates above 107 cpm. At a true count rate of 107 cpm, the actual reading would be about 7 X 106 cpm. The sample process error is accounted for separately inside this calculation under PRCSe.

The count rate of concern is much smaller than 106 cpm, therefore, the Net Count Rate error is accounted for and need not be considered as an uncertainty in this calculation.

F) Electronics: (An, An of the rate meter) The uncertainty in measuring and processing the signals generated by the detector.

2 Statistical uncertainty associated with counting the nuclear events will be greatest for the lowest countrate assuming equal time for counting (same count rate). Imprecision is determined by calculating the standard deviation:

a = N R/T where R = countrate in cpm T = 2RC (RC = time constant of readout module)

(RC varies with countrate)

The maximum setpoint for these monitors defined by this calculation is 1.94 x 104 CPM. The time constants used in the calculation are given in reference 15.

1.94 xIo4 cr i2(0.00717) a = 1163.12 2a = 2326.25 SP +/- 2a = 1.94 x 10 4 CPM +/- 2326.25 CPM Therefore %Error = +/- ( +/- 2326.25 / 1.94 x 104 } X 100

= i 11.99% at setpoint at the 95% confidence level REV 0 PREP LMB DATE 1/12/00 CHECK .$XL DATE 6/L/Lo SHEET 13 C/O 14 REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE CHECK DATE SHEET C/o_

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: 0-RE/RM-90-125&126 2 NOTE 2 (Continued)

Sigma 2 Sigma Setpoint RC (cpm) (cpm)  % Error 100 0.434 10.73 21.47 21.47 200 0.434 15.18 30.36 15.18 400 0.434 21.47 42.93 10.73 600 0.434 26.29 52.58 8.76 800 0.434 30.36 60.72 7.59 1200 0.0589 100.93 201.86 16.82 1600 0.0589 116.54 233.09 14.57 2200 0.0589 136.66 273.32 12.42 2800 0.0589 154.17 308.34 11.01 3400 0.0589 169.89 339.78 9.99 4200 0.0589 188.82 377.64 8.99 4900 0.0589 203.95 407.90 8.32 5600 0.0589 218.03 436.07 7.79 6200 0.0589 229.42 458.83 7.40 7200 0.0589 247.23 494.45 6.87 7800 0.0589 257.32 514.64 6.60 8800 0.0589 273.32 546.64 6.21 9800 0.0589 288.43 576.86 5.89 10800 0.00717 867.84 1735.67 16.07 11800 0.00717 907.12 1814.25 15.37 12800 0.00717 944.78 1889.56 14.76 13800 0.00717 980.99 1961.98 14.22 14800 0.00717 1015.91 2031.82 13.73 15800 0.00717 1049.67 2099.35 13.29 16800 0.00717 1082.38 2164.76 12.89 17800 0.00717 1114.13 2228.26 12.52 18300 0.00717 1129.67 2259.34 12.35 18800 0.00717 1145.00 2289.99 12.18 19300 0.00717 1160.12 2320.25 12.02 19350 0.00717 1161.62 2323.25 12.01 Setpoint 19400 0.00717 1163.12 2326.25 11.99 19450 0.00717 1164.62 2329.25 11.98 19500 0.00717 1166.12 2332.24 11.96 19550 0.00717 1167.61 2335.23 11.94 20050 0.00717 1182.45 2364.90 11.80 20550 0.00717 1197.10 2394.20 11.65 21050 0.00717 1211.58 2423.16 11.51 REV 0 PREP LMB DATE 1/12/00 CHECK &A1l DATEiXL/Ln SHEET 14 C/O 15 REV PREP DATE - CHECK DATE 6 SHEET _ OC/o REV PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/ M-90-125&126 I NOTE 2 (Continued)

Based on the preceding tabular data, the Error varies with setpoints from 200 to 19,400 cpm with a maximum value of +/-16.82% at a setpoint of 1200 cpm. Therefore, the % Error of +/-16.82% for a maximum setpoint of 19,400 cpm would be acceptable for Eimp. However, for conservatism, a rounded up value of +/-20% of reading will be used for Eimp.

3 The detectors have a different sensitivity for each isotope they observe, the spread of these sensitivities is the error due to energy dependence. For these monitors, the isotope concentrations used for the analysis to set the safety limit which can be considered the worst-case analysis are given in reference 15. This mixture will determine the CPM output at the setpoint. Therefore, the energy dependence is accounted for and need not be considered as an uncertainty in this calculation..

4 Per reference 13, the trip circuit is highly stable and accurate with an absolute accuracy much better than 1% of reading. For conservatism, bistable error will be set equal to +/-1% of reading.

5 The signal from the noble gas channel detector is coupled to the respective readout module via coaxial cable. The signal from the detector is first amplified in a preamplifier which is a part of each detector assembly. The coaxial cable is terminated in its characteristic impedance at the input of the readout module. The attenuation of the signal in the cable is "compensated" as follows:

A) A calibration source is used which has a dominant P energy low compared to that of nuclides to be detected.

B) In the calibration procedure, using the source described in A. above, the discriminator levels in the readout module are adjusted to give a countrate within a specified band which agrees with the activity of the source.

C) The signal pulses from the expected nuclides in the expected spectra of nuclides will then be larger than those which were used to set the discriminator levels, and will be counted.

Therefore it is not necessary to consider errors due to current transmission.

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION DESIGN INPUT DATA E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/RM-90-125&126

1. NOTE 6 Primary calibration is a procedure in which an NBS traceable source is routed through a sample chamber and the response is noted. The error associated with this calibration is +/- 20% of reading, reference 14 & 17.

7 Per reference 18, GA Seismic report, a seismic event will have no effect on the system. Therefore, Ese and Se are not required.

8 The calibration of the readout module uses a pulse generator, counter and timer. Instrument maintenance records (reference 8) have shown that a 4% variance in the desired pulse rate is achievable. A 45 variance in pulse rate can be equated to a 4% variance in reading Therefore, ICTe and ICRe = +/- 4% of reading.

9 As a requirement of this calculation, a digital voltmeter shall be used to read the output of the calibrated device. Therefore, OCRe is not required. Instrument maintenance has used a Keithley 197 DVM which has a stated accuracy of 0.018% input + 0.00024 V over a range of 0-20 V dc.

It is reasonable that any new DVMs will have an accuracy at least equal to the current DVMs. Therefore to be conservative an error of +/-0.1%

full scale will be used for OCTe for the ratemeter and indicator, and ICTe for the bistable.

10 Per reference 15 and 17, the ratemeter reference accuracy is +/-3% of equivalent linear full scale. All of the ratemeter errors are encompassed by this 3% error (Reference 15). This includes calibration inaccuracies, temperature effect, environmental effects and inherent equipment inaccuracies. Reference 15 states that temperature effect is

+/-0.1% of equivalent linear full scale / 0 C. The ratemeter is located in the Control Building, where the maximum temperature excursion is 16*C to 40*C (reference 2). This would yield a temperature effect of:

Temp. Effect = +/-(40 - 16C) x 0.1% x 10V

= +/-0.24 V Excluding this temperature effect would result in an inaccuracy of (0.3V - 0.24V = 0.06V). This 0.06V would still include other inaccuracies in addition to the reference accuracy. Per TI-28 (Reference 11), the acceptance band (Ab) should be at least equal to the reference accuracy. If the entire 0.06V were attributed to reference accuracy, Ab would equal 0.6% of equivalent full scale. However, to add more conservatism and minimize impact to existing plant procedures, Ab for the ratemeter and ratemeter/detector will be set equal to +/-3.0% of equivalent full scale, while the Ab for the bistable and the indicator will also be set equal to +/-3.0% of equivalent full scale.

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BRIUNCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONS TRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/RM-90-125&126 I NOTE 11 The detector, preamplifier and readout module are located in a mild environment where the maximum radiation is *2.2 X 103 RADs(reference 2).

12 Per reference 15 and 17, the vendor stated accuracy is +/- 3% of equivalent linear full scale. This +/- 3% includes calibration inaccuracies, temperature effect, environmental effects and inherent equipment accuracies.

13 Process uncertainty is applicable to the gas monitors. Process uncertainty is discussed in Computation/Analyses Section A.

14 The indicator reading error is 1/2 the largest division on the scale.

The indicator scale is logarithmic which means that the reading error will vary depending on which part of the decade the reading is taken.

To obtain the reading in percentage of span. The maximum reading error in the positive direction = Log(1.5) - Log(1.0) = 0.176 decades, while the maximum reading error in the negative direction = Log(2.0) -

Log(1.5) = 0.124 decades. These rate meters have a scale of 6 decades, therefore, % span error equals:

INDRe(+) = 0.0293 error

= 2.93% of span decades 0.124 error INDRe(-) - _

6 decades INDRe(-) = - 0.0206 error a - 2.06% of span decades 0.176 error INDRe(+) =

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/RM-90-125/126 NOTE 14 (continued)

However, as shown by this table the positive and negative reading errors will vary throughout the readings on the decade.

Reading on Decade  % Span Error 2.0 - 3.0 +1.62% -1.32%

5.0 - 6.0 +0.69% -0.63%

7.0 - 8.0 +0.50% -0.47%

8.0 - 9.0 +0.44% -0.41%

The readability between the 1 and 2 divisions is approximately 10 times better than between 9 and 10 due to the physical size of the scale markings. Therefore, the operator is less likely to make a 1/2 division reading error on the larger scale divisions. Using this reasoning the reading error for the first scale division (between 1.0 and 2.0) will be taken as 1/4 divisions. Therefore positive reading will = Log(1.25) -

Log(1.0) = 0.0969 decades, and the negative reading error = Log(1.25) -

Log(1.5) = -0.0792 decades. Therefore % span reading error equals:

decades 0.0969 error INDRe(+) =

6 decades INDRe(+) -0.0162 error

1.62% of span decades 0.0792 error INDRe(-)

6 decades INDRe(-) - - 0.0132 error

= - 1.32% of span It should be noted that these values for 1/4 division reading error between the 1 and 2 scale divisions are still more conservative than 1/2 division reading errors for the remainder of the decade scale division.

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION D E S I G N I N P U T D A T A E) COMPONENT DATA NOTES (CONTINUED)

COMPONENT: O-RE/M4-90-125&126 I NOTE 15 Per reference 2, the detector, preamplifier and readout module are in a mild environment, therefore insulation resistance effects will be negligible.

16 The test point resistor used for the calibration of this equipment is internal to the readout module and is accounted for in the accuracy of the module. Therefore, no additional error is needed for TPRe.

17 Per reference 17, the movement error of the indicator is +2%. Therefore INDMe = +2% of equivalent full scale. The front panel indicator is not used for calibration of the bistable or ICS point, a DVM is used for these devices, therefore INDMe is not required for these devices.

18 Using the calibration data from these devices, a statistical analysis shows the bistable and the drift associated with it was determined to be 2.2% of full scale (See reference 12 statistical analysis).

19 Per reference 17 the error associated with factory alignment of the detectors, as given by the vendor, is 5.1% of reading.

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS /ANALYSE S A) PROCESS UNCERTAINTY DISCUSSION/CALCULATION

_____NO PROCESS UNCERTAINTY EXISTS FOR THIS CALCULATION BECAUSE:

THE MEASURED PARAMETER IS THE PARAMETER OF CONCERN; THEREFORE, PROCESS VARIATIONS ARE ACCOUNTED FOR IN THE DETERMINATION OF SAFETY AND/OR OPERATIONAL LIMITS.

____OTHER: SEE DISCUSSION BELOW.

X PROCESS UNCERTAINTY DOES EXIST AND IS DETAILED IN THE FOLLOWING DISCUSSION/CALCULATION.

A.1 Radiation Monitor O-R-90-125 and 126 Density Correction A.1.1 Temperature A difference in temperature between the process and the detector infers a difference in density between the process and the detector. A change in density will bias the concentration per unit volume measurement.

Due to a high velocity transit through the sample line, approximately 30 fps based on 10 CFM through a 1" O.D. sample line, the measurement will be considered isothermal. At 30 fps it will only take a few seconds for the sample to reach the detector location. Any slight cooling will result in higher densities at the detector which will produce slightly higher count rates than at the process.

A.1.2 Pressure The radiation detector sample pumps are low volumetric flow pumps set to 10 SCFM based on the flow correction curves supplied in the technical manuals. A representative sample from the process line is set up using the flow pump, manual ball valves, the monitor flow indicator, pressure indicator, and M&TE flow instrumentation. Considering this setup procedure and that the gas detector is located on the suction side of the pump, the pressure at the detector location will be less than at the process.

A difference in pressure between the process and the detector infers a difference in density between the process and the detector. A difference in density will bias the concentration per unit volume measurement. If the density at the detector is lower than process density then the detector will undercount the activity, which is not conservative with respect to MCR intake concentration. Thus pressure difference must be accounted for between the process and the detector.

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS/ANALYSES A) PROCESS UNCERTAINTY DISCUSSION/CALCULATION A.1 Radiation Monitor Density Correction (Continued)

A.1.2 Pressure (Continued)

The optimum means with which to compensate for this phenomena is to quantify the difference in pressure between the detector and the process and to then establish the setpoint/indication allowing for the difference. Thus a pressure compensation factor must be calculated. The compensation factor is to be used in conjunction with the sensitivity curve supplied with the detectors to account for the difference between the measured pressure at the detector location and the process. The compensation factor can also be used to compensate indicated activity readings used in determining containment concentration.

Since the plant chemistry group will establish these setpoints, a correction factor formula based on observed detector pressure will be developed for inclusion in the Design Engineering Setpoint Scaling Document (the output document for this calculation). Uncertainty in the pressure measurement associated with the correction factor will be included in this calculation.

The vendor has developed an empirical formula to be used for pressure compensation. (Reference 19 "GA Manual E-115-647", Rev. 6). This equation will be used to calculate a correction factor to be used in calculating setpoints and to compensate for errors in indications used to calculate offsite releases.

The equation is Pp Correction Factor (CF) =

(Pp - PO)* (1+Pn*An)

Where: Pp = Process pressure In. Hg. Absolute Pn = Detector pressure In. Hg. Vac.

An = Self absorption factor An = .013 for Xe-133 An = .004 for Kr-85 Anxe = .013 will be used to calculate the correction factor. The dominant isotope is Xe-133 and yields a worst case error. Table A.2 gives the correction factors for detector pressures from 0 - 12 Inches of Hg. Vacuum.

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS/ANALYSES A) PROCESS UNCERTAINTY DISCUSSION/CALCULATION TABLE A.2 DETECTOR PRESSURE CORRECTION FACTOR PRESSURE CORRECTION FACTORS PROCESS PRESSURE DETECTOR PRESSURE CORRECTION FACTOR 29.92 In. Hg. Ab. 12.00 In. Hg. Vac. 1.4443 29.92 In. Hg. Ab. 11.50 In. Hg. Vac. 1.4131 29.92 In. Hg. Ab. 11.00 In. Hg. Vac. 1.3835 29.92 In. Hg. Ab. 10.50 In. Hg. Vac. 1.3556 29.92 In. Hg. Ab. 10.00 In. Hg. Vac. 1.3292 29.92 In. Hg. Ab. 9.50 In. Hg. Vac. 1.3042 29.92 In. Hg. Ab. 9.00 In. Hg. Vac. 1.2804 29.92 In. Hg. Ab. 8.50 In. Hg. Vac. 1.2578 29.92 In. Hg. Ab. 8.00 In. Hg. Vac. 1.2364 29.92 In. Hg. Ab. 7.50 In. Hg. Vac. 1.2160 29.92 In. Hg..b. 7.00 In. Hg. Vac. 1.1965 29.92 In. Hg. Ab. 6.50 In. Hg. Vac. 1.1780 29.92 In. Hg. Ab. 6.00 In. Hg. Vac. 1.1603 29.92 In. Hg. Ab. 5.50 In. Hg. Vac. 1.1435 29.92 In. Hg. Ab. 5.00 In. Hg. Vac. 1.1274 29.92 In. Hg. Ab. 4.50 In. Hg. Vac. 1.1120 29.92 In. Hg. Ab. 4.00 In. Hg. Vac. 1.0973 29.92 In. Hg. Ab. 3.50 In. Hg. Vac. 1.0832 29.92 In. Hg. Ab. 3.00 In. Hg. Vac. 1.097 29.92 In. Hg. Ab. 2.50 In. Hg. Vac. 1.08 29.92 In. Hg. Ab. 2.00 In. Hg. Vac. 1.0445 29.92 In. Hg. Ab. 1.50 In. Hg. Vac. 1.056 29.92 In. Hg. Ab. 1.00 In. Hg. Vac. 1.0213 29.92 In. Hg. Ab. 0.50 In. Hg. Vac. 1.0104 29.92 In. Hg. Ab. 0.00 In. Hg. Vac. 1.0000 REV 0 PREP LMB DATE 5/23/00 CHECK -1A 1I13/

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS/ANALYSES A)PROCESS UNCERTAINTY DISCUSSION/CALCULATION A.1 Radiation Monitor Density Correction (Continued)

A.1.2 Pressure (Continued)

Normal vacuum is between 5 and 7 In. Hg. A maximum detector baseline pressure of 6 In. Hg. Vacuum will be used to calculate a pressure correction factor to define PRCSe. Additionally, a bias error (PRCSeBIAs) will also be defined for this baseline pressure of 6 In. Hg. Vacuum. The correction factor does not need to be used for TI-30 "Radiological Gaseous Effluent" calculations because these monitors are not used to calculate offsite releases. Since a bias term is being considered for the maximum detector baseline pressure of 6 In. Hg. Vacuum, this correction factor does not need to be input to the ICS for compensating setpoints or ICS indications.

From Table A.2 CF 1.1603 for 6 In. of Hg. Vacuum Table A.2 can be used to determine a correction factor for the indicator and recorder based on actual detector pressure reading by the plant if a situation arises that requires specific data.

As stated above, the uncertainties in the correction factor included in this calculation will be based on 6 In. Hg. Vacuum, +/- 6 In. Hg. Vacuum. The +/- 6 In. Hg. Vacuum accounts for a span of 0 to 12 In. Hg. Vacuum range. The only way for the 0 In. Hg. Vacuum to occur would be for the vacuum pump to stop.

If the vacuum pump stops the flow would also stop, resulting in a malfunction alarm due to a flow rate of less than 4 scfm flow. The +6 In. Hg. Vacuum uncertainty in the correction factor will give a +12 In. Hg. Which will cause the vacuum switch to initiate a malfunction alarm. Therefore, a , +/- 6 In.

Hg. Vacuum uncertainties in the correction factor will be conservative. The uncertainties are calculated as follows:

+CF= (CF12 - CF6 )/CF6

• 100 ((1.4443 - 1.1603)/ 1.1603)

• 100

+CF +24.48% of reading

-CF= (CFo - CF6 )/CF6

• 100 = ((1.0000 - 1.1603)/ 1.1603)

• 100

-CF - -13.82% of reading Therefore, PRCSe = +24.48 / -13.82% of reading An additional bias term PRCSeBs will be considered based on utilizing the 6 In. Hg. Vacuum defined in the above discussion. From Table A.2, the error is 16.03%. The sign convention for this error term is positive. As previously stated, if the density (i.e., pressure) at the detector is lower than process density the detector will undercount the activity. Therefore, decreasing pressure (i.e.,increasing vacuum) will result in an indicating value that is lower than the true value. From reference 11 (EEB Branch Instruction TI-28),

Error = True Value - Indicated Value.

Therefore, PRCSeBj= +16.03% of reading REV 0 PREP LMB DATE 5/23/00 CHECK I DATE *131(00 SHEET 23 C/o 24 REV PREP DATE CHECK DATE SHEET C/o REV PREP DATE CHECK DATE SHEET C/o

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS/ANALYSE S B) WATERLEG UNCERTAINTY DISCUSSION/CALCULATION X APPLICABLE TO ALL LOOPS LISTED ON SHEET 8 APPLICABLE ONLY TO LOOPS:

X WATERLEG UNCERTAINTY IS NOT CONSIDERED FOR THE CALCULATION BECAUSE:

X NO WATERLEG EXISTS FOR THIS CALCULATION.

THE EFFECTS OF WATERLEG CHANGES ARE INSIGNIFICANT.

SEE DISCUSSION/CALCULATION BELOW.

OTHER. SEE DISCUSSION/CALCULATION BELOW.

A WATERLEG UNCERTAINTY DOES EXIST FOR THIS LOOP. SEE CALCULATION/DISCUSSION BELOW.

SEE SENSING LINE DIAGRAM ON SHEET OF THIS CALCULATION.

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r BRANCH/PROJECT IDENTIFIER O-RE-90-126/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS/ANALYSES C) ACCURACY DISCUSSION X The accuracy of this instrument for normal, post seismic and accident conditions will be determined by considering the parameters tabulated in the design input section of this calculation.

The accuracy calculation for seismic (As) is bounding for all seismic events.

X The square root of the sum of the squares method shall be used in this calculation for the calculating accuracy since the factors affecting accuracy are independent variables.

X Bi-directional errors and uni-directional errors will be combined in a manner such that the sum of the positive uni-directional errors will be added to the positive portion of the bi-directional error (obtained from the square root of the sum of the squares method), and the sum of the negative portion of the bi-directional error.

This method is conservative. Therefore, it will be used in this calculation.

Example: (+/-)10 = bi-directional error

+ 5 = first uni-directional error

- 2 = second uni-directional error Total Error = (+10 +5) to (-10 -2) = +15 to -12 Other:

For the purposes of this calculation, accuracy is defined as the range of actual process values that may exist for a given indicated or bistable trip value, e.g. an accuracy of +15 psig to -12 psig means that for a indicated or bistable trip value of 100 psig, the actual process pressure may be anywhere between 88 and 115 psig.

All system analysis based on or using accuracy values from this calculation should take into account the fact that operator action and/or automatic initiations may occur at a process value differing from the indicated or setpoint values by the amount of the calculated inaccuracies.

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 r DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS /ANALYSES D) ACCURACY CALCULATION INDEX 1.1.0READOUT MODULE ERROR (MODIFIERS) (0-R-90-125,-126) 1.1.1 Reference Accuracy Re 1.1.2 Output Calibration Test Error OCTe 1.1.3 Acceptance Band Ab 1.1.4 Input Calibration Test and Reading Errors ICTe/ICRe 1.1.5 Normal Measurable/Normal Accuracy Anfm/Anm 1.2.0READOUT MODULE - DETECTOR ERROR (0-R-90-125,-126) 1.2.1 Primary Calibration Accuracy Epc 1.2.2 Factory Alignment Error Efac 1.2.3 Imprecision Error Eimp 1.2.4 Process Uncertainty Error PRCSe 1.2.5 Normal Measurable Accuracy AnfMWRD 1.2.6 Normal Loop Accuracy Anthem 1.3.0BISTABLE ACCURACY (0-R-90-125,-126) 1.3.1 Bistable Error Ebs 1.3.2 Input Calibration Test Error ICTe 1.3.3 Acceptance Band Ab 1.3.4 Bistable Drift Ebd 1.3.5 Normal Measurable Accuracy AnfES 1.3.6 Normal Measurable Loop Accuracy LAnfBS 1.3.7 Normal Loop Accuracy . LAnES 1.3.8 Accident Loop Accuracy LAaBS 1.3.9 Allowable Value AV 1.3.10 Setpoint Determination Setpointx 1.4.0INDICATOR ACCURACY (0-R-90-125,-126) 1.4.1 Output Calibration Test Error OCTe 1.4.2 Acceptance Band Ab 1.4.3 Indicator Movement Error INDMe 1.4.4 Indicator Reading Error INDRe 1.4.5 Normal Measurable Accuracy AnfI 1.4.6 Normal Measurable Loop Accuracy LAnf1 1.4.7 Normal Loop Accuracy LAn 1 1.4.8 Accident Loop Accuracy LAaI REV 0 PREP LMB DATE 1/12/00 CHECK L4[27 DATE A 6114 SHEET 26 C/O 27 .

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BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION C O M P U T A T I O N S / A N A L Y S E S D) ACCURACY CALCULATIONS 1.1 READOUT MODULE ERROR (RM) 1.1.lReference Accuracy (Re)

Re = +/-3.0% of FS

= +/-0.03

• 10 V

= +/-0.3 V

= +/-0.3 V 1.1.2 Output Calibration Test Error (OCTe)

OCTe = +/-0.1% of FS

= +/-0.001

• 10 V

= +/-0.01 V 1.1.3Acceptance Band (Ab)

Ab = +/-3.0% of FS

= +/-0.03

• 10 V

= +/-0.3 V 1.1.4Input Calibration: Test Error (ICTe) & Reading Error (ICRe)

ICTe = ICRe = +/-4.0% of reading Per Reference 14, the transfer function to equate a reading error into an equivalent linear full scale error is:

% Reading Error = -[1 - 10+/-B(A

• 100 Where B = No. of decades/span A = Eq. linear full scale error in volts Therefore, by arranging terms the reading error can be expressed in volts by the following equation:

Volts(+) = (Log(l + (% Reading/100))] / (No. Decades/Span)

Volts(-) = [Log(1 - (% Reading/100))] / (No. Decades/Span)

Therefore, ICTe expressed in volts is calculated as follows:

+ICTe = [Log(1 + (4.0%/100))] / (6/10)

(Log(1.04)) / 0.6

+0.028 V

-ICTe = (Log(1 - (4.0%/100))] / (6/10)

-= (Log(0.96)) / 0.6

-0.029 V And;

+ICRe = +0.028 V

-ICRe = -0.029 V REV 0 PREP LMB DATE 1/12/00 CHECK DATE G1 1/0 SHEET 27 C/O 28 REV PREP DATE CHECK DATE SHEET _ _C/O REV PREP DATE CHECK DATE SHEET C/O _

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION C O M P U T A T I O N S / A N A L Y S E S D) ACCURACY CALCULATIONS 1.1.5Normal Measurable/Normal Accuracy Anfm/Anm

+/-AnfRM = +/-4 (Re2+OCTe 2+Ab2 +ICTe2 +ICRe2 )

+Anfm= +4(0.32+0.012+0.32+0.0282+0.0282)

= +0.426 V

- AnfR = -4(0.32+0. 012+0 .32+0 .0292+0.0292)

= -0.426 V From the equation above, these values may be converted to 4 of reading as follows:

+AnfRM= -[1 - 1s 0 -4 26> 0- 63 j

• 100

= -[1 - l0c- "6IJ

• 100

= +80.30% of reading

-AnfRH= -(1 10(-0426)(06))

• 100

-[1 - 1o(- 56)]

• 100

= -44.53% of reading Since all parameters are measurable, the Normal Accuracy is equal the normal measurable accuracy.

+/-Anm = +/-Anfm = +/-0.426 V 1.2 READOUT MODULE - DETECTOR ERROR (RM/RD) 1.2.lPrimary Calibration Accuracy (Epc)

+/-Epc = +/-20% of reading

+Epc = +0.132 V

-Epc = -0.162 V 1.2.2Factory Alignment Error (Efac)

+/-Efac= +/-5.1% of reading

+Efac= +0.036 V

-Efac= -0.038 V 1.2.3Imprecision Error (Eimp)

+/-Eimp= +/-20% of reading

+Eimp= +0.132 V

-Eimp= -0.162 V 1.2.4Process Uncertainty Error (PRCSe)

+/-PRCSe = +24.48% / -13.82% of reading

+PRCSe = +0.158 V

-PRCSe = -0.108 V PRCSeBIAS = +16.03% of reading PRCSeBIAs = +0.108 V REV 0 PREP LMB DATE 5/30/00 CHECK -DATE SHEET 28 C/O 29 REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE - CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION C O M P U T A T I O N S / A N A L Y S E S D) ACCURACY CALCULATIONS 1.2.5Normal Measurable Accuracy (AnfR/RD) 9t AnfRD = i/( Anf1R2+Eimp2 )

+AnfRRD = +4(0.426 2+0.1322)

- +0.446 V

-AnfRRD = -4(0.4262+0.1622)

- -0.456 V 1.2.6 Normal Loop Accuracy (AnR/RD) x= +/-i( AnfjRM+Epc 2 +Efac 2 'Eimp'+PRCSe2 ) + PRCSeBIAs

+AnRM/RD = +4)(0.426 +0.132 +0.0362+0.132 20.1582) ( 0.108

= +0.493 + 0.108 V

= +0.601

-AnRmRD= -4(0.4262+0.1624+0.0382+0.1622+0.1082)

= -0.497 V 1.3 BISTABLE ACCURACY (BS) 1.3.1Bistable Error (Ebs)

+/-Ebs +/-1.0% of reading

+Ebs = +0.007 V

-Ebs = -0.007 V 1.3.2 Input Calibration Test Error (ICTe)

+/-OCTe= +/-0.1% of FS

= +/-0.001

• 10 V

= +/-0.01 V 1.3.3Acceptance Band (Ab)

+/-Ab = +/-3.0% of FS

= +/-0.03

• 10 V

= +/-0.3 V 1.3.4Bistable Drift (Ebd)

+/-Ebd = +/-2.2% of FS

= +/-0.022

• 10 V

= +/-0.22 V REV 0 PREP LMB DATE 5/30/00 CHECK DATE SHEET 29 CAO 30 REV PREP DATE CHECK DAT SHEET _C/O REV PREP DATE - CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS / ANALYSES D) ACCURACY CALCULATIONS 1.3.5 Normal Measurable Accuracy (Anfss)

+/-Anf s= +/-4 (Ebs 2 +ICTe 2 +Ab2 +Ebd 2 )

+/-AnfBs= +/-I4(0.007 2+0. 012+0 .32+0 .222)

= +/-0.372 V 1.3.6 Normal Measurable Loop Accuracy (LAnfBs)

+/-LAnfBS = +/-q (AnfFM/RD2 +AnfBs 2 )

+LAnfBs= +4(0.4462+0.3722)

= +0.581 V (+123.2% of reading)

-LAnfBs= -4(0.45662+0 .3722)

= -0.588V (-55.6% of reading) 1.3.7Normal Loop Accuracy (LAnss)

+/-LAnas = +/- (AnfRs2 + AnR2RD) -+ PRCSeBm

+LAnBS= +4(0.3722+0.4932) + 0.108

= +0.726 V (+172.6% of reading)

-LAnBs= -4(0.3722+0.4972)

= -0.621V (-57.6% of reading) 1.3.8 Accident Loop Accuracy (LAaBs)

There are no additional inaccuracies during an accident.

Therefore, LAass = LAnBS

+LAaBs = +0.726 V (+172.6% of reading)

-LAaBS = -0.621 V (-57.6% of reading)

REV 0 PREP LMB DATE 1/12/00 CHECK DATE OL/DoSHEET 30 C/O 31 REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE - CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER 0I-RE-90-125/126 S DEMONSTRATED ACCURACY CALCULATION C O M P U T A T I O N S / A N A L Y S E S D) ACCURACY CALCULATIONS 1.3.9 Allowable Value (AV)

The safety limit for the bistable control function (transfer from normal to emergency mode) is 6.82 x 1O4 cpm. The loop bistable errors defined in sections 1.3.6 and 1.3.7 are:

+LAnfBs= +0.581 V (+123.2% of reading)

+LAnBs = +0.726 V (+172.6% of reading)

+AV is defined as follows:

+AV = Safety Limit - (Adbe - LAnf~s + Margin)

Where Adbe = +LAnBs, and Margin is defined as 0.182 V or 259% of

+LAn~s for conservatism.

Converting the Safety Limit to volts:

Log[Inpul(cpm)]- I Safety Limit(volts) #oglDecades Vof Decades Log[6.82 x104] - 1 Safety Limit(volts)

[=6F]

Safety Limit(volts) 6.390 volts Therefore;

)+AV(volts) = 6.390 - (Of726 - 0.581 + 0.182)

+AV(volts) = 6.063 V Converting to cpm;

[OUtput(wVtS)X#ofDecade +]

+AV(cpm) = 10L VOltagoSpan +

r6.063 X6+1]

+AV(cpm) = 10l [60636I

,+AV(cpm)1-4.34 x i04-(rounded down for conservatism)

REV REV 0 PREP PREP LMB DATE DATE 1/12/00 CHECK CHECK

-[DATE DATE 64Lib SHEET SHEET 31 C/O C/O 32.

REV PREP DATE CHECK DATE SHEET C/O_

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS / ANALYSES D) ACCURACY CALCULATIONS 1.3.10 Setpoint Determination A maximum setpoint value will be determined based on the value defined for +AV in the previous section:

tSetpointx(volts) = +AV - (+LAnfss)

Setpointx(volts) = 6.063 - 0.581 Setpointmz(volts) = 5.482 Converting to cpm; routput(voxts)X NofDeces 1 Setpointm(cpm) = 101 voktvSpan s.482 X6 1 Setpointm(cpm) = 10l 10 I

,Setpointmz(cpm) - 1.94 x 104 (rounded down for conservatismJ Note: Setpointw + LAn8s = 5.482 + 0.726 = 6.208 volts or 5.31 x 104 cpm and Setpointm -LAnB = 5.482 - 0.621 =

4.861 volts or 8.25 x 103 cpm.

1.4 INDICATOR ACCURACY (I) 1.4.10utput Calibration Test Error (OCTe)

+/-OCTe= +/-0.1% of FS

= +/-0.001

• 10 V

= +/-0.01 V 1.4.2Acceptance Band (Ab)

+/-Ab = +/-3.0% of FS

= +/-0.03

• 10 V

= +/-0.3 V 1.4.3 Indicator Movement Error (INDMe)

+/-INDMe = +/-2.0% of FS

= +/-0.02

• 10 V

= +/-0.2 V 1.4.4 Indicator Reading Error (INDRe)

+INDRe = +1.61% of span

= +0.0161

• 10 V

= +0.161 V

-INDRe = -1.32% of span

= -0.0132

• 10 V

= -0.132 V REV REV 0 PREP PREP LMB DATE DATE 1/12/00 CHECK

- CHECK

£ DATE

]7 DATE I/I/OO SHEET SHEET 32 C/O C/O 33 REV = PREP DATE CHECK DATE SHEET C/O

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION COMPUTATIONS / ANALYSES D) ACCURACY CALCULATIONS 1.4.5Normal Measurable Accuracy (Anfl)

+/-AnfI = +/-_(OCTe2+Ab2 INDMe2)

+/-Anf1 = +/-(0.012+0.32+0.22)

= +/-0.361 V 1.4.6Normal Measurable Loop Accuracy (LAnf1 )

+/-LAnf, = +/- 4 (AnfRM/rD 2 +Anf 2)

+LAnfI = +4(0.4462+0.3612)

= +0.574 V (+121.0% of reading)

-LAnf 1 = -4(o0.4562+0 .3612)

= -0.582 V (-55.2% of reading) 1.4.7Normal Loop Accuracy (LAn1 )

LAnj = +/-4(Anfi2+INDRe2+AnyRD 2) + PRCSeBIAs

+LAn, = +4(0.3612+0.1612+0.4932)+ 0.108

= +0.740 V (+178.0% of reading)

-LAnj = -4(0.3612+0.1322+0.4972)

= -0.628 V (-58.0% of reading) 1.4.8Accident Loop Accuracy (LAa 1 )

There are no additional inaccuracies during an accident.

Therefore, LAaI= LAnI

+LAa1 = +0.740 V (+178.0% of reading)

-LAaj = -0.628 V (-58.0% of reading)

Per reference 9, there is no required accuracy for the indicator.

REV 0 PREP LMB DATE 1/12/00 CHECK 611 DATE (//O SHEET 33 C/O 34 .

REV _ PREP DATE CHECK DTE~ SHEET C/O___

REV PREP REV~ ~ ~ DATE PREDAECEKDT CHECK DATE SHEET HE.

C/O

0 BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION A) LOOP DIAGRAM APPLICABLE ONLY TO LOOPS: O-R-90-125

Su-soaSTABLE HI RADIATION

}--~~---~90-125A ALARM RI CONTROL ROOM (21 > ISOLATION REV 0 PREP LMB DATE 1/13/00 CHECK i fLDATE t/I/OO SHEET 34 C/O 35 REV PREP DATE CHECK DATE SHEET C/o_

REV PREP DATE CHECK DATE SHEET C/o_

a BRANCH/PROJECT IDENTIFIER O-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATION A) LOOP DIAGRAM APPLICABLE ONLY TO LOOPS: O-R-90-126 90-126 STABLE-________,_ - 90- 26A HI RADIATION ALARM

/ 31A\ CONTROL ROOM ISOLATION REV 0 PREP LMB DATE 1/13/00 CHECK XL DATEJOL/ SHEET 35 C/O 36 REV PREP DATE CHECK DAT SHEET __C/

REV PREP DAE CHECK DATE SHEET CdO____

BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 DEMONSTRATED ACCURACY CALCULATAION

SUMMARY

OF RESULTS (BISTABLE)

APPLICABLE ONLY TO LOOPS: O-R-90--125 0-R-90-126 SAFETY LIMIT 6.82 x 104 cpm Margin 1.51 x 104 cpm PV = Accident 5.31 x 104 cpm PV = Seismic 5.31 x 104 cpm PV = Normal 5.31 x 104 cpm Max Setpoint 1.94 x 104 cpm PV = Normal 8.25 x 10' cpm PV = Seismic 8.25 x 103 cpm PV = Accident 8.25 x 103 cpm All values shown are in cpm (Refer to accuracy discussion, sheet s 29-32 for clarification of above)

+Av = 4.34 X 104 Cpm +Aas = N/A

-Av = N/A -Aas = N/A REV REV 0 PREP PREP LMB DATE DATE 1/13/00 CHECK fA CHECK I DATE DATE c/itoo SHEET SHEET 36 C/O C/O 37 .

REV PREP DATE CHECK DATE SHEET C/O

V BRANCH/PROJECT IDENTIFIER 0-RE-90-125/126 i! DEMONSTRATED ACCURACY CALCULATION

SUMMARY

OF RESULTS (INDICATION)

APPLICABLE ONLY TO LOOPS: O-R-90-125 SAFETY LIMIT N/A Margin N/A PV = Accident +178.0 PV = Seismic +178.0 PV = Normal +178.0 Indication PV = Normal -58.0 PV = Seismic -58.0 PV = Accident -58.0 All values shown are in  % of reading

• The maximum setpoint was determined with no margin from the upper range of the channel.

(Refer to accuracy discussion, sheet 32-33 for clarification of above)

+Av = N/A +Aas = N/A

-Av = N/A -Aas = N/A REV REV 0 PREP PREP LMB DATE DATE 1/13/00 CHECK CHECK KU I DATE DATE

(/'6°0 SHEET SHEET 37 C/O C/0o_

38 .

REV PREP DATE - CHECK DATE SHEET C/o

BRANCH/PROJECT IDENTIFIER O-RE-90-125/126_

DEMONSTRATED ACCURACY CALCULATION C O N C L U S I O N S X APPLICABLE TO ALL LOOPS LISTED ON SHEETS 8 APPLICABLE ONLY TO LOOPS: .

In conclusion, the demonstrated accuracy of +0.726 volts (+LAnBS) and -0.621 volts (-LAnBs)for bistable loops 0-R-90-125 and 126 will not result in challenging the upper safety limit of 6.82 x 104 cpm based on maintaining a bistable setpoint of

• 1.94 x 104 cpm. However, the current setpoint for this loop is controlled by Chemistry and must be maintained

• 400 cpm for compliance with the value listed in Tech Spec table 3.3-6.

This calculation defines an Allowable Value of 4.34 x 104 cpm that could replace the setpoint of

• 400 cpm defined in Tech Spec table 3.3-6 via Tech Spec Change 98-03. Loop Indication for 0-R-90-125 and 126 does not have a required accuracy and is therefore determined to be acceptable.

REV 0 PREP LMB DATE 1/13/00 CHECK -DATE SHEET 38 C/O REV PREP DATE CHECK DATE SHEET C/O REV PREP DATE CHECK DATE SHEET = C/O

TVAN CALCULATION COVERSHEET rttie Determination of Main Control Room Intake Monitor Plant SON Page 1 (0-RM-90-125,-126) Setpoint Unit 112 Preparing Organiation Key Nouns (For EDM)

Mechanical Design Radiation Monitor. MHA LOCA, FHA, Control Room Calculation Identifier Each time these calculations are issued, preparer must ensure that the original (RO)

RIMSIEDM accession number is filled in.

SQNAPS3-053 Rev (for EDM use) EDM Accession Number Applicable Design Document(s) RO 870727F0013 B45 870530 238 NA RI 930602G0002 B87 930601 002 UNIO System(s) R2 B87 960816 003 90 R3 RO RI R2 R3 Quality Related? Yes No DCN, EDC, NA NA NA NA Safety related? Ifyes, - Yes No NAmark Quality Related yes

• 0 Prepared Marc C. Berg Regis M.Nicoll Peter G. Sluder C.

Checked William M. Marc C. Berg Marc C. Berg These calculations contain Yes No Bennett fr'V1"1-4 ~~~~~~~~~~~.'

~unverified assumption(s) that

_Sennedttmustbehverecledlatero o Y Design Kenneth D. Marc C. Berg Marc C. Berg Thesecalculationscontain Yes No Verified Keith, Jr. Unmiting conditions? 0 K Approved Frank A. William A. Michael J. Lorek These calculations contain a Yes No Koontz, Jr. Eberly r design output attachment? i Approval 6/1193 8/13/96 A087 Calculation Classification Essential SAR Yes 0 No1* YesO No M YesQ No M YesO No * . Yes No Affected? oMicrofiche generated X Revision Entire cale 0 Entire calc

• Entire calc M Entire calc K Number R3: TVA-F-B000073 applicability Selected pgs 0 Selected pgs 0 Selected pgs 0 Statement of Problem:

Determine if the 400 cpm setpoint for the Main Control Room air intake monitor (0-RM-90-1 25, -126) is acceptable, exclusive of instrument and sampling Inaccuracies. Further, determine the safety limit for the subject monitors.

Abstract The purpose of this calculation is to determine if the current setpoint value of 400 cpm or less, exclusive of instrument and sampling inaccuracies, for the main control room air intake monitors is acceptable. Revision 3 is to update the calculation to the latest calibration factors as part of the corrective action of SQPER981301 (reQ4). This calculation was initiated because no documentation had been found to support the setpoint value given in the SQNP Tech Spec 3.3.3.1 for the main control room air intake monitors (0-RM-90-125, 126) which consist of monitor type RD-32-01. These detectors were installed to protect the operators by isolating the control room in the'event an accident released significant amounts of radioactivity.

The first part of this calculation determines the count rate to be expected at the beginning of a LOCA to see if this value is greater than the setpoint. The second part of the calculation determines the count rate for the beginning of a Fuel Handling Accident (FHA). The third part of this calculation determines the control room operator doses for the entire duration of a byHA-LOCA as if the main control room never isolates. The ratio of the 10CFR5O Appendix A GDC 19 limit of 30 rem inhalation to this dose will become a normalization factor. This normalization factor will then multiplied by the release during the 30-46 see interval to obtain the normalized activity for which the count rate could be determined. The count rate determined in this way will give the initial average count rate at which the operators would receive 30 rem inhalation for the duration of the accident if the MCR never isolates.

The current TS maximum setpoint of 400 cpm for the RM 125, -126 control room intake monitor is more than adequate to assure that the GDC-19 limits are not exceeded.fhlisafety limits for these monitors was determined to be 6.82E4lcpm fvith an intake concentration of 1.28E-3 uCi/cc.

• Microfilm and return calculation to Calculation Library: Address: 0 Microfilm and destroy.

O Microfilm and retum calculation to: -

TVA 40532 (01-19991 Attachment Ala. I & f& -1 s .r1I !_ NEOP-2.1 [01-08-19991 Ide v, ' 4e

-.- _ . I..W