ML18017A465

Forwards Suppl 3 to SER Describing Meteorological Collection Sys to Be Used to Obtain Addl 1 Full Year Period of on-site Meteorological Data.Requests Review & Approval of Proposed Sys by 781127

ML18017A465
Person / Time
Site:	Harris
Issue date:	09/18/1978
From:	Mcduffie M CAROLINA POWER & LIGHT CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
NUDOCS 7811140216
Download: ML18017A465 (13)

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Carolina Power 8, Light Company November 9, 1978 Hazold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D ~

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20555 SHEARON HARRIS NUCLEAR POWER PLANT, UNIT NOS

~ 1, 2, 3, AND 4 DOCKET NOS

~ 50-400, 50-401, 50-402, AND 50-403 METEOROLOGICAL COLLECTION PROGRAM

Dear Mr. Denton:

Supplement No.

3 to the NRC Staff's Safety Evaluation Report for the Shearon Harris Nuclear Power Plant (SHNPP) requir es Carolina Power

& Light Company (CP &L) to provide an addi tional one full year per iod of on-site me teoro-logical data, which meets the zecommendations of Regulatory Guide 1. 23, using a revised meteorological collection system acceptable to the NRC prior to submittal of the SHNPP Final Saf ety Analysis Report (FSAR).

Attachment A descr ibes the meteorological collection system which CP&L intends to use to obtain the zequired meteorological data.

In order to ensure that the data is collected prior to submittal of the-FS'AR, we request that you, review and, approve our proposed system by November 27', 1978.

We would be glad to meet with you at any time to aid your review.

Please let us know if you. have any questions.

Yours very truly, Senior Vice President Engineering

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ATTACHM~ A

1.0 INTRODUCTION

'SA Carolina Power

& Light Company (CP&L) has decided to modify the meteorological data collection system at the Shearon Harris Nucleaz Power Plant (SHNPP) site to further enhance the collection of zepresentative on-site data and the accuracy of the total system.

In implementing this

decision, CP&L has contracted The Research Corporation of New England (TRC) to design and install a data-collection system utilizing solid state tech-nology of mini-computer systems.

The basic design-will be patterned after a system that TRC has installed and operated foz the New York Electric and Gas Company at a proposed nuclear or fossil generating site.

This system has completed one year's operation as of, March 1978 with a greater that 95X meteorological data.

recovery achieved.

It is intended that the same or better results will be achieved by the SHNPP modified collection system.

The SHNPP modified system will use the existing meteorological

sensors, but new processor cards on some. sensor systems will interface with the proposed'ollection system.

This will allow. a common input signal, thus further reducing system errors..

The" system will scan the sensors, digitize the data and, telemeter the digitized data to our central office for further, pzocessing and storage.

The advantages and specifics of the system will be presented later in this document'.,

It is the belief of CP&L and TRC that the proposed modification should. be acceptable to the NRC'nd thus satisfy the statement which appears in the. SHNPP PSAR Section 2.3.7.1.,

On-Site Meteorolo ical Data:

"CP&L will modify the on-site meteorological program at the SHNPP site to minimize uncertainties in the data recording system, particularly for stable conditions under lignt winds.

Utilizing a revised system acceptable to the. NRC, CP&L will provide a one full year period of on-site meteorological data which meets the recommendations of R.G. 1.23 prior to submittal of the FSAR."

The upgrade of the existing Meteorological Monitoring System at the SHNPP Site will include an on-site Monitor Labs System 9300

(~Q. 9300) data logger with diskette storage capability.

The data logger will be interfaced to the CP&L Harris S125 minicomputer, located in the Raleigh, N. C.

offices, via normal telephone lines.

Necessary signal conditioning equipment (i.e.,

translator cazds) will be utilized to interface all signals curzently sampled at the SHNPP Site to the ML 9300 data logger.

The existing Mestinghouse Meteorological Monitoring System and associated strip chart recorders will zemain and operate in parallel to the new ML 9300 digital system.

The following two sections desczibe the upgrade of the SHNPP Meteorological Monitoring System and the resulting digital system accuracy.

2.0 METEROLOGICAL MONITORING SYSTEM UPGRADE DESCRIPTION The ma)or hardware of the new system will consist of a rack mounted Monitor Labs System 9300, necessary signal conversion and conditioning, and a.

Techtran Model. 9512 Micro Disk (i.e., floppy disk) with modem located at the Shearon Harris Nuclear Plant Site and will utilize the CP&L Harris S125 minicom-puter system located at the general offices. in Raleigh, N. C.

See figure 2-1 for system block diagram.

The Shearon Harris Nuclear Plant Site (which will he referred to as the Remote Site) hardware will be based on the Monitor Labs

(~K) System 9300 in order to acquire data.

The ML 9300 will be configured for 20 analog input channels and has: a maximum expansion capability to 1040 channels.

The ML 9300 is configured with the following hard~are features:

20 analog input channels alphanumeric display.

6-line/sec.,

16 column alphanumeric printer.

Clock, DDD:

HH:

Kt:

SS, with battery take over in the event of. power outage.

High resolution digitizer (0.01K', 0.1'F 000.0'C),

30,000 counts per voltage range.,

4, voltage* ranges:

+3.000mV; +300,00mV, +3.0000V., +12,000 V

with autoranging.

Scaling:

Digital spans and zero suppression (Y Mx+3) pro-grammable by channel.,

This feature scales inputs to engineering 'units.

Digital averaging:

averaging interval is selectable; per channel enabling of averaging; invalid (overrange) data is excluded from average.

Program save memory:

Permits storage of channel parameters with automatic restart. on power up.

Data output interface to Techtran Model 9512 Micro-Disc.

Self-Test:

Self diagnostics are executed through internal programs of 9300.

These programs allow checkout of'he digitizer, 9300

CPU, EAROM, dynamic RAM, clock, keyboard, display and printer.

The ML 9300 will be interfaced with the 13 parameters presently at the Shearon Harris Nuclear Plant Site and provide 7 spare analog input channels for later expansion..

The 13 input channels will monitor two levels of wind speed, direction and variance, two dewpoints parameters, temperature, two delta tempera-ture parameters, precipitation, and solar radiation.

'Climatronics translator cards will'be installed to convert precipitation instrument pulses, tempera-ture and delta temperature instrument milliamps, and lithium chloride dewpoint monitor resistance to the 0-5 volt range.

This will allow compatibility between all, instrumentation signals and the ML 9300.

The ML 9300 is interfaced to a Techtran Model 9512 Micro-Disc having over 250,000 characters of storage capacity.

This allows approximately 23 days of data storage for the present configuration of 13 parameters and over 14 days data storage with the maximum planned configuration of 20 parameters.

The

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Techtran 9512 will be interfaced to the Harris S125 minicomputer via a modem and standard. voice grade telephone lines.

The Techtran 9512 utilizes simple remote terminal protocol, i.e., simple ASCII character commands actuate the unit.

Output from the 9512 will also be ASCII characters.

Plug. in surge protection will guard against power surges for both the ML 9300 and the Techtran Model 9512 Micro-Disc.

The CP&L located Harris S125 minicomputer system hardware will be utilized to access-data from the Techtran 9512 Micro-Disc located at Remote Site.

The Harris S125 minicomputer will.utilize an auto-call telephone line interface to the Techtran 9512 Micro-Disc.,

The S125 minicomputer will be programmed to utilize this line to calL the Remote Site according to a selectable schedule (i.e., say, each 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />) retrieve the data for the period and store the data on a disk. file.

3.0 DIGITAL SYSTEM SAMPLING RATES AND ACCURACY The Remote Site data collection and storage is performed by a Monitor Labs 9300 interfaced to a Techtran Model 9512 Micro-Disc.

The ML 9300 is programmed via simple front panel key-in commands into an EARON memory.

The ML 9300 will be programmed to scan all inputs except precipitation each 10 seconds.

The precipitation input will be. converted (via a translater card) to a constant voltage proportional to the amount of precipitation (determined by the pulse count).

This precipitation voltage will be input to the ML 9300 and scanned once each 15 minutes.

(The Harris S125 will determine differences between 15 minute accumulations to determine precipitation for the 15 minute period).

All inputs will be digitized, converted to engineering units and averaged into 15 minute averages by the ML 9300.

These 15 minute averages will then be output to the Techtran Model 9512 Micro-Disc for storage.

Each output record to the Model 9512 will be prefixed by the clock time (in days, hours, minutes, seconds) and system status (which will indicate wnether a power failure occured during the averaging period) followed by the parameter data.

Each parameter's data will include number, sign and five digits for the data plus a decimal point, three alphanumeric characters for the engineering units and 3 digits indicating the number of samples included in the average.

The average will be considered valid if at least 10 minutes (i.e.,

60 scans) of data were collected during the 15 minute averaging period.

The digital system accuracy is composed of errors contributed from.

the sensor, processor card and Monitor Labs System 9300 data logger.

Two types of errors will be considered.

.+pe 1:

Absolute error-random.

Ezrors in this category are sensor and processor errors which include other "noise" sources.

Sensor and processor errors are generally assumed not to be inde-

pendent, in the absence of direct evidence of, such independence.

Absolute error-Systematic.

Ezrors in this category are of the "calibration" type and are expected to be steady over each averaging period (i.e.,

15 minutes).

The digital data logger erzors are treated as Type 2.

The digital data logger error (Monitor Labs System 9300) has an error equal to W.OZX Reading +.0.017 Range

+1 digit.

For purposes of this discussion, the "Reading" will be the full scale value; the "Range" will be the maximum +12 Volt range permitted;, the "+1 digit" will be equal to 0.0001 V (which is approximately the analog to digital convertez, resolution).,

The error due to the digital data logger alone is as follows:

Reading:

Range:

+1 Digit:

5V ++0.0002

+0.0010V 12V ++0.0001

~ +0.0012V 1 pazt in 12,000

~ +0.0001V Taking the square root of the sum of squares will yield the following data logger error:

Data logger error

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(+.0010V) +(+.0012V) +(+.0001V) 2 Data logger erzoz

~ 0.0016V Hence, for the wind speed parameter, the Digital Data Logger for the sensor having a range of 0 to 100 mph corresponding to 0 to 5 volts, is:

Data Logger Ezroz

~ (100 mph/5.0 Volts)

• 0.0016 Volts Data Logger Error 0.032 mph for the wind speed pazameter.

The digital system calculates 15-minute averages using 90 ten-second samples for all parameters with the exception of precipitation which is sampled each 15 minutes.

The following table lists the composite digital system errors for the 15-minute averages of each parameter.

The appendix includes the work sheets used zo calculate these averages.

TABLE 3-1 COMPOSITE DIGITAL SYST&1 ERRORS (15-Minute Avera es Parameter Composite 15 Minutes Avera e Error A.

Wind Speed B.

Wind Direction C.

Wind Variance D.

Cambridge Dew Point System E.

Honeywell Dew Point System F.

Differential Temperature G.

Ambient Temperature H.

Barometric Pressure I.

Total Precipitation J..

Solar Radiation 0.162 mph 0.876 degrees 0.596 degrees 0.074'F 0.225 F

0.0225'F 0.0849'F 0.0034 inches of Hg 0.0055 inch 0.0049 Langleys

APPENDIX WORK'HEETS

A.

MIND SPEED (WS)

T e 1-Error Scale

~0-100 m 8 a ~

b.

\\st Sensor:

0.4 mph or 1.X, whichever is greater Processor:

0.57 of full scale 1.0 mph 0.5 mph

~emy T

e 2 Error C ~

Data Logger:

2 Digital System Error (WS, 15 mio. avg.)

+ 0 (a+b) 2 N

no. of samples per 15 minute average ra 90 0.032 mph Digital System Error (WS, 15 minute average) tm..........

0.162 moh B.

MIND DIRECTION (WD)

T e

1 Error Scale 0 to 540 de rees a.

Sensor b.

Processor:

0.5X of full scale T

e 2 Error 5.4 degrees 2.7 degrees c.

Data Logger:

0.173 degrees Digital System Error (WD, 15 minute average) 0.876'.

'MIND VARIANCE (MV)

Scale 0 to 45 de rees a..

Sensor b.

Processor:

+0.5/ full scale 5.4 degrees 0.225 degrees T

e 2 Error c.

Data Logger:

Digital System Error (MV, 15 minute average)

=

0.0144 degrees 0.596'

D.

CAMBRIDGE DEW POINT SYSTEM Scale

-40 to 120'F a.

Sensor System 0.5'F T

e '2 Error ae

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b.

Data Logger:

0.051'F Digital System Error (Cambridge DP, 15 minute average) 0.074'P E.

HONEYWELL DEW POINT SYSTEM T

e 1 Error Scale

-50 to 100 F a ~

b.

Sensor Processor:

0.05Z full scale 2.0'F 0.075'F T

e 2 Ezror Ce Data Logger:

0. 048'F Digital System Error. (Honeyuell DP, 15 minute Average)........

0. 225'P F.

DIFFERENTIAL TEMPERATURE (DT)

T e 1 Error Scale

-10 to +15'F a.

Sensor b.,

Processor:

.05Z full scale 04186'F 0.0125'F c.

Data Logger:

0.008'F Digital System Error (DT, 15 minute average)

~................

0.0225'F G.

AMBIENT TEMPERATURE (AT)

T e

1 Error Scale

-50 to 130'F a.

Sensor b.

Processor:

0.05Z full scale 0.498'F 0.090'F T

e 2 Error c.

Data Logger:

0.0576'F Digital System Error (AT, 15 minute average)

=.................

0.0849'F

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H.

BAROMETRIC PRESSURE (BP)

T e

1 Error Scale 28 to 32 inches H

a%

b.

Sensor:

(at 70'F, error ~

V(0.006)

+ (0.1)

)

2 Processor:

0.5% of full scale k.

0.01 in.

Hg 0.02 in. Hg c.

Data Logger:

0.00128 in.

Hg I.

TOTAL PRECIPITATION (P)

Scale 0 to 1 inch a.

Sensor:

1 pulse per 0.01 inch of precipitation and 0.5% of full scale b.

Processor:

+0.05% full scale 0.0050 in.

0. 0005'n.

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Data Logger:

0.00032 in.

Digital System frror2(P, 1 sample per 15 minute period)

(a+b )

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SOLAR RADIATION T

e 1 Error Scale 0 to 2 Lan le s a.

Sensor b.

Preamplifier:

+0.25% full scale c.

Processor:

+0.05% full scale 0.04 Langleys 0.005 Langleys 0.001 Langleys T

e 2 Error d.

Data Logger:

0.00064 Langleys Digital System Error (Solar Radiation, 15 min. avg.)

~....

0.0049 Lan levs

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"RBGUIATORY%FORMATION DISTRIBUTION SQLTSM

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DOCKET NBR:

401 402 SHEARON HAR-'OC DATE:

~RlM RECIPIENT-NTON H. R.

ACCESSION NBR:

7811140216 ORIGINATOR: MCDUFFIE M."A.

COPIES RECEIVED:

COMPANY NAME:

CAROLINA PWR '6 IIGHT LTR 1

ENCL

SUBJECT:

SIZE: 10 Forwards su 1 to SER describing meteorological collection sys to be used o obtain addi 1 Full year period of on-site meteorological data.

Requests review 6 a roval of proposed sys by 781127.

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