ML20197B404
| ML20197B404 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/09/1986 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Noonan V Office of Nuclear Reactor Regulation |
| References | |
| SBN-1040, NUDOCS 8605130019 | |
| Download: ML20197B404 (14) | |
Text
-
.o SEABROOK STATION 3
Engina ring Office
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yy J
i I
May 9, 1986 emes.*.m m m m w*.
SBN-1040 T.F.
B7.1.2 United States Nuclear Regulatory Commission Washington, DC 20555 Attention:
Mr. Vincent S. Noonan, Project Director PWR Project Directorate No. 5
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 Subj ect :
Operational Meteorological Measurement Program, Outstanding Issue No. 2
Dear Sir:
Enclosed, as Attachment 1, are FSAR Sections 2.3.3 and 2.3.4, and Emergency Plan Section 6.2.3, marked up to describe the Operational Meteorological Measurements Program. This information will be included in a future amendment to the FSAR.
This submittal should be sufficient to close that portion of Out-standing Issue No. 2 (2.3.3) dealing with the Operational Meteorological Measurements Program. We therefore request that this be reflected in the next supplement to the Safety Evaluation Report.
Very truly yours, 4/ M John DeVincentis Director of Engineering Enclosure cc:
Atomic Safety and Licensing Board Service List fYO D
i j
Seabrook Station Construction Field Office. P.O. Box 700 Seabrook, NH 03874
l Diano Curren. E: quire Calvis A. Canneg' N:rmon & Weies City Manascr 2001 S. Street, N.W.
City Mall Suite 430 126 Daniel Street Washin6 ton, D.C.
20009 Portsmouth, NN 0380,1 Sherwin R.1bek. Esq.
Stephen E. Norrill, Esquire Office of the Executive Legal Director Attorney General U.S. Nuclear Regulatory Comunission George Dana Blobee Esquire Tenth Floor Assistant Attorney General 1
Washington, DC 20555 offlee of the Attorney General
~
25 Capitol Street Robert A. Backus Require ConcoN, M 03301-4397 114 Lowell Street P.O. Box 514 Nr. J. P. Nadeau r
)
Manchester, M 03105 Selectmen's Office i
10 Central Road Philip Ahrens. Esquire Rye, MN 03870 Assistant Attomey General Department of The Attorney General Mr. Angle Nachiros Statehouse Station #6 Chairman of the Board of Selectmen hugusta NE 04333 Town of Newbury 1
Newbury NA 01950 Mrs. Sandra Cavutis Chairman. Board of Selectmen Mr. William S. Lord RFD 1 - Box 1154 Bosnt of Selectmen Kennsington, MN 03027 Town Hall - Friend Street Amesbury NA 01913 Carol S. Sneider Esquire Assistant Attorney Geners!
Senator Gordeo J. Numphrey l
Department of the Attorney General 1 Pillsbury Street One Ashburton Place.19th Floor Concord, m 03301 Boston, MA 02104 (ATTN: Norb Roynton)
Senator Gordon J. Humphrey N. Joseph Flynn, Esquire U.S. Senate Office of General Counsel Washington, DC 20510 Federal Energency Management Agency g (ATTN: Tom Durack) 500 C Street SW '
Richard A. Naape. Esq.
l Nampe and McNicholas Paul McEachern. Esquire 35 Pleasant Street Matthew T. Bruck. Esquire i
Concord NN 03301 Shatnes & NcEachern i
25 Naplewood Avenue l
Donald E. Chick P.O. sox 360 l
Town Manager Portsmouth, NN 03801 Town of Exeter 10 Front Street Cary W. Nolmes, Esq.
Exeter. EN 03833 Holmes & Ells 47 Winnacunnet Road Brentwood Board of Selectmen Hampton, NH 03841 l
RFD Dalton Road Brentwood, NH 03833 Nr. Ed Thomas FENA Region I Peter J. Nathews, Mayor 442 John W. McCormack PO & Courthouse City Hall Boston, MA 02109 Newburyport, MA 01950 Stanley W. Knowles, Chainaan Board of Selectmen P.O. Box 110 North Hampton. WH 03862 n
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I Administrative Judge Helen Hoyt, Chairperson Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Administrative Judge Sheldon J. Wolfe, Chairman Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Dr. Emmeth A. Luebke Atomic Safety and Licensing Board Panel U S. Nuclear Regulatory Commission Washington,-D.C. 20555 Dr. Jerry Harbour Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Washington, D.C. 20555 o
sn I s. 2 3g FSAR
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?.1.1 O n-S i,t e;,H,e t i;itr a l o giy,a l_ Me,a s u,r e me n t, _l' r u g r_a,m
.c 3.3. I f b Conslevc.)icn (i(*[:1 Program dh-erecIt d ol b LoIWrk tiYC M
An instrtsnented meteorological data tower, obbh he-ri.ce her U"d Y or pkud eMvcUonrrh :* te-licensig p t h - c -- - b "rF rred by r--t ", ese fuity ep m ti m ! et from November 1971 until June 1974 The tower was 150 feet high with a base at approximately 10 feet MSL, and was located near the south edge of the Browns River, about 700 feet cast of the railroad. The location of the tower relative to the site is shown in Figure 2.3-9.
There were no trees or other vertical obstructions in the immediate vicinity of the tower site. The nearest significant growth was 25-35 foot trees that began about 500 feet to the west and south-west of the tower. There was no significant vegetation between the tower site and Hampton Harbor. Grass was planted under the tower out to a radius of 50 feet to assure conservative delta T data.
The tower was instrumented as shown in Table 2.3-27.
After one year of data accumulation, the original Aerovane wind system at 30 feet was replaced with a Bendix 3-cup anemometer and vane system.
Another Bendix wind system was installed at the 130 foot level at the same time.
(
Wind data were recorded on Bendix Model 141-2 dual strip chart recorders. The temperature systems used Rosemont precision resis-tance bridges and recorded on an Esterline-Angus multi-channel recorder. One channel of the recorder was used to print a reference value of 0 volts from which all traces were calibrated.
The temperature sensors were installed in aspirated shields on the tower.
The vertical temperature difference (delta T) was measured between 30 and 130 ft.
The system was scaled for a range of from -10"F to +180F, for a full span scale of 280F. The Rose-mount platinum resistance sensors and bridge system had an accuracy of 0.1% of span or +0.02 ohms, whichever was greater; the eeximum possible system error therefore was +0.090F.
The recorder accuracy was +0.252 of scale, or +0.070F.
As a result, the maximum delta T sys tem error could be +0.160F, with a probable system error of 10.110F.
All equi pment was checked for normal operation before installation on the tower. At that time, the delta T system was calibrated to a 0.0 F value by means of a simultaneous ice bath of both scosors.
0 All laboratory tests were made with each sensor permanently connected to the cable to be used with the sensor on the tower.
The dew point nensor was installed on the tower in March 1972.
Recorded dew point data had been verified by bi-weekly multiple
(
niing psychrometer readings taken at the 30 foot level on the tower.
2.3-11
SB 1 & 2 Amend me n t 53 FSAR August 1984 Occasional minor adjustments to the recorded dew point data hnd been made t o maint ain the dat a within an accuracy of
+0.5"C.
Data recovery rates for individual tower parameters are given in Table 2.3-28.
This table shows that the Seabrook meteorological program satisfied the 90% data recovery specified in Regulatory Guide 1.23 (Reference 29).
In addi t ion to bi-monthly meteorological strip chart review, every three months recorded temperature were checked against tower valuen obtained with ASTM precision thermometers. Wind systems were checked for trouble-free operation every three months. Wind direction and speed transmitters were removed from the tower and given a complete laboratory check to assure they were working within the manufacturer's specifications at least every six months.
Processing of the on-site meteorological strip charts was as follows.
For hourly data values, a mean value for the 30 minutes preceding the hour was determined directly from the strip charts. This value was transferred to a punched card by means of a Cerber semi-automat ic analog-to-d igi tal converter. The punched cards were checked by computer for consistent values from one hour to the next.
After all checks were verified, a punched card was prepared that contained the date, time and hourly values for all the parameters measured on the tower.
These cards were used to prepare the data '
summaries in Appendix 2A.
('
P e-0pemIional
- e. 3.~5.9.
t 5. U.U,_^2.P,r,og r a m A new 21_0 foot high instrumented meteorological data tower. hee-taas
-4Hwwe c rec ted a t the same location as the old towgr- => 'rer--
ri7j, ;. _ _
3 f__;7,97 4o cellect cla1a ad operulig licenSi r
pupses. %;s n, ear h,w,'becake. 9 pemtional su Apt-i c
79.
The meteorological tower is instrumented for wind measurements at heights o f 13.1 mete rs (43 fee t), and 209 feet above the base.
The tower is located at an elevation of approximately 10 feet MSL, and as such, the low-level wind and temperature sensors are approxi-mately 53 fee t MSL.
Since plant grade is 20 fget MSL, the low-Icvel nensors are located at an elevation of approximately 10m above plant grade rather than 10m AGL.
The dif ference in values mea sured at 33 fee t (10m) ACL versus 43 feet AGL on the meteorological tower should not be significant.
Wind speed and direction are i
observed by Climatronics F460 wind systems which have a starting f>
speed of less than 1.0 miles per hour.
Wind direction and speed are recorded on Enterline-Angus Model LilS2S strip chart recorders.
-The ambient temperature difference is measured on the tower between ISO and 43 feet and between 209 and 43 feet. These data are obtained by Rosemount pl a t i n um temperature sensors and precision resistance bridges and recorded on an Esterline-Angus Model Ell 24E multi-channel recorder. Ambient temperature is also measured by this system for the 43 foot level.
The temperature and delta T sensors
(
installed in Tcledyne Geotech aspirated shicids.
are 2.3-12
SB 1 & 2 Amendment $6 FSAR Hovember 1985 A heated tipping hurket precipitation gauge and an l'.ppley pyranometer are also installed.
r ~ p&
d on mechani_ - _ - -
A digi ecording system i.
primary data 4
the Seabrook Mete gtcal System, analog strtp c are utilized as a p source of dat for quality cpa d analysis.
Table 2.3-28a presents the equipment components, performance specifica-tions, and system error analyses for both the analog and digital data systec Presented values are stmasaries from manufacturer's specification sheets.
' Four fifteen inute averages our of all mete 15 gic al parame are recorded.
trat fifteen mi averages for hour are used nalytical comput
- ograms, f
All equipment was checked and calibrated before installation.
The delta T and temperature systems were calibrated by means of constant-temperataure baths. All equipnent calibration was per-formed with the sensor connected to the cable to be used with the sensor on the tower.
Preventive maintenance and complete calibration checks of the temperature, delta T and dew point systems are performed per Technical Specifications. Wind transmitters are removed from the tower every six months and tested in a low speed wind tunnel for 55 %
normal operation and a starting speed of less than one mile per hour.
The sensors and data processing procedures meet the requirements for time averaged values as specified in NRC Regulatory Guide 1.23.
A meteorological program commensurate with the final plant design and consistent with NRC requirements for on-site meteorology l
programs will be maintained throughout the life of the plant.
2.3.4 Short-Term (Accident) Diffusion Estimates 2.3.4.1 Objective Conservative and realistic estimates of atmospheric diffusion at the site boundary and the outer boundary of the low population zone (LPZ) were calculated for appropriate time periods using meteorological data collected onsite during the time period April 1979 through March 1980, l
- 2. 3.4. 2 Calc ula t ions Caussian diffusion models were used to compute estimates of the local atmos-pheric dilution f actors for the exclusion area boundary and the low population zone using hourly meteorological data collected at the Seabrook site.
Two sets of dilution factors (Cili /Q values) were calculated:
(1) a concentration dilution factor for evaluating ground Icvel concentrations of noble gases, k
tritium, carbon 14 and non-elemental iodines, and (2) an effective gamma 2.3-13
Insert A to FSAR Page 2.3-13 A-digital recording system is the primary data collection mechanism for the Seabrook Meteorological System. A MODCOMP minicomputer located onsite in the Education Center scans the wind parameters at 1-second intervals and all other parameters at 5-second intervals. The data are compiled as 15-minute averages. Four 15-minute averages per hour are tecorded.
The first 15-minute average for each hour is used to represent that hour's data in analytical computer programs. The analog strip charts are utilized as a backup source of data and for quality control analysis.
l Insert B to PSAR 2.3-13 2.3.3.3 Operational Program The 210-foot meteorological tower structure used for plant operating licensing purposes continues to be used during plant operation. The same parameters measured during the pre-operational nonitoring program continue to be monitored.
Wind speed and direction are monitored at 43 feet and 209 feet above ground level with Climatronics F460 wind systems. The ambient tempertaure difference between the 150- and 43-foot levels and the 209-and 43-foot levels are measured with Climatronics Platinum 4-wire temperature probes.
Ambient temperature is measurec by this system at the 43-foot level, and dew point is also measured at the same level by a Climatronics lithium chloride dew point sensor. All temperature sensors are housed in Climatronics notor-aspirated temperature shields. A Belfort heated tipping bucket precipitation gauge and Epply pyranometer collect data near the base of the tower.
A MODCOMP minicomputer located in the Education Center samples and compiles 15-minute averages of all parameters for the purpose of archiving a data base for the Semi-Annual Radioactive Effluent Release Report. The Main Plant Computer System (MPCS) also monitors the wind speed, wind direction, and delta-temperature signals. These signals are sampled at 5-second intervals and compiled into 15-minute averages for input into the station's emergency dose projection methodologies. These 15-minute averages are updated in 15-minute intervals and are available for on-demand display on MPCS terminals located in the Control Room, TSC, and EOF. The Control Room is also able to obtain, on demand, a hardcopy listing of every fourth 15-minute average (e.g. one 15-minute average per hour) for each wind and delta-tempertture parameter for the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
All parameters are recorded on strip chart recorders located in the Instrument Building near the tower's base. These recorders are utilized as a backup source of data and for quality control analysis. Wind data are recorded on Esterline-Angus Model L11S2S strip chart recorders; the temperature, delta-temperature, dew point, precipitation, and solar radiation data are recorded on an Esterline-Angus Model Ell 24E multichannel recorder.
Table 2.3.28b presents the equipment components, performance specifications and system error analyses for both the analog and digital data systems.
Presented values are summaries from manufacturer's specification sheets.
A daily channel check of the wind and delta-temperature instrumentation is performed in accordance with station Technical Specifications to denenstrate channel operability. Corrective action in initiated if any of the meteorological instrumentation is determined to be malfunctioning.
The equipment preventative maintenance and calibration activities conducted during the pre-operational monitoring program continue during the operational monitoring program. These activities occur at a frequency compatible with the station's Technical Specifications. The data analysis procedures used to identify invalid hourly data remain unchanged from those used during the pre-operational monitoring program.
e TABLE 2.3-28a
.IXTST) M f!A METEOROLOGICAL INSTRUMENTATION SPECIFICATIONS vot ws. Tae-opeumowm. wwnotunir enecem I
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a y37.$tSt-SQUARED MMICFACTURER TERESEOLD OB IEWIDFACTWER IIhpWFACTURER ItMfUFACTURER (IS AVERACED
&leOEL AApCE Ma'MT SENSIT!Y1TT
& ISDEL ACCURAST
& ISDEL ACCURACT
& leDEL ACCCRACT Vted SAe e
.'t 0.5 mph C11mettemice e to 100 mph 2 0.15 mph 0.50 mph Citamtreates t 0.25 totestine j
F440 er it Threshold 300070 Angus P
Trementater L1152S
- 0.252 I
Wind
' t S.08 Citeatroatco O* to $40' 2 3' O.Semph C18metreetce t 0.0S$
els" Chart Directtea F460 Threshold 100077 -
Tramonitter Med Coup Temperat*
Temp:
Telodyne Temp:
Seneers Temps C11astreetce
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<t 0.9'r Centech 327
-300 ce 2 0.47'F 0.2*F 190142 Ameles 2 0.051 l
htta Tems.-
twita T Aap. Shield o!!0 F f O'C leestemum 190143 2 0.052 Estertime Input a33
,f, 8
< t 0.18'F Roosment 70 2 0.95*F Bedtatten Aneue Subsystem 3;
P Seneers
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+110 F 100009 lasittpetet 49
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- 0.01 tech Selfort p/A s 0.01 tech C11astreates 2 0.051 10" Chart
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' C, (8) The General Eastern dew point system was replaced in May 1981 with a Climatronics Model DP-10 lithium hg chlon.ie dew point system with -a range from -300F to 1100F and an accuracy of + 0.90F, 7, 2'-
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FSAR November-I W 6.2 Assessment Capability of accident The activation of this plan and the continual assessment conditions require extensive monitoring and assessment capabilities. The essential monitoring systems needed to allow recognition of abnormal events by the station operators will be used in the techniques developed for accident classification. This section briefly describes these monitoring systems as well as other assessment capabilities.
I 6.2.1 Process Monitors Station process monitor capability includes many process monitor indications provided from various sensors located throughout the station systems.
Para-meters monitored include pressure, temperature, flow, level and equipment These monitoring systems address the requirements of operating status.
Regulatory Guide 1.97 (Revision 2).
6.2.2 Radiation Data Manaaement Systes (RDMS)
The RDNS provides the operators with the ability to assess station radiological conditions during normal operations, as well. as radiological energency conditions. The RIMS is a microprocessor-based acquisition and display system. Field mounted detectors cosmnunicate individually to their own microprocessor which in turn communicates to two central processing units (CPU) on a redundant comunication loop. The various parameters monitored include general area radiation, process radioactivity levels, sirborne contamination levels, and effluent radioactivity levels.
The quantity and diversity of the parameters monitored, along with the display capabilities of
'the RDHS, provide the operator with suf ficient warning of accident conditions as well as continual accident assessments. However, the primary means of quantitatively evaluating system and plant radioactivity levels will be through a program of collecting physical samples and subjecting these physical samples to laboratory analysis to identify specific isotopes and their relation to the RDMS.
4 Each of the RDMS monitors alarms in the Control Room and Operational Support Center for a variety of alarm conditions (i.e., high level, alert, power failure, etc.).
This systes addresses the requirements of Regulatory Guide 1.97 (Rev. 2).
95 6.2.3 Geophysical Phenomena Monitors 6.2.3.1 Meteorological FSeabrook St clon maintains a 210 foo igh meteoro Ical tower located near the sout edge of
s River shown in F ure 6.1.
Mete sciogical j
input originat rom the pr ry sensors cated on the eorologicy 2
The p ameters no ored inclu, vertical ter3 ature diJJetences jtow 6-4 E
F t
,e
,._.-,~,_m..., _. -.. _., _. -... _ _........, _.. _ _,.,
_ _ _ -,__ - -__ m - - __ -,
SB 1&2 Amendment 58 FSAR April 1986 bet and 150 feet and between 43 and 209 feet (AT), wind vslocity ani rdogical data from the tower,will-be'eGed and direction. The o
recorded as 15-minute averaTe S
ook station process computer.
Strip chart recorders wjil1minu to o backup source of data as l
well as NSD 1 LEramingEam, MA which has access to We h ices 4g l
Interest M (WSI).
N Nst. C. &> A dispersion model is available on a minicomputer to produce initial transport and diffusion artisates for the plume exposure E,eergency Planning Zone. The model produces plume dimensions, position, and relative concentrations.at several downwind locations. Using offluent release information and a' finite 4
cloud extetual gasene dose model, estimates of near real-time dose rates 'will also be available. The model has the graphics capability of drawing plume position over a background esp of the site. More information on these calculat' ion techniques is given in Section 10 1 1 of this plan.
4 6.2.3.2 Seismic Seabrook Station has installed seismic monitoring equipment with alarms indicated in the Control Room. The equipeent consists of:
1)
Triaxial Time Ristory Acceldrographs capable of measuring and per-manently recording the absolute acceleration versue time for both
\\
horisontal and vertical motion; 2)
Triaxial Response Spectrum Recorders espable of permanently recording peak responses as a function of frequency for both horizontal and vertical actions; and 3)
Triaxial Peak Accelerographs capable of permanently recording peak acceleration.
The Control Roos Video Alarm System will indicate the following:
1)
Earthquake in progress; 2)
Operating Basis Earthquake exceeded; and/or 3)
When a Triaxial Time History Accelerograph is initiated.
6.2.3.3 Rydrolog'ic Seismic Category I structures that house safety-related equipment have been l,
designed to withstand a depth of still water on the station grade (+20.6 f t.
Mst.) of 0.6 feet. Access openings in exterior walls that are below the design 6-5 I
6 r
.~.,.,__._--_-_m,.c,
.c,...-
m.,_,,.,
~,_-_,w 7
Insert C to Radiological Emergency Plan Page 6-5 Seabrook Station maintains a 210-foot high meteorological tower located near the south edge of Brown's River, as shown in Figure 6.1.
The parameters monitored include wind speed and direction at 43 feet and 209 feet above ground level, and vertical temperature difference (delta-T) between 43 and 150 feet and between 43 feet and 209 feet. The meteorological data from the tower are scanned and recorded as 15-minute averages by the Main Plant Computer System (MPCS). These averages are available for on-demand display on MPCS terminals located in the Control Room, TSC, and EDF. Strip Chart recorders located in the Instrument Shed at the base of the tower serve as backup recording mechanisms.
Se Yankee Nuclear Services Division (YNSD) maintains a subscription with Weather Services International (WSI). 2 rough the use of a terminal located in the EOF, emergency response personnel can access recent weather data from surrounding weather stations as well as long-range forecasts for the site region. YNSD meteorological services personnel can access and review the same information from the Engineering Support Center and assist the EOF in interpreting its results. YNSD meteorological services personnel are also available to assist EOF dose assessment personnel in evaluating the effects of Seabrook Station's coastal environment on plume transport and diffusion.
Additional sources of meteorological information include the Portland, ME and Concord, NH National Weather Service (NWS) Offices.
Pease Air Force Base, located approximately 13 miles ISE of Seabrook Staton, is the best source for backup meteorological measurements should data from the 210-foot onsite tower be unavailable. Hourly Pease AFB meteorological measurements are available via the WS1 System and the Portland and Concord IMS Offices.
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