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Category:ENVIRONMENTAL MONITORING REPORTS(&RADIOLOGICAL)-PERIODIC
MONTHYEARML18016B0191998-12-31031 December 1998 Corrected Pages to Annual Radioactive Effluent Release Rept, for 1998 for HNP ML18016A9331998-12-31031 December 1998 Annual Radioactive Effluent Release Rept for Jan-Dec 1998. ML18016A9291998-12-31031 December 1998 Shnpp Unit 1 Annual Environ (Nonradiological) Operating Rept for Jan-Dec 1998. with 990428 Ltr ML18016A9271998-12-31031 December 1998 1998 Annual Radiological Environ Operating Rept for Harris Nuclear Plant. with 990428 Ltr ML18016A8211998-12-31031 December 1998 Number of Personnel & Man-Rem by Work & Job Functions, 1998,Harris Plant. with 990218 Ltr ML18016A4121997-12-31031 December 1997 Annual Radioactive Effluent Release Rept for Jan-Dec 1997. ML18016A4081997-12-31031 December 1997 Radiological Environ Operating Rept for 1997. W/980428 Ltr ML18016A4071997-12-31031 December 1997 Annual Environ (Nonradiological) Operating Rept,App B for 970101-1231. W/980427 Ltr ML18016A3301997-12-31031 December 1997 1997 Annual Operating Rept of Individuals Receiving Exposures Greater than 100Mr/Yr. W/980226 Ltr ML18022B0141996-12-31031 December 1996 Annual Radioactive Effluent Release Rept 960101-1231. W/970414 Ltr ML18012A7771996-12-31031 December 1996 Annual Radiological Environ Operating Rept for 1996. W/ 970428 Ltr ML18012A7541996-12-31031 December 1996 Radiological Environ Operating Rept for Shearon Harris Nuclear Power Plant,Jan-Dec 1996. ML18012A6381996-12-31031 December 1996 Annual Environ (Non-Radiological) Operating Rept,App B for 960101-1231. W/970428 Ltr ML18012A5401996-12-31031 December 1996 Numbers of Personnel & Man-Rem by Work & Job Function,1996 Harris Plant. W/970227 Ltr ML18012A4281996-10-31031 October 1996 NPDES Discharge Monitoring Rept for Oct 1996 for Perry Nuclear Power Plant. W/961115 Ltr ML18012A2401995-12-31031 December 1995 Annual Environ (Nonradiological) Operating Rept,App B for Jan-Dec 1995. W/960430 Ltr ML18012A2391995-12-31031 December 1995 Annual Radioactive Effluent Release Rept Jan-Dec 1995. W/ 960430 Ltr ML18012A2341995-12-31031 December 1995 1995 Annual Radiological Environ Operating Rept,Vols I- Iii. W/960429 Ltr ML18012A1471995-12-31031 December 1995 Number of Personnel & Man-Rem by Work & Job Function,1995. W/960221 Ltr ML18011B0801994-12-31031 December 1994 Revised Semi-Annual Effluent Release Rept for Period of Jul-Dec 1994. ML18011A8021994-12-31031 December 1994 Semiannual Radioactive Release Rept Jul-Dec 1994. ML18011A7961994-12-31031 December 1994 Annual Operating Rept, Consisting of Info Re Number of Individuals Receiving Exposures Greater than 100 Mrem/Yr, Primary Coolant Iodine Spikes & Challenges to PORVs & Safety Valves for 1994.W/950223 Ltr ML18022A9541994-12-31031 December 1994 Radiological Environ Operating Rept, Vols I,Ii & Iii.W/ 950421 Ltr ML18022A9601994-12-31031 December 1994 Annual Environ (Nonradiological) Operating Rept for Jan -Dec 1994. W/ 950421 Ltr ML18011A5571994-06-30030 June 1994 Semiannual Radioactive Effluent Release Rept for Jan-June 1994. ML18011A4041993-12-31031 December 1993 Vols 1,2 & 3 of Radiological Environ Operating Rept 1993. ML18011A4241993-12-31031 December 1993 Shnpp Unit 1 Annual Environ (Nonradiological) Operating Rept,App B,Jan-Dec 1993. W/940428 Ltr ML18011A3591993-12-31031 December 1993 Semiannual Radioactive Effluent Release Rept Jul-Dec 1993. W/940228 Ltr ML18011A3571993-12-31031 December 1993 Annual Operating Rept for 1993, Including Number of Personnel & man-rem by Work & Job Function,Primary Coolant Iodine Spikes & Primary Relief & Safety Valve challenges.W/940225 Ltr ML18011A1171993-06-30030 June 1993 Semiannual Radioactive Effluent Release Rept Jan-June 1993. ML18010B0601992-12-31031 December 1992 1992 Statistical Summary Rept for Shearon Harris Nuclear Power Plant,Unit 1, Per 10CFR20.407.W/930312 Ltr ML18010B0821992-12-31031 December 1992 Annual Environ (Non-Radiological) Operating Rept. W/930430 Ltr ML18010B0831992-12-31031 December 1992 Radiological Environ Operating Rept,1992 for Shearon Harris Nuclear Power Plant. W/930429 Ltr ML18010B0181992-12-31031 December 1992 Semiannual Radioactive Effluent Release Rept,Jul-Dec 1992. W/930224 Ltr ML18010A7291992-06-30030 June 1992 Semiannual Radioactive Effluent Release Rept,Jan-June 1992. W/920827 Ltr ML18010A5451991-12-31031 December 1991 Semiannual Radioactive Effluent Release Rept for Jul-Dec 1991. ML18010A5341991-12-31031 December 1991 Annual Personnel Monitoring Rept for Shearon Harris Nuclear Power Plant for 1991. W/920218 Ltr ML18010A5491991-12-31031 December 1991 Personnel & Man-Rem by Work & Job Function for 1991. W/ 920224 Ltr ML18010A6111991-12-31031 December 1991 Radiological Environ Operating Rept 1991,Harris Nuclear Project. ML18010A6141991-12-31031 December 1991 Radiological Environ Operating Rept,Vol III,Jul-Dec 1991 Sample Analyses Data. ML18010A6151991-12-31031 December 1991 Annual Environ (Nonradiological) Operating Rept,1991. W/920424 Ltr ML18010A6301991-12-31031 December 1991 Amended Shearon Harris Annual Operating Rept for 1991. ML18010A3731991-06-30030 June 1991 Semiannual Radioactive Effluent Release Rept,Jan-June 1991. W/910830 Ltr ML18010A6131991-06-30030 June 1991 Radiological Environ Operating Rept,Vol II,Jan-June 1991, Sample Analyses Data. ML18022A8151990-12-31031 December 1990 Annual Radiological Environmental Monitoring Rept for 1990. W/910422 Ltr ML18009A8221990-12-31031 December 1990 Semiannual Radioactive Release Rept,Jul-Dec 1990. W/910227 Ltr ML18009A8751990-12-31031 December 1990 Annual Environ (Nonradiological) Operating Rept for 1990. W/910422 Ltr ML18009A6371990-06-30030 June 1990 Semiannual Radioactive Effluent Release Rept Jan-June 1990. W/900830 Ltr ML18009A5131989-12-31031 December 1989 Annual Environ (Nonradiological) Operating Rept for 1989. W/900430 Ltr ML18009A4981989-12-31031 December 1989 Radiological Environ Operating Rept,Vol III,Jul-Dec 1989, Sample Analyses Data. 1998-12-31
[Table view] Category:TEXT-ENVIRONMENTAL REPORTS
MONTHYEARML18016A8211998-12-31031 December 1998 Number of Personnel & Man-Rem by Work & Job Functions, 1998,Harris Plant. with 990218 Ltr ML18016A9271998-12-31031 December 1998 1998 Annual Radiological Environ Operating Rept for Harris Nuclear Plant. with 990428 Ltr ML18016A9291998-12-31031 December 1998 Shnpp Unit 1 Annual Environ (Nonradiological) Operating Rept for Jan-Dec 1998. with 990428 Ltr ML18016A9331998-12-31031 December 1998 Annual Radioactive Effluent Release Rept for Jan-Dec 1998. ML18016B0191998-12-31031 December 1998 Corrected Pages to Annual Radioactive Effluent Release Rept, for 1998 for HNP ML18016A3301997-12-31031 December 1997 1997 Annual Operating Rept of Individuals Receiving Exposures Greater than 100Mr/Yr. W/980226 Ltr ML18016A4071997-12-31031 December 1997 Annual Environ (Nonradiological) Operating Rept,App B for 970101-1231. W/980427 Ltr ML18016A4081997-12-31031 December 1997 Radiological Environ Operating Rept for 1997. W/980428 Ltr ML18016A4121997-12-31031 December 1997 Annual Radioactive Effluent Release Rept for Jan-Dec 1997. ML18022B0141996-12-31031 December 1996 Annual Radioactive Effluent Release Rept 960101-1231. W/970414 Ltr ML18012A5401996-12-31031 December 1996 Numbers of Personnel & Man-Rem by Work & Job Function,1996 Harris Plant. W/970227 Ltr ML18012A6381996-12-31031 December 1996 Annual Environ (Non-Radiological) Operating Rept,App B for 960101-1231. W/970428 Ltr ML18012A7541996-12-31031 December 1996 Radiological Environ Operating Rept for Shearon Harris Nuclear Power Plant,Jan-Dec 1996. ML18012A7771996-12-31031 December 1996 Annual Radiological Environ Operating Rept for 1996. W/ 970428 Ltr ML18012A4201996-11-11011 November 1996 NPDES Noncompliance Notification:On 960930,exceeded Daily Max Limit & Monthly Average Limit of BOD5 During Reporting Period.Caused by Reduction in Chlorine Contact Time.Reviewed Operational Procedures ML18012A4281996-10-31031 October 1996 NPDES Discharge Monitoring Rept for Oct 1996 for Perry Nuclear Power Plant. W/961115 Ltr ML18012A1931996-03-29029 March 1996 NPDES Noncompliance Notification:On 960326 Internal Audit Identified Concern W/Sampling Frequency for Fecal Coliform at Heec Outfall.Investigation in Progress & Upon Completion Results Will Be Communicated ML18012A1471995-12-31031 December 1995 Number of Personnel & Man-Rem by Work & Job Function,1995. W/960221 Ltr ML18012A2401995-12-31031 December 1995 Annual Environ (Nonradiological) Operating Rept,App B for Jan-Dec 1995. W/960430 Ltr ML18012A2391995-12-31031 December 1995 Annual Radioactive Effluent Release Rept Jan-Dec 1995. W/ 960430 Ltr ML18012A2341995-12-31031 December 1995 1995 Annual Radiological Environ Operating Rept,Vols I- Iii. W/960429 Ltr ML18011B0251995-09-13013 September 1995 NPDES Noncompliance Notification:On 950908,discovered Zinc Concentrations of Approx 3 Ppm in Cooling Tower Blowdown Discharge.Caused by Decrease in Ph of Cooling Tower Water. Cause of Ph Change Being Investigated ML18022A9601994-12-31031 December 1994 Annual Environ (Nonradiological) Operating Rept for Jan -Dec 1994. W/ 950421 Ltr ML18022A9541994-12-31031 December 1994 Radiological Environ Operating Rept, Vols I,Ii & Iii.W/ 950421 Ltr ML18011B0801994-12-31031 December 1994 Revised Semi-Annual Effluent Release Rept for Period of Jul-Dec 1994. ML18011A8021994-12-31031 December 1994 Semiannual Radioactive Release Rept Jul-Dec 1994. ML18011A7961994-12-31031 December 1994 Annual Operating Rept, Consisting of Info Re Number of Individuals Receiving Exposures Greater than 100 Mrem/Yr, Primary Coolant Iodine Spikes & Challenges to PORVs & Safety Valves for 1994.W/950223 Ltr ML18011A5571994-06-30030 June 1994 Semiannual Radioactive Effluent Release Rept for Jan-June 1994. ML18011A3571993-12-31031 December 1993 Annual Operating Rept for 1993, Including Number of Personnel & man-rem by Work & Job Function,Primary Coolant Iodine Spikes & Primary Relief & Safety Valve challenges.W/940225 Ltr ML18011A3591993-12-31031 December 1993 Semiannual Radioactive Effluent Release Rept Jul-Dec 1993. W/940228 Ltr ML18011A4041993-12-31031 December 1993 Vols 1,2 & 3 of Radiological Environ Operating Rept 1993. ML18011A4241993-12-31031 December 1993 Shnpp Unit 1 Annual Environ (Nonradiological) Operating Rept,App B,Jan-Dec 1993. W/940428 Ltr ML18011A1171993-06-30030 June 1993 Semiannual Radioactive Effluent Release Rept Jan-June 1993. ML18010B0831992-12-31031 December 1992 Radiological Environ Operating Rept,1992 for Shearon Harris Nuclear Power Plant. W/930429 Ltr ML18010B0821992-12-31031 December 1992 Annual Environ (Non-Radiological) Operating Rept. W/930430 Ltr ML18010B0601992-12-31031 December 1992 1992 Statistical Summary Rept for Shearon Harris Nuclear Power Plant,Unit 1, Per 10CFR20.407.W/930312 Ltr ML18010B0181992-12-31031 December 1992 Semiannual Radioactive Effluent Release Rept,Jul-Dec 1992. W/930224 Ltr ML18010A7291992-06-30030 June 1992 Semiannual Radioactive Effluent Release Rept,Jan-June 1992. W/920827 Ltr ML18010A5491991-12-31031 December 1991 Personnel & Man-Rem by Work & Job Function for 1991. W/ 920224 Ltr ML18010A6301991-12-31031 December 1991 Amended Shearon Harris Annual Operating Rept for 1991. ML18010A6111991-12-31031 December 1991 Radiological Environ Operating Rept 1991,Harris Nuclear Project. ML18010A5341991-12-31031 December 1991 Annual Personnel Monitoring Rept for Shearon Harris Nuclear Power Plant for 1991. W/920218 Ltr ML18010A6141991-12-31031 December 1991 Radiological Environ Operating Rept,Vol III,Jul-Dec 1991 Sample Analyses Data. ML18010A6151991-12-31031 December 1991 Annual Environ (Nonradiological) Operating Rept,1991. W/920424 Ltr ML18010A5451991-12-31031 December 1991 Semiannual Radioactive Effluent Release Rept for Jul-Dec 1991. ML18010A3731991-06-30030 June 1991 Semiannual Radioactive Effluent Release Rept,Jan-June 1991. W/910830 Ltr ML18010A6131991-06-30030 June 1991 Radiological Environ Operating Rept,Vol II,Jan-June 1991, Sample Analyses Data. ML18009A8811991-04-29029 April 1991 NPDES Noncompliance Notification:On 910310,bldg Sewage Collection Tank Pump Discovered to Be de-energized During Electrical Bus Outage.Caused by Inoperable Pump.Personnel to Refrain from Using Rest Rooms Until Power Restored ML18009A8751990-12-31031 December 1990 Annual Environ (Nonradiological) Operating Rept for 1990. W/910422 Ltr ML18009A8221990-12-31031 December 1990 Semiannual Radioactive Release Rept,Jul-Dec 1990. W/910227 Ltr 1998-12-31
[Table view] |
Text
FIRST DATA REPORT SHEARON HARRIS NUCLEAR POWER PLANT SEISMIC MONITORING PROGRAM
SUMMARY
OF DATA SEPTEMBER 30, 1977 - MARCH 31, 1979 CAROLINA POWER 6 LIGHT COMPANY APRIL 30, 1979
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INTRODUCTION On January 6, 1976, Dr. Walter Butler notified Carolina Power & Light Company (CP&L) by letter that the fault discovered at the Shearon Harris Nuclear Power Plant (SHNPP) is not a capable fault as defined in Appendix A to 10CFR Part 100. The NRC also requested that seismic monitoring be performed at the site to confirm the NRC staff conclusion that the proposed reservoirs at the site will not cause fault movement during and after filling.
In response to this, CP&L submitted a proposal on February 13, 1976, to establish a seismic monitoring network which would encompass the SHNPP plant site area. The network was installed and became operational on September 30, 1977, in order to obtain definitive baseline data prior to the filling of the reservoirs.
During this 18-month period of monitoring, no earthquakes have been detected in the plant, site area. However, the data collected has shown that the plant site area and surrounding region are extremely "noisy" from cultural sources during week day working hours (8 a.m. to 6 p.m., Monday through Friday).
We have recorded and identified 552 cultural seismic events 289 quarry explo-sions, 182 SHNPP construction related blasts, and 81 explosions from highway and pipeline construction. Since extensive effort has been required to identify these cultural events and document their arrival patterns and signatures, we will take benefit from the experience we have acquired in identifying cultural events by applying the following criteria:
Events that occur overnight and on weekends with an S-P less than five seconds and all events that occur within the network perimeter will be pursued for specific identification and included in the quarterly reports.
Events that occur outside the network perimeter during week day working hours and which display the character of a typical cultural event will only be listed in a log containing their first arrival time and remarks concerning their probable origin. These events will not be discussed in the quarterly reports.
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By so using the experience we have already gained in categorizing cultural events, our seismic analysts can apply a greater portion of their time to studying events which have a higher probability of being natural phenomena and reduce the time consumed by locating construction sites and personnel with reliable knowledge of blasting times.
1.0 Descri tion of Monitorin System The monitoring network consists of an array of four stations, each identified by a number, 1 through 4, encompassing the SHNPP site area (see Figure 1 and Table 1). Each station contains a Teledyne Geotech S-13 vertical component, short period seismometer. Station No. 4 also has two Model S-13 seismometers installed in the horizontal mode one aligned north-south and the other east-west. Data from Station Nos. 1 through 3 is transmitted via UHF radio to the SHNPP meteorological tower. Data from Station No. 4 is transmitted to the meteorological tower via commercial telephone lines. At the meteorological tower, data from all stations is multiplexed and trans-mitted by telephone lines to a central recording facility located in the Center Plaza Building in Raleigh, North Carolina. The data is recorded on 16mm microfilm by a Teledyne Geotech RF 400 Develocorder on a 24-hour-per-day, 7-day-per-week basis with only brief interruptions for routine periodic maintenance. A single visual channel is also displayed on a Geotech Helicorder drum recorder.
Figure 2 shows the system's measured frequency response using the vertical component seismometer at Station No. 4 at its normal gain settings.
This frequency response is common for all stations when adjusted for magnifi-cation variations imposed by the local background noise conditions at each station. Figure 1 shows the operating magnification at 1 Hz for each station, including the two horizontal components-of Station No. 4. It should also be pointed out that each component of the network is dually recorded at low ampli-fication for obtaining good records of unusually strong signals.
2.0 Unconfirmed Events The Company's seismic analyst views the film reel for each day and logs the time, date, reel number, and suspected source for every detected
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event with an S-P time of less than five seconds. Periodically, he calls all the known source locations and obtains a list of dates and times for their blasting. He then correlates the dates and times of detected events with reported explosive blasts in order to confirm that each recorded event is actually an explosion and not a natural seismic event.
Some cultural sources that are responsible for confirmed explosions that have been recorded are six local rock quarries, three excavation sites at the Shearon Harris Nuclear Power Plant, seven construction locations by the North Carolina Department of Transportation, and several locations along a new gasoline pipeline construction corridor.
Experience has shown that some quarries and construction companies keep very poor records of their blasting activities, often either'istakenly writing down the wrong date or time for an explosion or forgetting to log it altogether. In these cases, the seismic analyst has considerable difficulty confirming an event that is suspected of being an explosion. Nevertheless, out of more than 594 recorded explosions, only 42 events remain unconfirmed.
This number of unconfirmed events is not unexpected in a culturally active area.
All of these 42 events occurred outside the perimeter of the network; 36 are located along a four-lane highway under construction about 30 kilometers from the plant site, and 5 of these events are located along the construction route of a petroleum pipeline. In addition, all of the events exhibit the following characteristics of cultural origin:
All occur only during working hours.
All occur from Monday through Saturday, never on Sundays or- holidays.
All display signal characteristics similar to confirmed cultural events.
Since all events which occurred within the plant site area (network perimeter) have been identified as construction explosions, their arrival times are not listed and there are no epicenters or magnitudes to report.
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3.0 Detection Threshold The detection threshold in terms of ground motion amplitude that can be detected above the natural background noise has been determined at each seis-mometer station employing two methods. The first method involves measuring the normal background noise level and assuming a minimum signal to noise ratio of 2.0 is required for event detection. A minimum signal amplitude of 15 milli-microns zero to peak is required for detection at the quietest station (Station No. 2), and an amplitude of 48 millimicrons zero to peak at the noisiest site (Station No. 3) during nighttime hours. The detection threshold would be sig-nificantly higher during weekday working hours. lf it is valid to use Nuttli's magnitude formula for Lg at very short distances, then the detection threshold at 1 Hz using the minimum detection amplitude is calculated to be Mb = .8 at Station No. 2 and Mb = .3 at Station No. 3.
The second method of threshold determination involves the extrapolation of regional events to local distances. To the extent that it is valid to extrapo-late measured amplitudes of regional events to infer signal levels at local dis-tances using Nuttli's formula for Lg, we estimate a detection threshold for the monitoring network to be on the order of Mb = .5 to Mb ~ -1.0 for signals at 1 Hz.
4.0 Conclusions A seismic monitoring network has been installed which encompasses the Shearon Harris Nuclear Power Plant site. The network has operated continually for 18 months with a detection threshold capable of detecting earthquakes with magnitudes less than Mb ~ 0. Hundreds of cultural events originating from quarries and highway and pipeline construction have been identified. However, no earthquakes have been detected in the plant site area.
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SHNPP Seismic Network Station Locations Elevation Site Ft. M. Latitude ~Lon itude 282 86.0 35 37 '5'IN 78'58'49"W 35.63N 78.98W 245 74.7 35'33'17"N 78'59'23"W 35.55N 78.99W 310 94 ' 35o35 36 78'54 '6 "W 35.59N 78.90W 305 93.0 35 39'57"N 78'54'16"W 35.67N 78.90W
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