Wppss Nuc Proj Nos 3 & 5 Groundwater Drainage Sys.Analysis of Sys Performance & Data to Date.Suppl#3. Incl Observation of Piezometer Recordings Rainfall Data,Wall Seepage & Gwds Discharges.Incl Oversize DrawingsML19296A091 |
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12/01/1978 |
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WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
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ML19296A090 |
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NUDOCS 7812290151 |
Download: ML19296A091 (9) |
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Category:GENERAL EXTERNAL TECHNICAL REPORTS
MONTHYEARML17286B2761991-07-31031 July 1991 Rev 0 to Washington Nuclear Plant 3 Seismic Design Basis Model Validation,Soil Variation Studies. ML17286B2681991-05-0707 May 1991 Justification for Revised Tornado Design Criteria. ML20147D3921988-02-29029 February 1988 Seismic Hazards Assessment for Washington Nuclear Plant-3, Satsop,Wa Contract C-20453, Final Rept ML20211A8421986-09-0808 September 1986 Final Rept of Earthwork Module C3-01 of Facility Const Assurance Program of Facility Readiness Review Program ML20203E6321986-06-30030 June 1986 Validation of Ebasco Foundation Spring Modeling for Elastic Half-Space Seismic Model ML20132H0331985-07-31031 July 1985 Rev 1 to Evaluation of Itt/Grinnel Figure 215 Stiff Clamp Application on Safety-Related Piping Sys ML20129A0631985-02-20020 February 1985 Rev 2 to Preservation of Assets Preventative Program ML20090C1221984-06-30030 June 1984 Seismic Dynamic Analysis Comparison of Finite Boundaries Approach & Half-Space Approach ML20105C7121984-01-20020 January 1984 Northwest Us Subduction Zone Seismic Risk Assessment, Proposal to Research Program ML17277B2961983-11-30030 November 1983 Rept to Governor J Spellman of State of Wa & Governor V Atiyeh of State of Or. ML20076C2801983-08-0404 August 1983 Mgt Plan for Extended Const Delay of WNP-3,Executive Summary (Level I & Level II) ML20098C8831983-05-27027 May 1983 Implications of WPPSS Problems on Investor Owned Utils in Pacific Northwest ML20063C0431982-08-20020 August 1982 Info for Antitrust Review of OL Application for WPPSS Nuclear Project 3 ML20053D4291982-05-25025 May 1982 Info for Antitrust Review of OL Application for Wppss 3. ML20052E1911982-02-28028 February 1982 Termination Program Directors Monthly Repts for Feb & Mar 1982 ML20040A3441981-10-14014 October 1981 Mgt Plan for Extended Const Delay. ML20040D5731981-03-26026 March 1981 Alternative Evaluations WNP-4/5. ML19312D7991980-01-31031 January 1980 Groundwater Drainage Sys:Analysis of Sys Performance. Oversize Drawings Encl ML20079E0851980-01-30030 January 1980 Level 1 Mgt Info Rept. Related Info Encl ML19296A0911978-12-0101 December 1978 Wppss Nuc Proj Nos 3 & 5 Groundwater Drainage Sys.Analysis of Sys Performance & Data to Date.Suppl#3. Incl Observation of Piezometer Recordings Rainfall Data,Wall Seepage & Gwds Discharges.Incl Oversize Drawings ML20079E0921978-04-30030 April 1978 Project Status Rept for WNP-1,2,3,4 & 5 ML20100M4121977-09-30030 September 1977 Bidding Documents & Plans & Specs:Spec 3240-18,HVAC Packaged Air Cleaning Units. Records of 820601,0803, & 17,0902 & 27 Telcons Encl 1991-07-31
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20202C8081999-01-22022 January 1999 Safety Evaluation Supporting Order Terminating Construction Permit CPPR-154 ML17292B4791998-12-31031 December 1998 Washington Public Power Supply Sys 1998 Annual Rept. with 981215 Ltr ML17292B2121997-12-31031 December 1997 Washington Public Power Supply Sys Annual Rept for 1997. W/980108 Ltr ML17292A6361996-12-31031 December 1996 Washington Public Power Supply Sys Annual Rept for 1996. W/961212 Ltr ML17291B1501995-12-31031 December 1995 Washington Public Power Supply Sys Annual Rept 1995. W/ 951201 Ltr ML17291A6761994-12-31031 December 1994 Washington Public Power Supply Sys 1994 Annual Rept. W/ 950302 Ltr ML17290A9581993-12-31031 December 1993 Washington Public Power Supply Sys Annual Rept,1993. W/940209 Ltr ML17289B1231992-12-31031 December 1992 Washington Public Power Supply Sys 1992 Annual Rept. W/930119 Ltr ML17289A2761991-12-31031 December 1991 Washington Public Power Supply Sys 1991 Annual Rept. W/ 920128 Ltr ML17286B2761991-07-31031 July 1991 Rev 0 to Washington Nuclear Plant 3 Seismic Design Basis Model Validation,Soil Variation Studies. ML20079B8591991-06-10010 June 1991 Interim Deviation/Noncompliance Rept 067 Re dry-type Insulator Cracking in Transformer Supplied by Westinghouse.Initially Reported on 910513.Util Notified Vendor on 910430 That Problem Affects Class 1E Transformer ML17286B2681991-05-0707 May 1991 Justification for Revised Tornado Design Criteria. ML17286A5541990-12-31031 December 1990 WPPSS,1990 Annual Financial Rept. W/910115 Ltr ML17285A9891989-12-31031 December 1989 WPPSS,1989 Annual Rept. W/900129 Ltr ML20245B8701989-04-21021 April 1989 Deficiency & Part 21 Rept Re Degradation of Nonmetallic Components & Sludge Formation in Lubricating Oil.Initially Reported on 890327.Degradation of Nonmetallic Parts & Fouled Bearings Evaluated ML20154D3231988-05-16016 May 1988 Safety Evaluation Supporting Util 841102 & 860310 Requests for Extension of Plant Const Completion Date from 850101 to 990701 ML20147D3921988-02-29029 February 1988 Seismic Hazards Assessment for Washington Nuclear Plant-3, Satsop,Wa Contract C-20453, Final Rept ML17279A7641987-12-31031 December 1987 WPPSS,1987 Annual Rept. W/880108 Ltr ML20236P0061987-11-13013 November 1987 Final Part 21 & Deficiency Rept Re Failure of LPSI Pump When Energized.Initially Reported on 840523.Results of C-E Analytical & Test Program Showed That Excessive Shaft Deflection Eliminated by Use of Larger Diameter Motor Shaft ML20215C3061987-06-11011 June 1987 Safety Evaluation Supporting Application of Modified Itt/ Grinnell Stiff Clamps for Use in safety-related Piping Sys ML20214M6471987-05-27027 May 1987 Final Deficiency Rept NY-QA-8 Re Atwood & Morrill Natural Frequency ASME III Active Valves,Identified During Ebasco Engineering Review.Initially Reported on 870515.Valves Will Be Reanalyzed & Modified.Not Reportable Per 10CFR50.55(e) ML20214E4681987-05-15015 May 1987 Deficiency Rept Re Natural Frequency of ASME III Active Valves.Initially Reported on 870413.Interim/final Rept Will Be Submitted by 870527 ML17278B1731986-12-31031 December 1986 Wppss Annual Rept 1986. ML20207F1031986-12-18018 December 1986 Final Deficiency Rept Re Four Elgar Corp Static Uninterruptible Power Supply Units That Could Potentially Result in Failure of Class 1E 120-volt Vital Ac Bus. Condition Not Reportable Per 10CFR50.55(e) ML20214W7711986-11-26026 November 1986 Interim Deficiency Rept Re Uninterruptible Power Supply Assembly Deficiencies.Initially Reported on 860708. Final Rept Will Be Provided by 870116 ML20215G5351986-10-10010 October 1986 Part 21 Rept Re Vendor Tests of air-operated Diaphragm Valves Revealing Natural Frequencies Less than Required Values of 33 Hz.Initially Reported on 841227.No Adverse Effects Noted During Testing ML20215G6801986-10-10010 October 1986 Part 21 Rept Re Vendor Tests of air-operated Diaphragm Valves Revealing Natural Frequencies Less than Required Values of 33 Hz.Initially Reported on 841227.No Adverse Effects Noted During Testing ML20211A8421986-09-0808 September 1986 Final Rept of Earthwork Module C3-01 of Facility Const Assurance Program of Facility Readiness Review Program ML20212N1371986-08-25025 August 1986 Part 21 Rept Re Potentially Defective Operation of Synchro-Start Products,Inc Synchronizing Speed Switches Used in Auxiliary Generating Equipment.Initally Reported on 860820.Next Rept Will Be Submitted by 860926 ML20205G0201986-08-0808 August 1986 Interim Deficiency Rept 64 Re Uninterruptible Power Supply Assembly Defects.Initially Reported on 860708.Cracked or Stressed Fuse Blocks Will Be Replaced by Nov 1986.Final Rept Anticipated by 861201 ML20203E6321986-06-30030 June 1986 Validation of Ebasco Foundation Spring Modeling for Elastic Half-Space Seismic Model ML20198N5431986-05-31031 May 1986 Addendum to CEN-315 Summary of Diversity Between Reactor Trip Sys & Auxiliary Feedwater Actuation Sys for C-E Plants ML20202H2271986-03-26026 March 1986 Part 21 & Final Deficiency Rept D/N 62 Re Potential Overspeed Trip in Diesel Generators Mfg by Colt Industries. Initially Reported on 860224.Vendor Forwarded Proposed Mods Whereby Air Will Be Positively Vented After Engine Started ML20140A7621986-02-28028 February 1986 Informs of Plans for Implementing Severe Accident Policy Statement & Regulatory Use of New source-term Info ML20151Y8141986-02-0404 February 1986 Part 21 Rept Re Colt-Pielstick Engine Tripping Out on High Speed When Started for Test Purposes at Seabrook.Caused by Source of Air Pressure Staying On.Engines Will Be Modified to Positively Vent Air from Rack Boost Cylinder ML17278A6141985-12-31031 December 1985 Wppss 1985 Annual Rept. W/860225 Ltr ML20137J4601985-12-27027 December 1985 Interim Deficiency Rept Re Rejectable Suction Nozzle Weld Defect on Ingersoll-Rand HPSI Pump.Initially Reported on 851127.C-E Performing Technical Review of Defect.Final Rept Will Be Submitted Upon Receipt of C-E Review Results ML20138D7281985-11-30030 November 1985 Draft SER Re Status of Staff Review of FSAR & Associated Submittals Until Const Delay Announced in 1983 ML20133E1111985-09-27027 September 1985 Final Part 21 & Deficiency Rept D/N 59 Re Possible Fractured or Cracked Welds on Louis Allis Emergency Standby Generators.Initially Reported on 850624.Item Not Reportable Per 10CFR50.55(e) ML20209H8381985-09-0404 September 1985 Final Part 21 & Deficiency Rept 58 Re Titus Products Tension Wires.Initially Reported on 850311.Tension Wires Replaced & Air push-on Locknuts Installed to Secure Wires to Shafts of Air Deflection Blades ML20132H0331985-07-31031 July 1985 Rev 1 to Evaluation of Itt/Grinnel Figure 215 Stiff Clamp Application on Safety-Related Piping Sys ML20133P1611985-07-24024 July 1985 Interim Part 21 & Deficiency Rept D/N 59 Re Cracked Welds on Diesel Generator Air Deflectors Supplied by Louis-Allis Co. Initially Reported on 850624.Corrective Actions Not Received from Vendor.Next Rept Expected by 850927 ML20128K1911985-07-0101 July 1985 Deficiency Rept D/N 52 Re LPSI Pump Failures.Pump Evaluation Necessary for Final Rept Not Yet Received.Final Rept to Be Provided as Soon as Info Received ML20115J9201985-04-0101 April 1985 Final Deficiency Rept Re Brown Boveri Voltage Balance Relays W/Excessive Operating Time.Initially Reported on 850227. Relays Removed from Control Panels & Returned to Vendor for Replacements.Item Not Reportable Per 10CFR50.55(e) ML20115D0491985-03-29029 March 1985 Interim Deficiency Rept (D/N 58) Re Titus Model 272 Grille Tension Wire Failing to Remain in Place.Initially Reported on 850311.Existing Tension Wires Will Be Replaced ML20112E6631985-03-0707 March 1985 Interim Deficiency Rept Re Failure of Borg-Warner 2-inch HPSI Header Isolation Valves.Initially Reported on 850204. Opening Torque Switch Light Bypassed & Valve Yoke Tack Welded to Valve Body ML20129A0631985-02-20020 February 1985 Rev 2 to Preservation of Assets Preventative Program ML17277B6301984-12-31031 December 1984 1984 Annual Rept. W/850222 Ltr ML20113A5381984-12-27027 December 1984 Final Part 21 & Deficiency Rept Re Damaged Wires on Westinghouse Ds/Dsl Circuit Breakers.Initially Reported on 841012.Damaged Wires Will Be Replaced & Addl Wire Ties Installed ML20101B1571984-12-0303 December 1984 Corrected Final Deficiency Rept (D/N 55) Re Foxboro N-2AC Module Fuse Pin Damage.Fabrication Dates for Defective Modules Should Be May 1981 - Jul 1982 1999-01-22
[Table view] |
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WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECTS NOS. 365 GROUNDWATER DRAINAGE SYSTEM ANALYSIS OF SYSTEM PERFORAMANCE AND DATA TO DATE (SUPPLEMENT No. 3) 7 81 e 2 9 o 15('
T1 EBASCO SERVICES INCORPORATED DECEFGER 1, 1970
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I 1.
I. SYNOPSIS The WNP 3 and 5 projects have a permanent groundwater drainage system (GWDS), which performs solely by gravity drainage, placed around the reactor auxiliary buildings. This system con-sists of vertical half-round drain pipes that drain the rock and discharge to a horizontal header on the periphery of the mat. The horizontal header collects water and conducts it to a tunnel which then drains to a small creek south of the plant island. Calculations have been made, and tests made te develop the parameters for these calculations, in determining the expected performance of the groundwater drainage system by predicting the groundwater drawdown curve surrounding the buildings.
Installed piezometers are being monitored to determine the actual performance of the groundwater drainage system.
Analysis to date supports the original design parameters used in the drawdown calculations Addi- .
tional piezometers in the northwest and eastern areas of the WNP-3 exca-vation continue to indicate the presence of perched water tables in these areas.
The innta11ation of additional piezometers around the WNP-5 excavation should provide further information regarding the presence of perched water tables there.
II. DESIGN PARAMETERS All design parameters for the groundwater drainage system were those idertified in PSAR Section 3.4.5. Applicable portions of the PSAR and the expected results of the ef fect of the groundwater drawdown in the area of the reactor auxiliary buildings are presented in the report dated March 3, 1978.
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III. INSTRUMENTATION IN PuACE Figure 1 shows the location of existing open hole piezameters around the WNP-3 excavation. Of these, sixteen are the original continuously slotted inclinometer casings which were installed 20 and 50 feet away from the excavation in accordance with Ebasco Specifica-tion WPPS-3240.406. Following the discovery of several areas of high
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ground water, twenty-one additional open hole piezometers with varying slot depth locations were installed approximately 9 feet from the ex-cavation.
Figure 2 shows the location of the original sixteen continuously slotted inclinometer casings installed 20 and 50 feet away from the WNP-5 excavation.
IV. ADDITIONAL PIEZOMETER INSTALLATIONS Sixteen additional piezameters will be located nine feet from the west, north and east faces of the WNP-5 excavation. These piezo-meters will be sealed at various specified elevations. This will permit monito 8.ng of local zones of perched water believed to exist around the WNP-5 excavation. Information obtained from these additional piezometers may be available for the next report.
V. DATA COLLECTED TO DATE Figures 1 and 2 show the groundwater data collected to date for WNP-3 and -5 respectively. In addition, the corresponding depth of exca-vation and precipitation data are included. Figure 1 also includes groundwater information for the twenty-one additional piezometers installed
3.
around the WNP-3 excavation.
Groundwater data is collected weekly and submitted periodically by formal report. Unusual occurrances are verbally reported to respon-sible personnel at the site by the instrumentation subcontractor and appropriate action is taken.
VI. GROUNDWATER FLOW MEASUREMENTS Until the WNP-3 and -5 excavation walls are sealed by concrete place-ments and all groundwater infiltration is routed through the GWDS, accurate measurement of total flow is not possible. Based on observatiens during the report period, the total groundwater flows are estimated at 3 - 7 gpm and 7 - 12 gpm from the WNP-3 and -5 excavations, respectively.
VII. COMMENTARY Excavation for the site grading has brought the plant grade down to a planned final elevation of 390 feet. This has eliminated the effect of groundwater stored in the high areas that had existed to the east and west of the Reactor Auxiliary Building excavations. Reactor Auxiliary Building excavations to elevation 325 feet were completed on riarch 19 and Septem-ber 6, 1978 for Units 3 and 5, respectively.
In areas of least drawdown, local perched water conditions are indicated by water level measurements on the additional piezometers adjacent to WNP-3 and by observation of wall seepage for WNP-5. The sixteen addi-tional piezometers to be installed around the WNP-5 excavation will permit water level measurements there.
4.
Recorded values from approximately seven of the originally installed 16 piezometers around WNP-3 excavation fluctuated considerably with rainfall during the report period. Efforts are being made to extend casings and provide improved seals to reduce direct surface inflow.
The 21 additional piezometers placed adjacent to WNP-3 were installed with grout seals which prevent inflow of surface water.
Groundwater levels obtained in these installations remained essentially stable or declined slightly over the report period. The lack of effect on these piezometer levels and the existence of relatively impermeable layers in these areas of the excavation continue to indicate perched water tables in the northwest and eastern areas. The water perched on these relatively impermeable layers effects the piezometer readings by causing the piezometer to read the perched water table and not the underlying water table. Continued monitoring through the winter wet season should define any recharge effect in these areas.
Groundwater levels surrounding the WNP-5 excavation indicate the existence of perched water in the west, north and east areas. Installation of 16 additional piezometers should provi.de further definition of the perched water conditions in these areas.
VIII. CONCLUSION TO DATE The validity of the GWDS design is apparent, recognizing that the piezometers located in the northwest and eastern areas of the WNP-3 excavation are measuring the highest of several localized perched water
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tables and not the single underlying water table. The piezometers located in areas without apparent perched water zones are in close agreement with the predicted drawdown. Data obtained from all piezo-meters during the winter wet seasen should provide further definition of the perched water zones and allow a comparison of actual with pre-dicted drawdown in each zone.
As indicated in Section VII, groundwater levels surrounding WNP-5 excavation will be more closely examined in the next report.
Observation of piezometer recordings, rainfall data, wall seepage, and CWDS discharges indicates that the system will function as recuired.
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