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Category:TECHNICAL SPECIFICATIONS & TEST REPORTS
MONTHYEARML20211A9881999-08-18018 August 1999 Rev 5 to DPC Nuclear Security Training & Qualification Plan ML20204B4141999-03-27027 March 1999 Revised Oconee Nuclear Station Selected Licensee Commitments, List of Effective Pages ML20155C6391998-10-26026 October 1998 Proposed Tech Specs Tables 4.1-1 & 4.1-2,revised Surveillance Frequency of Refueling Outage to 18 Months ML20154L7191998-10-0505 October 1998 Rev 8 to DPC Nuclear Security & Contingency Plan, for Oconee,Mcguire & Catawba Nuclear Stations ML20154C1021998-09-30030 September 1998 Proposed Tech Specs Changing UFSAR by Increasing Max Rod Internal Pressure in Spent Fuel Pool from 1,200 to 1,300 Psig ML20236V9611998-07-27027 July 1998 Corrected TS Bases Pages 3.5-30b of 961211 & 3.16-2 of 970205,correcting Amend Numbers ML20236T5171998-07-20020 July 1998 Proposed Tech Specs Re one-time Extension to Functional Test Frequencies for Hydraulic & Mechanical Snubbers ML20236R1901998-07-16016 July 1998 Proposed Tech Specs Extending TS Surveillances TS 4.20.2(a), Table 4.20-1,items 1,2 & 4,TS 4.1-1,Table 4.1-1,items 8,9,10 & 11 & TS 4.5.1.2.1,item b(1) ML20217F2841998-04-20020 April 1998 Rev 7 to DPC Nuclear Security & Contingency Plan, for Oconee,Mcguire & Catawba Nuclear Stations ML20141F1521997-06-25025 June 1997 Rev 4 to Nuclear Security Training & Qualification Plan ML16141B0771996-11-18018 November 1996 Errata to TS 3.7,which Removes Criteria for Battery & Battery Charger Specific Svc Tests ML20134K5401996-10-31031 October 1996 Rev 6 to Chemistry Manual 5.1, Emergency Response Guidelines ML20117J0181996-08-15015 August 1996 Revised Chapter 16 of Oconee Selected Licensee Commitments Manual ML20095H1291995-12-0505 December 1995 Rev to ONS Selected Licensee Commitments (SLC) Manual, Revising SLC 16.6.1, Containment Leakage Tests to Reflect Current Plant Configuration & Update Testing Info ML20091P2461995-08-21021 August 1995 Rev to ONS Selected Licensee Commitments Manual ML16141A9291995-06-29029 June 1995 Proposed Tech Specs Re Mgt Positions Authorized to Approve Such Items as Procedures & Procedure Changes,Station Mods, TS Amends & Reportable Events ML16141A8581995-01-0909 January 1995 Revs to Oconee Selected Licensee Commitments Manual ML16141A8111994-04-20020 April 1994 Proposed Tech Spec Table 4.1-2, Min Equipment Test Frequency ML16141A7981994-04-12012 April 1994 Proposed Tech Specs Re Technical Review & Control Activities ML15261A4281994-02-24024 February 1994 Proposed TS 4.6, Emergency Power Periodic Testing ML15224A3521993-10-26026 October 1993 Safety Assurance Directive 6.1, Oconee Nuclear Site Safety Assurance Emergency Response Organization ML20044C9581993-05-0404 May 1993 Proposed TS 4.7.1, Control Rod Trip Time Test ML20045F0721993-04-0707 April 1993 Rev 9 to Corporate Process Control Program Manual ML20097D9451992-05-28028 May 1992 Rev 11 to Training & Qualification Plan ML20096C2561992-04-30030 April 1992 Public Version of Revised Crisis Mgt Implementing Procedures (Cmip),Including Rev 46 to CMIP-1,Rev 39 to CMIP-4,Rev 45 to CMIP-5,Rev 49 to CMIP-6,Rev 48 to CMIP-7,Rev 42 to CMIP-9 & Rev 3 to CMIP-15 ML20096D5451992-04-0707 April 1992 Public Version of Revised Crisis Mgt Implementing Procedures (Cmip),Including Rev 45 to CMIP-1,Rev 27 to CMIP-13 & Notification of Deletion of CMIP-8.Procedure CMIP-8 Reserved for Future Use ML16131A5241992-03-0101 March 1992 Rev 35 to ODCM Generic Section ML20092M5891992-02-0606 February 1992 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 43 to CMIP-1,Rev 43 to CMIP-5,Rev 33 to CMIP-8,Rev 25 to CMIP-13,Rev 6 to CMIP-18,Rev 4 to CMIP-22 & Rev 38 to CMIP-4 ML20094H2391992-01-0101 January 1992 Rev 33 to McGuire Nuclear Station Odcm ML20094H2511992-01-0101 January 1992 Rev 34 to Catawba Nuclear Station Odcm ML16131A5221992-01-0101 January 1992 Rev 32 to Oconee Nuclear Station Odcm ML20087F3931991-12-11011 December 1991 Public Version of Rev 13 to Crisis Mgt Implementing Procedure CMIP-11, Emergency Classification - Mcguire. W/ 920121 Release Memo ML20086K8831991-11-18018 November 1991 Public Version of Revised Crisis Mgt Implementing Procedures (Cmips),Including Rev 42 to CMIP-1,Rev 29 to CMIP-2,Rev 42 to CMIP-5,Rev 12 to CMIP-11 & Rev 37 to CMIP-21 ML20086G7711991-10-16016 October 1991 Public Version of Revs to Crisis Mgt Implementing Procedures (Cmip),Including Rev 41 to CMIP-1,rev 37 to CMIP-4,rev 41 to CMIP-5,rev 46 to CMIP-6 & CMIP-7,rev 32 to CMIP-8,rev 40 to CMIP-9,delete CMIP-12 & Rev 24 to CMIP-13 ML20082C7441991-06-11011 June 1991 Public Version of Rev 13 to Crisis Mgt Implementing Procedure CMIP-12, Classification of Emergency for Oconee Nuclear Station ML20081J9841991-06-10010 June 1991 Rev 3 to EDA-1, Procedure for Estimating Food Chain Doses Under Post-Accident Conditions ML20076A7241991-06-10010 June 1991 Public Version of Crisis Mgt Implementing Procedures, Including Rev 39 to CMIP-1,rev 28a to CMIP-2,rev 44 to CMIP-7,rev 39 to CMIP-9 & Rev 10 to CMIP-11 ML20081K0101991-06-0606 June 1991 Rev 8 to EDA-3, Offsite Dose Projections for McGuire Nuclear Station ML20072S0521991-03-15015 March 1991 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 9 to CMIP-11, Classification of Emergency for McGuire Nuclear Station & Rev 11 to CMIP-12, Classification of Emergency for Oconee Nuclear Station ML16148A9621991-02-13013 February 1991 Public Version of Rev 10 to CMIP-12, Crisis Mgt Implementing Procedure ML20066G3621991-02-0101 February 1991 Public Version of Crisis Mgt Implementing Procedures, Including Rev 28 to CMIP-2,Rev 34 to CMIP-4,Rev 38 to CMIP-5,Rev 43 to CMIP-6,Rev 42 to CMIP-7,Rev 29 to CMIP-8, Rev 37 to CMIP-9 & Rev 34 to CMIP-21 ML20082P7611991-01-0101 January 1991 Rev 30 to Odcm,Catawba Nuclear Station ML15217A1291991-01-0101 January 1991 Rev 29 to Odcm,Oconee Nuclear Station ML20072S9621991-01-0101 January 1991 Public Version of Rev 12 to Crisis Mgt Implementing Procedure CMIP-12, Classification of Emergency for Oconee Nuclear Station ML20082P7711991-01-0101 January 1991 Rev 31 to Odcm,Mcguire Nuclear Station ML20072P9621990-11-0808 November 1990 Rev 9 to Crisis Mgt Implementing Procedure CMIP-12, Classification of Emergency for Oconee Nuclear Station ML20028H2211990-10-31031 October 1990 Public Versions of Revised Crisis Mgt Implementing Procedures,Including Rev 37 to CMIP-1,Rev 27a to CMIP-2,Rev 33 to CMIP-4,Rev 37 to CMIP-5 & Rev 42 to CMIP-6 ML20059F4301990-08-22022 August 1990 Public Version of Rev 27 to Crisis Mgt Implementing Procedure CMIP-2, News Group Plan ML20063Q2721990-08-14014 August 1990 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 36 to CMIP-1,Rev 32 to CMIP-4,Rev 36 to CMIP-5,Rev 41 to CMIP-6,Rev 40 to CMIP-7,Rev 27 to CMIP-8,Rev 35 to CMIP-9 & Rev 7 to CMIP-11 ML20043F4841990-05-23023 May 1990 Public Version of Crisis Mgt Implementing Procedures, Consisting of Rev 20 to CMIP-13 & Deletion of CMIP-15 & CMIP-17 1999-08-18
[Table view] Category:TEST/INSPECTION/OPERATING PROCEDURES
MONTHYEARML20211A9881999-08-18018 August 1999 Rev 5 to DPC Nuclear Security Training & Qualification Plan ML20204B4141999-03-27027 March 1999 Revised Oconee Nuclear Station Selected Licensee Commitments, List of Effective Pages ML20154L7191998-10-0505 October 1998 Rev 8 to DPC Nuclear Security & Contingency Plan, for Oconee,Mcguire & Catawba Nuclear Stations ML20217F2841998-04-20020 April 1998 Rev 7 to DPC Nuclear Security & Contingency Plan, for Oconee,Mcguire & Catawba Nuclear Stations ML20141F1521997-06-25025 June 1997 Rev 4 to Nuclear Security Training & Qualification Plan ML20134K5401996-10-31031 October 1996 Rev 6 to Chemistry Manual 5.1, Emergency Response Guidelines ML20117J0181996-08-15015 August 1996 Revised Chapter 16 of Oconee Selected Licensee Commitments Manual ML20095H1291995-12-0505 December 1995 Rev to ONS Selected Licensee Commitments (SLC) Manual, Revising SLC 16.6.1, Containment Leakage Tests to Reflect Current Plant Configuration & Update Testing Info ML20091P2461995-08-21021 August 1995 Rev to ONS Selected Licensee Commitments Manual ML16141A8581995-01-0909 January 1995 Revs to Oconee Selected Licensee Commitments Manual ML15224A3521993-10-26026 October 1993 Safety Assurance Directive 6.1, Oconee Nuclear Site Safety Assurance Emergency Response Organization ML20045F0721993-04-0707 April 1993 Rev 9 to Corporate Process Control Program Manual ML20097D9451992-05-28028 May 1992 Rev 11 to Training & Qualification Plan ML20096C2561992-04-30030 April 1992 Public Version of Revised Crisis Mgt Implementing Procedures (Cmip),Including Rev 46 to CMIP-1,Rev 39 to CMIP-4,Rev 45 to CMIP-5,Rev 49 to CMIP-6,Rev 48 to CMIP-7,Rev 42 to CMIP-9 & Rev 3 to CMIP-15 ML20096D5451992-04-0707 April 1992 Public Version of Revised Crisis Mgt Implementing Procedures (Cmip),Including Rev 45 to CMIP-1,Rev 27 to CMIP-13 & Notification of Deletion of CMIP-8.Procedure CMIP-8 Reserved for Future Use ML16131A5241992-03-0101 March 1992 Rev 35 to ODCM Generic Section ML20092M5891992-02-0606 February 1992 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 43 to CMIP-1,Rev 43 to CMIP-5,Rev 33 to CMIP-8,Rev 25 to CMIP-13,Rev 6 to CMIP-18,Rev 4 to CMIP-22 & Rev 38 to CMIP-4 ML20094H2511992-01-0101 January 1992 Rev 34 to Catawba Nuclear Station Odcm ML16131A5221992-01-0101 January 1992 Rev 32 to Oconee Nuclear Station Odcm ML20094H2391992-01-0101 January 1992 Rev 33 to McGuire Nuclear Station Odcm ML20087F3931991-12-11011 December 1991 Public Version of Rev 13 to Crisis Mgt Implementing Procedure CMIP-11, Emergency Classification - Mcguire. W/ 920121 Release Memo ML20086K8831991-11-18018 November 1991 Public Version of Revised Crisis Mgt Implementing Procedures (Cmips),Including Rev 42 to CMIP-1,Rev 29 to CMIP-2,Rev 42 to CMIP-5,Rev 12 to CMIP-11 & Rev 37 to CMIP-21 ML20086G7711991-10-16016 October 1991 Public Version of Revs to Crisis Mgt Implementing Procedures (Cmip),Including Rev 41 to CMIP-1,rev 37 to CMIP-4,rev 41 to CMIP-5,rev 46 to CMIP-6 & CMIP-7,rev 32 to CMIP-8,rev 40 to CMIP-9,delete CMIP-12 & Rev 24 to CMIP-13 ML20082C7441991-06-11011 June 1991 Public Version of Rev 13 to Crisis Mgt Implementing Procedure CMIP-12, Classification of Emergency for Oconee Nuclear Station ML20081J9841991-06-10010 June 1991 Rev 3 to EDA-1, Procedure for Estimating Food Chain Doses Under Post-Accident Conditions ML20076A7241991-06-10010 June 1991 Public Version of Crisis Mgt Implementing Procedures, Including Rev 39 to CMIP-1,rev 28a to CMIP-2,rev 44 to CMIP-7,rev 39 to CMIP-9 & Rev 10 to CMIP-11 ML20081K0101991-06-0606 June 1991 Rev 8 to EDA-3, Offsite Dose Projections for McGuire Nuclear Station ML20072S0521991-03-15015 March 1991 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 9 to CMIP-11, Classification of Emergency for McGuire Nuclear Station & Rev 11 to CMIP-12, Classification of Emergency for Oconee Nuclear Station ML16148A9621991-02-13013 February 1991 Public Version of Rev 10 to CMIP-12, Crisis Mgt Implementing Procedure ML20066G3621991-02-0101 February 1991 Public Version of Crisis Mgt Implementing Procedures, Including Rev 28 to CMIP-2,Rev 34 to CMIP-4,Rev 38 to CMIP-5,Rev 43 to CMIP-6,Rev 42 to CMIP-7,Rev 29 to CMIP-8, Rev 37 to CMIP-9 & Rev 34 to CMIP-21 ML15217A1291991-01-0101 January 1991 Rev 29 to Odcm,Oconee Nuclear Station ML20082P7711991-01-0101 January 1991 Rev 31 to Odcm,Mcguire Nuclear Station ML20072S9621991-01-0101 January 1991 Public Version of Rev 12 to Crisis Mgt Implementing Procedure CMIP-12, Classification of Emergency for Oconee Nuclear Station ML20082P7611991-01-0101 January 1991 Rev 30 to Odcm,Catawba Nuclear Station ML20072P9621990-11-0808 November 1990 Rev 9 to Crisis Mgt Implementing Procedure CMIP-12, Classification of Emergency for Oconee Nuclear Station ML20028H2211990-10-31031 October 1990 Public Versions of Revised Crisis Mgt Implementing Procedures,Including Rev 37 to CMIP-1,Rev 27a to CMIP-2,Rev 33 to CMIP-4,Rev 37 to CMIP-5 & Rev 42 to CMIP-6 ML20059F4301990-08-22022 August 1990 Public Version of Rev 27 to Crisis Mgt Implementing Procedure CMIP-2, News Group Plan ML20063Q2721990-08-14014 August 1990 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 36 to CMIP-1,Rev 32 to CMIP-4,Rev 36 to CMIP-5,Rev 41 to CMIP-6,Rev 40 to CMIP-7,Rev 27 to CMIP-8,Rev 35 to CMIP-9 & Rev 7 to CMIP-11 ML20043F4841990-05-23023 May 1990 Public Version of Crisis Mgt Implementing Procedures, Consisting of Rev 20 to CMIP-13 & Deletion of CMIP-15 & CMIP-17 ML20043B2651990-05-0909 May 1990 Revised Crisis Mgt Implementing Procedures,Including Rev 35 to CMIP-1,Rev 26 to CMIP-2,Rev 31 to CMIP-4,Rev 35 to CMIP-5,Rev 40 to CMIP-6,Rev 39 to CMIP-7,Rev 26 to CMIP-8, Rev 33 to CMIP-9,Rev 2 to CMIP-14 & Rev 10 to CMIP-16 ML20043F4621990-04-20020 April 1990 Rev 5 to Oconee-specific Process Control Manual ML20006C0571990-01-18018 January 1990 Public Version of Rev 33 to Crisis Mgt Implementing Procedure CMIP-1, Recovery Manager & Immediate Staff & Rev 24 to CMIP-2, News Group Plan ML16152A8951990-01-0202 January 1990 Rev 33 to Public Version of Crisis Mgt Plan for Nuclear Stations ML15264A1571990-01-0202 January 1990 Revised Crisis Mgt Implementing Procedures,Including Rev 32 to CMIP-1,Rev 29 to CMIP-4,Rev 33 to CMIP-5,Rev 38 to CMIP-6,Rev 37 to CMIP-7,Rev 32 to CMIP-9,Rev 1 to CMIP-14 & Rev 30 to CMIP-21 ML20012A3791990-01-0101 January 1990 Rev 27 to, Offsite Dose Calculation Manual,Oconee Nuclear Station ML20012A3801990-01-0101 January 1990 Rev 28 to, Offsite Dose Calculation Manual,Oconee,Mcguire & Catawba Nuclear Stations ML20011D2441989-12-0101 December 1989 Crisis Mgt Implementing Procedures ML20012A3731989-11-15015 November 1989 Rev 4 to, Process Control Program Oconee Nuclear Station ML19332C8451989-11-0101 November 1989 Public Version of Revised Crisis Mgt Implementing Procedures,Including Rev 31 to CMIP-1,Rev 28 to CMIP-4,Rev 32 to CMIP-5,Rev 37 to CMIP-6,Rev 36 to CMIP-7,Rev 25 to CMIP-8,Rev 31 to CMIP-9 & Rev 19 to CMIP-13 ML19325F1931989-11-0101 November 1989 Public Version of Rev 32 to, Crisis Mgt Plan for Nuclear Stations 1999-08-18
[Table view] |
Text
Oconee Nuclear Station Selected Licensee Commitments List of Effective Pages Page Revision Date Cover Letter LOEP 1 1/9/95 LOEP 2 10/93 EP 3 11/16/94 LOEP 1/9/95 LOEP 5 1/9/95 LOEP 6 1/9/95 Tab 16.0 16.0-1 1/9/95 16.0-2 1/9/95 16.0-3 1 /95 Tab 16.1 16.1-1 Tab 16.2 16.2-1 16.2-2 16.2-3 Tab 16.3 16.3-1 2/91 Tab 16.5 16.5-1 3/91 16.5-2 2/17/94 16.5-3 2/17/94 16.5-4 2/17/94 16.5-5 2/17/94 1/9/95
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Page No.
Revision Date.
16.9-9 11/03/94 16.9-10 11/03/94 16.9-11 11/03/94 16.9-12 11/03/94 16.9-13 11/03/94 16.9-14 11/03/94 16.9-15 11/03/94 16.9-16 11/03/94 16.9-17 11/03/94 16.9-18 11/03/94 16.9-19 11/03/94 16.9-19a 11/03/94 16.9-19b 11/03/94 16.9-19c 11/03/94 16.9-19d 11/03/94 16.9-19e 11/03/94 16.9-20 10/20/94 16.9-21 10/20/94 16.9-22 10/20/94 16.9-23 10/20/94 16.9-24 10/20/94 16.9-25 10/20/94 16.9-26 10/20/94 16.9-27 10/20/94 16.9-28 10/20/94 16.9-29 1/9/95 16.9-30 1/9/95 1/9/95 Page 4
16.9 AUXILIARY SYSTEMS 16.9.7 KEOWEE LAKE LEVEL COMMITMENT Ensure the proper requirements are met for the following lake Keowee level ranges.
APPLICABILITY:
Maintain level to ensure operability of specified systems and/or components.
NOTE: An instrument error of +/- 1.15 ft has been applied to lake levels identified in this SLC. This is based on control room indicator or computer point being used to verify level. Keowee personnel may be contacted to determine absolute lake level. Levels identified as (abs)are absolute values without instrument error included.
LAKE LEVEL REQUIRED ACTION REQUIRED ACTION NOT MET A. All Lake Levels A.l Verify the A.1.1 If the EWST or availability of the HPSW-25 are unavailable EWST and HPSW-25 to and the Absolute Lake supply sealing and Level is below 798.1 lubrication to the CCW feet, then the LPSW Pump shafts.
system is inoperable.
Enter Tech. Spec. 3.0.
If Absolute Lake Level is above 798.1 feet, contact Mechanical Systems Engineering to determine if Gravity flow is available. If gravity flow is not available, enter Tech.
Spec. 3.0.
16.9-20 10/20/94
LAE LEVEL REQUIRED ACTION REQUIRED ACTION NOT MET B. Lake Level 3.1 Verify at least two B.1.1 If only one
< 801.15 ft.
sources of CCW are siphon assisted source (800.0 abs) available by siphon is available, then the flow to the CCW cross-LPSW system cannot over piping. The two withstand a single sources must come from failure. Enter a 72 different Oconee Units.
hour LCO per T.S.
To ensure the sources 3.3.7.
will siphon flow to the CCW crossover piping, the CCW intake piping must be-maintained water solid. At least 3 CCW pumps shall be running for any unit to be considered a source.
3.1.2 If no siphon assisted sources are available, then declare the LPSW system inoperable. Enter T.S.
3.0.
B.2 For any Oconee Unit B.2.1 Declare the ECCW with an RCS temperature system inoperable per k 250 0 F, verify at T.S. 3.4.5 on the least 3 CGW pumps are applicable Oconee Unit.
running on that unit to ensure the flow through the condenser portion of the ECGW (second siphon) is operable.
C. Lake level C.1 Declare the Keowee 0.1.1 Notify Compliance
< 796.65 ft.
Step-up Transformer of the need to meet the (795.5 abs)
Mulsifyre inoperable reporting requirements AND of SLC 16.9.2.
Refer to SLC 16.9.2 to establish required firewatch.
16.9-21 10/20/94
LAKE LEVEL REQUIRED ACTION REQUI RED ACTION NOT MET D. Lake level D.1 Verify at least two D.1.1 If only one
< 790.15 ft.
sources of CCW are siphon assisted source (789 abs) available by sipho is available, then the flow to the CCW LPSW system cannot crossover piping. The withstand a single two sources must come failure. Enter a 72 from different Oconee hour LCO per T.S.
Units. To ensure the 3.3.7.
sources will siphon flow to the CCW crossover piping, the CCW intake piping must be maintained water solid. For any unit to be considered a source, all 4 CCW pumps shall be running.
D.1.2 If no siphon assisted sources are available, then declare the LPSW system inoperable. Enter T.S.
3.0.
D.2 For any Oconee unit D.2.1 Declare the ECCW with an RCS temperature system operable per k 250 o F, verify all 4 T.S. 3.4.5 on the CCW pumps are running applicable Oconee unit.
on that unit to ensure the flow through the condenser portion of the ECCW (second siphon) is operable.
E. Lake level E.1 Prior to lake level E.1.1 Declare the
< 787.40 ft.
decreasing below.787.40 affected unit (786.25 abs) close valves (1) (2) unavailable as a siphon 3CCW-319 and (1) (2) assisted source. Refer 3CCW-320.
to item D, above.
F. Lake level F.1 Restore lake level F.1.1 The LPSW system
<787.15 ft.
to greater than 787.15.
cannot withstand a (786.00 abs) single failure. Enter a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> LCO per T.S.
3.3.7.
16.9-22 10/20/94
SURVEILLANCE:
Keowee Lake Level shall be monitored once per shift.
BASES:
The CCW system provides the suction source to the CCW crossover piping which supplies suction to the LPSW system. Normally this crossover header is aligned to all three Oconee Units and any operating CGW pump can provide adequate flow for the requirements of the LPSW systems for all 3 units. During certain analyzed accident conditions, a loss of power to the CCW pumps for all 3 units must be assumed. This results in a loss of forced flow to the CCW crossover header.
In the event of loss of off-site power (LOOP), the Emergency CCV (ECCW) siphon must be capable of supplying suction to the LPSW pumps to meet the requirements of Tech Spec 3.3.7. The ECCW supply to LPSW (first siphon) must be capable of withstanding a single active failure. In support of the ECCW supply to LPSW siphon, HPSW must supply seal water to the CCW pump shafts to prevent air inleakage that may defeat the siphon. The EWST through HPSW-25 provides the seal water necessary to the CCW pumps immediately following a LOOP (Refer to SLC 16.9.1 for HPSW pump requirements).
If all AC power is lost (SBO event), ECCW must be capable of supplying flow through the condensers (second siphon) for decay heat removal per Tech Spec 3.4.5. Single failure is not postulated for SBO events.
With the lake level less than 801.15 feet, siphon flow capability must be established. To ensure a siphon flowpath will be established in the event O
forced flow is stopped, at least one unit's GCW flowpath from the intake structure to the CCW crossover must be maintained water solid. Since the Continuous Vacuum Priming connections to the CCW inlet piping are normally isolated, the CCW flowpath is maintained water solid by requiring a minimum number of CCW pumps operating. Water solid is defined as sufficient positive pressure to prevent gases from coming out of solution and sufficient flow to ensure gases that may come out of solution will be swept away and not accumulate to the point of blocking siphon flow. A CCW flowpath is defined as two 8 ft. CCW pump discharge valves open to a common 11 ft. GCW inlet header.
The minimum number of CCW pumps necessary to ensure siphon flow capability varies with lake level. With lake level between 801.15 and 790.15, the CCW flowpath is maintained water solid by operating at least three COW pumps on each Oconee unit being used as a siphon source. In the event lake level falls below 790.15, the CCW flowpath is maintained water solid by operating all four CCW pumps on that Oconee unit.
With lake level greater than 799.25 feet (798.1 abs), it May be possible to provide adequate suction pressure to the LPSW pumps due to gravity flow without dependance upon siphon flow. For simplicity, information is not included to determine if gravity flow is possible. Mechanical Systems Engineering should be contacted to determine whether or not gravity flow is possible if an LCO is entered and lake level is greater than 799.25.
Due to a potential single failure that could close all the CCW pump discharge valves associated with one Oconee unit, siphon sources from at least two 16.9-23 10/20/94
Oconee unit's CCW intakes must be available to supply the CCW crossover header. A 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> LCO must be entered per Tech Spec 3.3.7 if only one siphon source is available.
The minimum number of running CGW pumps required to provide siphon flow to the CCW crossover piping, as described above, will also ensure operability of ECCW siphon flow through the condenser, also known as the "second siphon". If any Oconee unit fails to maintain the minimum number of CCW pumps running when the RCS is heated above 250*F as described in items A and C, then the ECGW system for that unit must be declared inoperable per Tech Spec 3.4.5.
Should lake level fall below 796.65, the Keowee main Step-up Transformer Mulsifyre system may not provide the required flowrates. For this reason, the Mulsifyre should be declared inoperable and the appropriate compensatory actions taken.
Should lake level fall below 787.40, a postulated pipe break (due to a seismic event) downstream of valves (1)(2)3CCW-319 and (1)(2)3CCW-320 could cause a loss of the siphon supply to the CCW crossover for any unit which has these valves open. For this reason, it should be verified that the two units being utilized for meeting the requirements of A.1 or C.1 have their respective Radwaste supply valves closed prior to lake level decreasing below 787.40.
With lake level below 787.15, the LPSW pumps could experience inadequate NPSH with siphon flow from the CCW intake. Calculations show this could occur if a single failure causes the minimum number of LPSW pumps (one for Unit 3 or two for the shared Unit 1 and 2 systems) to be available during a design basis event. Therefore, the LPSW system must be considered unable to withstand a single failure for lake level below 787.15 and a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> LCO must be entered per T.S. 3.3.7. Action should be initiated to raise and maintain Keowee lake level >787.15.
The level of 787.15 for LPSW system operability is based upon calculations and testing performed to determine the level required to ensure adequate NPSH to the LPSW pumps during worst case accident configurations.
This testing in conjunction with flow model calculations determined that this lake level would be sufficient to maintain the LPSW systems operable, provided additional steps as identified by procedural guidance to the operators were utilized.
16.9-24 10/20/94
REFERENCES:
- 1.
PIR 0-092-0535
- 2.
Calculation OSC-5018, Rev. 1
- 3.
Units 1 and 2 LPSW System Flow Test, TT/l/A/0251/21
- 4.
CCW Design Basis Document
- 5.
Calculation OSC-2895, Rev. 3
- 6.
Calculation OSC-5325
- 7.
PIR-4-090-0109
- 8.
LER 269/93-04, Rev. 0 and Rev. 1
- 9.
Calculation OSC-5304
- 10.
Calculation OSC-5022, Rev. 1
- 11.
Calculation OSC-2280, Rev. 5
- 12.
Calculation OSC-5349, Rev.1
- 13.
Calculation OSC-5670, Rev. 1
- 14.
Calculation OSC-5461, Rev. 2 STATION MANAGER APPROVAL__
DATE /
?7-16.9-25 10/20/94