ML20081D812
| ML20081D812 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 10/28/1983 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | John Miller Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737 LIC-83-276, NUDOCS 8311010351 | |
| Download: ML20081D812 (4) | |
Text
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l Omaha Public Power District 1623 Harney Omaha, Nebraska 68102 402/536 4000 October 28, 1983 LIC-83-276 Mr. James R.
Miller, Chief U.
S.
Nuclear Regulatory Commission Of fice of Nuclear Reactor Regulation Division of Licensing Operating Reactors Branch No. 3 Washington, D.C.
20555
Reference:
Docket No. 50-285
Dear Mr. Miller:
Safety Parameter Display System Analysis Pursuant to the requirements of NUREG-0737, supplement 1, Item 4, the Omaha Public Power District hereby submits the safety analysis for the selection of the safety parameter display system parameters.
Since ely,
} t l,I hvo W.
C. Jones Divisi'o Manager Produc ion Operations WCJ/KJM:jmm Attachment l
cc:
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D.C.
20036 Mr.
E.
G. Tourigny, Project Manager Mr.
L.
A.
Yandell, Senior Resident Inspector i
8311010351 831028
/
PDR ADOCK 05000285 r rOO3 F
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45 5124 Employment with Equal Opportunity Male / Female
.... - ~ - - -.. -. - -.,,..
Attachment 0
1 SPDS PARAMETER SELECTION SAFETY ANALYSIS This safety analysis describes the basis on which the parameters monitored by the Fort Calhoun SPDS are sufficient to assess the safety status of each safety function for a wide range of events, including severe acci-dents. The safety functions and the parameters to be monitored to assess the criteria of each safety function are identified in the CE Emergency Procedure Guidelines (EPG). The CE EPG's also contain guidance for safety J
function status checks. The philosophy behind selecting the SPDS para-meters is that the SPDS at Fort Calhoun is a computerized method of assessing the safety functions identified in the Emergency Operating Procedures (EOP) which will be based on the CE EPG's. Because the E0P's have not yet been prepared for Fort Calhoun Station, this analysis is based on the CE EPG's. The analysis identifies the safety function, the parameters identified by the EPG's, the corresponding variables monitored by the SPDS, and the adequacy of the SPDS variables.
1.
Safety Function: Reactivity Control EPG Parameters:
CEA Bottom Light Reactor Power Negative Startup Rate Boron Concentration SPDS Variables:
CEA Full In Position Wide Range Log Power Startup Rate Boronometer Baron Concentration Adequacy of SPDS All EPG parameters are monitored Variables:
by the SPDS 2.
Safety Function:
RCS Inventory Control EPG Parameters:
Pressurizer Level Subcooling ECCS delivery.
SPDS Variables:
Pressurizer Level CET Subcooling Minimum RCS RTD subcooling i
RVLMS will be added when the system is installed Adequacy of SPDS All EPG parameters are monitored by Variables the SPDS i
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-1
3.
Safety Function: RCS Pressure Control EPG Parameters:
RCS Pressure Subcooling ECCS Delivery SPDS Variables:
Pressurizer Pressure CET Subcooling Minimum RCS RTD Subcooling HPSI Flow LPSI Flow Adequacy of SPDS All EPG parameters are monitored Variables:
by the SPDS 4.
Safety Function: RCS and Core Heat Removal EPG Parameters:
Steam Generator Level Feedwater Flow TH Temperature Tc Temperature oT Temperature.
TAVE Temperature RCS Subcooling ECCS Delivery CET temperature RCS Pressure SPDS Variables:
Wide Range Level for Both Steam Generators Feedwater Flow to Both Steam Generators RTD's on Both Hot Legs RTD's on all Four Cold Legs oT Between Hot and Cold Leg TAVE CET Subcooling Minimum RCS RTD Subcooling HPSI Flow LPSI Flow Maximum CET Temperature All CET Temperatures Pressurizer Pressure Adequacy of SPDS All EPG parameters are monitored Variables:
by the SPDS 2
4
5.
Safety Function: Containment Isolation EPG Parameters:
Radiation Monitors Containment Pressure Containment Isolation Valve Status SPDS Variables:
Containment Monitors Gaseous Effluent Monitors Condensor Off-Gas Monitor Plant Liquid Effluent Monitor Area Monitors Wide Range Containment Pressure Status of all Containment Isolation Valves Adequacy of SPDS All EPG parameters are monitored Variables:
by the SPDS 6.
Safety Function: Containment Temperature and Pressure EPG Parameters:
Containment Pressure Containment Temperature Containment Spray Flow SPDS Variables:
Containment Pressure Containment Temperature Containment Spray Flow Adequacy of SPDS All EPG parameters are monitored Variables:
by the SPDS 7.
Safety Function: Containment Combustible Gas Control EPG Para...eter:
Containment H2 Concentration SPDS Variable:
Containment H2 Concentration Adequacy of SPDS The EPG parameter is monitored Variable:
by the SPDS Based on this survey, the District concludes that all parameters iden-tified in the CE EPG safety function status check matrix are monitored by the SPDS. The EPG safety function status check was developed to assure safety functions were being maintained for a wide range of events in-cluding severe accidents. The CE EPG's were approved for plant specific implementation in Generic Letter 83-23. Therefore, the District concludes that the parameters monitored by the SPDS are sufficient to assess the status of the safety functions. Further, the District concludes that the implementation of these parameters on the SPDS does not constitute an unreviewed safety question.
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