L-82-564, Forwards Final Response to Requirements of NUREG-0737,Item II.D.1 Re PWR Safety & Relief Valve Test Program.Conclusion & Previous Submittals Support Continued Safe Operation & NUREG Requirement
| ML17213A931 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 12/30/1982 |
| From: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.D.1, TASK-TM L-82-564, NUDOCS 8301030190 | |
| Download: ML17213A931 (7) | |
Text
REGULA' Y INFORMATION DISTRIBUTIOYSTEM (RIDE)
ACCESSION NBR o 8301030190 DOC ~ DATE: 82/12/30 NOTARIZED; NO FACIL:50 335 St ~ Lucie Planti Uni t 1<
Fl or ida Power tl Light Co ~
AUTH~ NAME AUTHOR AFFILIATION U"RIGiRNE ~
Florida Power 8 Light Co, RECIP ~ NAME RECIPIENT AFFILIATION EISENHUTiD.G.
Division of Licensing DOCKET 05000335 SUBJECTS Forwards final response to requirements of NUREG 0737i Item II.D,1 of re PWH safety
& relief valve test program, Conclusion 8 previous submittals support continued safe operation 8,
NUREG requirement
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TMI Action Plan Rgmt NUREG"0737 8
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FLORIDAPOWER & LIGHTCOMPANY December 30, 1982 L-82-564 Office of Nuclear Reactor Regulation Attention:
Mr. Darrell G. Eisenhut, Director Division of Licensing U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555
Dear Mr. Ei senhut:
Re:
St. Luci e Unit 1
Docket No. 50-335 Post-TMI Requi rements PWR Relief and Safety Valve Testing The purpose of this letter is to provide yo'u with Florida Power 5 Light Company's final response to the requirements of Item II.D.1 of NUREG-0737 concerning the PWR Safety and Relief Valve Test Program.
Attachment 1
contains the results of our evaluation of the oper ability of the St. Lucie Unit 1 pressurizer safety valves.
Attachment 2 contains the results of the evaluation of the pressurizer safety and rel i-ef valve piping for St. Lucie Unit 1.
The conclusions reached in the attachments to this letter and in our previous submittals of April 1, 1982, July 9,
- 1982, and August 13.,
- 1982, support the continued safe operation of St. Lucie Unit 1 and satisfies Florida Power 8 Light Company's responsibility to address the NRC concerns contained in Item II.D.1 of NUREG-0737.
Very truly yours, Robert E. Uhrig Vice President Advanced System and Technology REU/PKG/j s Attachment cc:
Mr. James P. O'Reil ly, Region II Harold F. Reis, Esquire P NS-L I-82-529 830i030i90 821230 PDR ADOCK 05000335 P
PDR PEOPLE... SERVING PEOPLE
]
1C
St. Lucie Unit 1 Docket No. 50<<335 Post-TMI Requirement PWR Relief and Safety 'Valve 'Testing Page 1 of 2 ATTACHMENT 1 SAFETY VALVE OPERABILITY In order to facilitate an expeditious evaluation of the test data, the utilities operating and constructing Combustion Engineering (CE) designed plants have, through the CE Owners Group, requested that CE implement a
'I program to evaluate and apply the EPRI test results.
The CE Owners Group program was subsequently initiated in April, 1982 and completed in December, 1982.
Florida Power and Light is a participant in this program.
The approach being applied by the CE Owners Group is to show that particular EPRI tests wee.e directly representative of plant-specific safety valve models and valve installations, and that acceptable valve operation was demonstrated.
Accordingly, CE report. CEN-227, entitled "S~ary Report on the Operability of Pressurizer Safety Valves in CE Designed Plants", is being forwarded separately to the NRC by Hr. Rik W. wells, Chairman of the CE Owners Group.
Florida Power and Light considers reoort CEN-227 to provide the required information on safety valve operability for St. Lucie Unit 81.
Based on CEN-227 there are three combinations of valve adjusting ring settings, demonstrated by EPRI Test results, that result in satisfactory operation.
The ring settings are (-45,-14),
(-55,-14),
and (-95-14).
The ring. settings 1 at St. Lucie Unit
~31 are (-72,-14), (-82,-14),
(-60,-14) and (-61,-14)*.
Since these ring settings are bounded by the former, Florida Power and Light concludes that the present ring settings will result in satisfactory safety valve operability.
This satisfies Florida Power and Light Company's responsibility to demonstrate safety valve operability in response to NUREG-0737.
Page 2 of 2
- Spare Valve Note 1.
These ring settings are relative to the level position in order to be directly comparable to the CE ring settings.
See CEN-227 paragraph 2.1.2 for a more detailed description of terms.
St. Lucie Unit 1 Docket Nc. 50-335 Post-TRI Reauirements PNR Relief and Safet
'Valve 'Testin Page 1 of 1
'ATTACHMENT 2 SAFETY AND RELIEF VALVE PIPING Ebasco Service has performed'nalyses on the safety and relief valve piping at St. Lucia Unit 81 ro evaluate the adequacy of the piping and supports.
A model was generated from piping isometrics which was used as input to the EPRI developed RETD'5 computer code.
Thermal-hydraulic properties were then
<<lculated by RELAP5 to be input into the postprocessor code CALPLOTFIIl, developed by Ebasco for the development of the appropriate fore'ng functions and time histories.
These forcing functions were generated
~
air from analysis of..the following scenarios of va've actuation.
a.
Two PORV's open simultaneously, SRV's closed.
b.
PORV's do not open.
All three SRV's open simultaneously.'.
PORVs open Pressurizer pressure continues to increase and SRVs open simultaneously.
Valve opening times were selected from the data tabulated in the EPRI Interim Test Report from valve tests representative of the St. Lucie Unit 81 valves and piping configuration.
The results of the present analyses were then compared with prior analyses which had resulted in the present design.
Based on the results of this evaluation it is concluded that the St. Lucie Unit /il Safety and Relief Valve piping and supports are adequate for the'resently calculated hydraulic loads.
This satisfies Florida Power 6 Light responsibility to demonstrate adequacy of the St. Lucie Unit f'1 Safety and Relief Valve Piping and Supports.