L-89-326, Forwards NTH-TR-01, Thermal Hydraulic Model Qualification Decrease in Heat Removal by Secondary Sys Events. Rept Presents Generic Methods Applicable to Util Nuclear Units & Intended to Support Plant Improvements
| ML17223A342 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie, Turkey Point, 05000000 |
| Issue date: | 10/02/1989 |
| From: | Goldberg J FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17223A343 | List: |
| References | |
| L-89-326, NUDOCS 8910060226 | |
| Download: ML17223A342 (4) | |
Text
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ACCESSION NBR: 89 10060226 DOC. DATE: 89/10/02 NOTARIZED: NO DOCKET FACIL:50-000 Generic Docket 05000000 50-250 Turkey Point Plant, Unit 3, Florida Power and Light C 05000250 50-25 1 Turkey Point Plant, Unit, 4, Florida Power and Light C 0500025 1
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Q 050003 89 AUTH. NAME AUTHOR AFFILIATION GOLDBERG, J. H.
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RECIP
. NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
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SUBJECT:
Forwards "Decrease in Heat Removal by Secondary Sys. "
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P.O. Box14000, Juno Beach, FL 33408.0420 FPL QCTQBER 2 198S L-89-326 U.S. Nuclear Regulatory Commission Attn: Document 'Control Desk Washington, D.C.
20555 Gentlemen:
Re:
Turkey Point Units 3 and 4
Docket Nos.
50-250 and 50-251 St. Lucie Units 1 and 2
Docket Nos.
50-335 and 50-389 Re ort NTH-TR-01 RETRAN MODEL UALIFICATION By letter L-86-04, dated January 7,
- 1986, Florida Power 6 Light Company (FPL) submitted to the NRC topical report NTH-G-6, "RETRAN Code Transient Analysis Model Qualification".
Additional information was provided in letters L-87-91, dated March 2,
- 1987, and L-87-164, dated April 10, 1987.
The Staff concluded in its Safety Evaluation dated April 19,
- 1988, (G.C.
Lainas to W.F.
Conway) that FPL had demonstrated the ability to use the RETRAN computer code to perform system transient calculations for St.
Lucie Units 1 and 2 and Turkey Point Units 3 and 4.
However, the Staff noted that the topical report did not present details in plant-specific nodalizations, control system modeling and assumptions for the licensing analyses.
On January 9, 1989, FPL and the NRC met to discuss FPL's plans for further use of RETRAN" in licensing submittals.
Based upon FPL's identification of a planned application of the "Decrease in Heat Removal of the Secondary System" event category, the Staff agreed to a RETRAN limited-scope submittal.
However, the Staff requested that FPL not use a piecemeal approach to developing a full spectrum of licensing analyses for RETRAN beyond that submittal.
The purpose of this submittal is to provide the attached additional information required by the NRC for one specific class of transient
- events, "Decrease in Heat Removal by the Secondary System" and obtain NRC approval for the use of RETRAN in licensing actions associated with transients within this category.
This submittal presents generic methods applicable to all four of FPL's nuclear units and is intended, at the outset, to support plant improvements for St. Lucie Plant to implement reactor trip reduction activities.
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U. S. Nuclear Regulatory Commission L-89-326 Page 2
If additional information is required on this topic, please contact us
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Very truly yours g< 4~g Executive Vice President JHG/MSD/tbj Attachment cc:
Stewart D. Ebneter, Regional Administrator, Region II, USNRC Resident Inspector, Turkey Point, USNRC Resident Inspector, St. Lucie, USNRC