View source for L-76-326, Response to Letter of 8/13/1976 to Evaluate Reactor Coolant System Design and Provide Certain Information Regarding Susceptibility to Overpressurization Events, FP&L Will Report the Results by 10/15/1976

{{Adams
| number = ML18127B157
| issue date = 09/03/1976
| title = Response to Letter of 8/13/1976 to Evaluate Reactor Coolant System Design and Provide Certain Information Regarding Susceptibility to Overpressurization Events, FP&L Will Report the Results by 10/15/1976
| author name = Uhrig R
| author affiliation = Florida Power &amp; Light Co
| addressee name = Ziemann D
| addressee affiliation = NRC/NRR
| docket = 05000335
| license number = DPR-067
| contact person = 
| case reference number = L-76-326
| document type = Letter type:L, Response to Request for Additional Information (RAI)
| page count = 5
}}

=Text=
{{#Wiki_filter:NRC FoRM 195                                                   U.S. NUCLL'AR REGULATORY  'ISSION DOCKET NUMOER g 7al             r
                                                                                                                 '0-335 FILE NUMBERS NRC DISTRIBUTION FoR PART 60 DOCI<ET MATERIAL                                        RIb~ f TO:                                                     FROM:                                     DATE OF DOCUI1ENT Florida    Power &   Light   Company           9 3 76 Mr. Dennis L. Ziemann                                Miami, Florida                          DATE RECEIVED ABETTER                                                   Ifr. Robert E. Uhrig                           10 22 76 0 NOTOR IZ E D              PROP                    INPUT FORM        NUMBER OF COPIFS RECEIVED 0 ORIGINAL.             JRCUNC LASS IF I E D                                                         One signed copy
    @SCOP Y DESCRIPTION                                                             ENCLOSURE Ltr. re      our 8/13/76 ltr....furnishing requested information regarding Reactor                                  ACKNOWLZDGED.
Vesspl Overpressurization.
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REACTOR VESSEL OVERPRESSURIZATION DISTRIBUTION PER G EECH 10-21-76 PLANT NAME:
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P. O. BQX jc 6g~~g               ~gg V' Sc ~tember 3, 197; L-76-326 Office of nuclear Reactor Regulation Attention: Rr. Dennis L. Eiemann, Chief Operating Reactors Branch 02 Division of Operating Reactors U S. Nuclear Regulatory Comission Sashington, D. C. 20555 Dear Hx. Ziemann=
Re:   St. Lucie Unit  1 Docket No. 50-335 Reactor Uessel Ove ressurization Your letter of August 13, 1976 requested that Florida Power        a Light Company (PPL) evaluate the St. Lucie reactor coolant system design and provide certain information regarding the susceptibility to overpressurization events. You requested that we either provide the information within 60 days, or explain why we cannot taeet this schedule and provide a schedule that we will meet.
Xn response to your request, FPL has joined a utility tas3c group which was formed to examine the complexity of overpressurization events for the purpose of developing a solution to the over-pressurization problem. The task group wilX. meet in the near future to evaluate ways to minimize the potential for reactor vessel overpressurization events.
In addition, some revisions to the St. Xucie Unit 1 operating procedures have been made to reduce the probability of ovei-pressurization events. FPL will continue to examine the St.
Lucie operating procedures and administrative control.s during the 60 day period referenced in your letter to evaluate possible additional procedural changes which could further reduce the possibility of reactor vessel overpressurization.        As an 9.nteri~
measure plant operating personnel have been directe8 to exercise caution, especially during operation at reduced pressure and temperature, in controlling primary systen pressure.

Office of Nuclear Reactor Regulation Attention: Ma. Dennis L- Ziemann, Chief Page Two Re  vill report the results of task group meetings and FpL Procedure reviews by October l5, 1S76. Our recoumenQations and a schedule for providing the information you requested vi3.l be included in the report.
Very truly yours, Robert: E. Uhrig Vice President
,RBU/NAS/cpc cc. Hr. Nolan   C. Hose).ey Jack R. Hevman, Esquire

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