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| issue date = 02/15/1977
| issue date = 02/15/1977
| title = LER 1977-001-00 for St. Lucie Unit 1, RCS Cold Leg Temperature Exceeded 542F During Weekly Test of Turbine Control Valves
| title = LER 1977-001-00 for St. Lucie Unit 1, RCS Cold Leg Temperature Exceeded 542F During Weekly Test of Turbine Control Valves
| author name = Schmidt A D
| author name = Schmidt A
| author affiliation = Florida Power & Light Co
| author affiliation = Florida Power & Light Co
| addressee name = Moseley N C
| addressee name = Moseley N
| addressee affiliation = NRC/IE, NRC/RGN-II
| addressee affiliation = NRC/IE, NRC/RGN-II
| docket = 05000335
| docket = 05000335
Line 16: Line 16:


=Text=
=Text=
{{#Wiki_filter:P.O.BOX 013100, MIAN'll, FL 33101@~I,'"!':FLORIDA POWER<Bi LIGHT COI.IPAi4Y February 15, 1977 PRN-LI-77-33 Mr.Norman C.Moseley, Director, Region II Office of Inspection and Enforcement U.S.Nuclear Regulatory Commission 230 Peachtree Street, N.W., Suite 1217 Atlanta, Georgia 30303  
{{#Wiki_filter:P. O. BOX 013100, MIAN'll, FL 33101
                                                        @~I,'"!':
FLORIDA POWER<Bi LIGHT COI.IPAi4Y February 15, 1977 PRN-LI-77-33 Mr. Norman C. Moseley, Director, Region     II Office of Inspection and Enforcement                               <EP!(p~
U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 1217 Atlanta, Georgia     30303
                                                                    ~4+ I$g~  TPg'g


==Dear Mr.Moseley:==
==Dear Mr. Moseley:==
<EP!(p~~4+I$g~TPg'g tug REPORTABLE OCCURRENCE 335-77-1 ST.LUCIE UNIT 1 DATE OF OCCURRENCE:
tug REPORTABLE OCCURRENCE 335-77-1 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: JANUARY 15, 1977 RCS COLD LEG TEMPERATURE The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject occurrence.
JANUARY 15, 1977 RCS COLD LEG TEMPERATURE The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject occurrence.
Very truly yours,                       'H8gnf .
Very truly yours, D.Schmidt Vice President Power Resources MAS/cpc Attachment
                                                                %;% Xr!Fife Wca~gq Peteg D. Schmidt Vice President Power Resources                                " e. qua MAS/cpc Attachment cc:   Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement             (30)
'H8gnf.%;Fife%Xr!Wca~gq Peteg" e.qua cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (30)Director, Office of Management Information and Program Control (3)243<~~i PEOPLE...SERVING PEOPLE CONTROL BLOCK<: 1 ucENBEE NAME F LI S L S 1,A>7 89 14 j15 LICENSEE EVENT s UCENSE BER s 0-0 0 0 8 0 UCcNSE TYPE EVENT TYPE 0 0 ii l 1 I l~0033?5.26 30 31 32 REPORT)P'E PRINT ALL REOUIRED 1&#xb9;QRtsfIATION)
Director, Office of Management Information and Program Control (3) 243<
CATEGORY TYPE~Q 1 00N'T~L 7 8 57 SB 59 REPORT SOURCE L.0 60 61 EVENT OESCRIPTION Jog During a weekly test of the QCCKET NUMaER EVENT CATE REPORT OATS 5 0-0 3 3 5 0 1 1 5 7 7 0 2 1 5 7 7 68 69 74 75 60 I turbine control valves, RCS cold leg temperature exceeded 7 8 9 BO{003[542F twice.The maximum temperature reached was 543F.The RCS was above 542F for less 80 n t'wo minutes.Immediate corrective action was to reduce RCS cold le temperature 7 8 9 80 QOg in compliance with the acti'on statement of Specification 3.2.5.a.This was the first 7 89 QOQ re ortable occurrence at St.Lucie Uni t 1 during which RCS cold leg temperature 80, 7 8 9 SYSTEM CAUSE COOE CQOE CQMPQNENT CQQE[oczl~vA~F.i fl s T R 0 7 8 9 10 11 12 17'AUSE OESCRIPTION jODg The RCS temperature changes were BC PA'sIE COMPO NctfT SUPPLIER COh'PQFIENT MANU FACii'F ER W 1 2 0 turbine load rejections of about 50 Hwe.J caused by 7 8 9 80[oa9]The load re'actions occurred while transferring from sequential valve control to single 7 8 9~10 EG 1 d'versa.The transfers were not as smooth as the should have OTHER S~ATUS N/A AMOUNT QF ACTIVITY N/A 7 8 9 LOGS OR OAMAGE TO FACIUTY TYPE OESCR~ION QE QZ 7 89 10 PUBLICITY 7 89 FACAriY STATUS'.C PQWFR~e~oe ol 7 8 9, 10 12 13 FORM QF ACTIVlTY CQtlTENT RELEASEQ OF REI.EASE~z~z 7 8 9 10 11 PERSONNEL EXPOSURES tIUMBER TYPE OESCRIPTiCN
                                                                  ~ ~
~sa~ol o o z 7 8 9 11 12 13 PERS'ONi4EL INJURIES NUMBER CESCRIPTIQN
i PEOPLE... SERVING PEOPLE
[T~-.)Loeooj 7 8 9 11 12 PROBABLE CONSEQUENCES Q~g METHOO OF OISCCVERY 44 45 46 45 N/A N/A N/A N/A N/A OISCOVERY OESCRIPT'CN N/A LOCATION QF RELEASE N/A 80 60 7 89 AOOITIONAL FACTORS~18 See a e 2 for continuation of Event Description and Cause Description.
 
89l119l89 NAME.H.A.Scho man 305/552 3779 CFO 443 s 44' REPORTABLE OCCURBEHCE 335-77-t L1CENSEE EVEHTB 4EPORT PAGE TWO Event Oescri tion (continued) exceeded 542F.(335-'77-1).
LICENSEE EVENT REPORT CONTROL BLOCK<:                                                                               )P      'E PRINT ALL REOUIRED 1&#xb9;QRtsfIATION) 1 ucENBEE                                             s                                                  UCcNSE                EVENT NAME                                           UCENSE          BER                                        TYPE                TYPE F   LI   S     L       S     1,A>           0   0         0   0   8 s
~~Cause Descri tion (continued) been because of minor inaccuracies in the characteristic curves for sequential valve control and single valve control which had been set into the turbine control system.This was also the first time such a transfer was used"at high turbine.loads Permanent corrective action will be to revise the valve characteristic curves set into the turbine control system,'ased on data taken by vendor representatives on January 9-11, 1977.}}
0         0   0           ii   l     1   I   l     ~0033
                ~
7    89                                  14    j15                                                    ?5     .26                       30     31     32 REPORT CATEGORY             TYPE     SOURCE                QCCKET NUMaER                                  EVENT CATE                        REPORT OATS
  ~Q 1   00N'T                           L           L   . 0   5   0         0     3   3   5       0     1     1   5     7   7       0     2   1     5   7   7 7    8        57      SB          59          60      61                                    68     69                             74   75                         60 EVENT OESCRIPTION I
Jog        During      a  weekly test of the turbine control valves,                                       RCS     cold leg temperature exceeded 7   8 9                                                                                                                                                                   BO
{003[       542F   twice.             The maximum temperature                   reached was 543F.                 The   RCS     was above 542F           for less 80 n t'wo     minutes.               Immediate       corrective action was to reduce RCS cold le temperature 7 8 9                                                                                                                                                                     80 QOg         in compliance with the acti'on statement of Specification 3.2.5.a. This was the first 7 89                                                                                                                                                                     80, QOQ         re ortable occurrence at St. Lucie Uni t                                     1   during which RCS cold leg temperature 7   8 9                                                                         PA'sIE                                                                                  BC SYSTEM       CAUSE                                                 COMPO NctfT              COh'PQFIENT COOE       CQOE                   CQMPQNENT CQQE                   SUPPLIER              MANUFACii 'F ER
[oczl   ~vA           ~F                 .i     fl s T R           0                            W      1    2      0 7   8 9 10               11           12                           17
      'AUSE       OESCRIPTION jODg       The RCS         temperature changes were caused by turbine load rejections of about 50 Hwe.                                                                   J 7 8 9                                                                                                                                                                     80
[oa9]       The load         re'actions occurred while transferring from sequential valve control to single 7 8 9                                                                                                                                                                     EG
~10                                   1         d     'versa.             The   transfers were not                 as smooth as the             should have 7 89                                                                                                                                                                      80 FACAriY                                                                      METHOO OF STATUS                    PQWFR                    OTHER S ~ ATUS             OISCCVERY                            OISCOVERY OESCRIPT'CN 9,
                                  '.C 7    8
              ~e             ~oe 10 ol 12   13 N/A 44      45      46 N/A FORM QF ACTIVlTY       CQtlTENT RELEASEQ       OF REI.EASE                 AMOUNT QF ACTIVITY                                                        LOCATION QF RELEASE
              ~z             ~z                                 N/A                                                                  N/A 7   8       9                 10         11                                                   45                                                                        60 PERSONNEL EXPOSURES tIUMBER           TYPE           OESCRIPTiCN
~sa     ~ol   o   o           z                                                                         N/A 7   8 9               11       12       13 PERS'ONi4EL INJURIES NUMBER             CESCRIPTIQN
[T~-.)
7   8 9 Loeooj                                                                                            N/A 11     12 PROBABLE CONSEQUENCES Q~g                                                                                                       N/A 7    8 9 LOGS OR OAMAGE TO FACIUTY TYPE      OESCR~ION QE      QZ                                                                                                N/A 7    89          10 PUBLICITY N/A 7   89 AOOITIONAL FACTORS
~18         See     a e 2         for continuation of Event Description                               and Cause         Description.
89 l119l 89 NAME.         H. A. Scho             man                                                                 305/552 3779 CFO   443 s 44'
 
REPORTABLE OCCURBEHCE     335-77-t L1CENSEE EVEHTB 4EPORT PAGE TWO Event Oescri   tion (continued) exceeded 542F.   (335-'77-1).           ~ ~
Cause Descri   tion (continued) been because of minor inaccuracies in the characteristic curves for sequential valve control and single valve control which had been set into the turbine control system. This was also the first time such a transfer was used "at high turbine. loads Permanent corrective action will be to revise the valve characteristic curves set into the turbine control system,'ased on data taken by vendor representatives on January 9-11, 1977.}}

Latest revision as of 01:01, 21 October 2019

LER 1977-001-00 for St. Lucie Unit 1, RCS Cold Leg Temperature Exceeded 542F During Weekly Test of Turbine Control Valves
ML18144A703
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 02/15/1977
From: Schmidt A
Florida Power & Light Co
To: Moseley N
NRC/IE, NRC/RGN-II
References
PRN-LI-77-33
Download: ML18144A703 (3)
v • d • e


Text

P. O. BOX 013100, MIAN'll, FL 33101

@~I,'"!':

FLORIDA POWER<Bi LIGHT COI.IPAi4Y February 15, 1977 PRN-LI-77-33 Mr. Norman C. Moseley, Director, Region II Office of Inspection and Enforcement <EP!(p~

U. S. Nuclear Regulatory Commission 230 Peachtree Street, N. W., Suite 1217 Atlanta, Georgia 30303

~4+ I$g~ TPg'g

Dear Mr. Moseley:

tug REPORTABLE OCCURRENCE 335-77-1 ST. LUCIE UNIT 1 DATE OF OCCURRENCE: JANUARY 15, 1977 RCS COLD LEG TEMPERATURE The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject occurrence.

Very truly yours, 'H8gnf .

%;% Xr!Fife Wca~gq Peteg D. Schmidt Vice President Power Resources " e. qua MAS/cpc Attachment cc: Robert Lowenstein, Esquire Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3) 243<

~ ~

i PEOPLE... SERVING PEOPLE

LICENSEE EVENT REPORT CONTROL BLOCK<: )P 'E PRINT ALL REOUIRED 1¹QRtsfIATION) 1 ucENBEE s UCcNSE EVENT NAME UCENSE BER TYPE TYPE F LI S L S 1,A> 0 0 0 0 8 s

0 0 0 ii l 1 I l ~0033

~

7 89 14 j15 ?5 .26 30 31 32 REPORT CATEGORY TYPE SOURCE QCCKET NUMaER EVENT CATE REPORT OATS

~Q 1 00N'T L L . 0 5 0 0 3 3 5 0 1 1 5 7 7 0 2 1 5 7 7 7 8 57 SB 59 60 61 68 69 74 75 60 EVENT OESCRIPTION I

Jog During a weekly test of the turbine control valves, RCS cold leg temperature exceeded 7 8 9 BO

{003[ 542F twice. The maximum temperature reached was 543F. The RCS was above 542F for less 80 n t'wo minutes. Immediate corrective action was to reduce RCS cold le temperature 7 8 9 80 QOg in compliance with the acti'on statement of Specification 3.2.5.a. This was the first 7 89 80, QOQ re ortable occurrence at St. Lucie Uni t 1 during which RCS cold leg temperature 7 8 9 PA'sIE BC SYSTEM CAUSE COMPO NctfT COh'PQFIENT COOE CQOE CQMPQNENT CQQE SUPPLIER MANUFACii 'F ER

[oczl ~vA ~F .i fl s T R 0 W 1 2 0 7 8 9 10 11 12 17

'AUSE OESCRIPTION jODg The RCS temperature changes were caused by turbine load rejections of about 50 Hwe. J 7 8 9 80

[oa9] The load re'actions occurred while transferring from sequential valve control to single 7 8 9 EG

~10 1 d 'versa. The transfers were not as smooth as the should have 7 89 80 FACAriY METHOO OF STATUS PQWFR OTHER S ~ ATUS OISCCVERY OISCOVERY OESCRIPT'CN 9,

'.C 7 8

~e ~oe 10 ol 12 13 N/A 44 45 46 N/A FORM QF ACTIVlTY CQtlTENT RELEASEQ OF REI.EASE AMOUNT QF ACTIVITY LOCATION QF RELEASE

~z ~z N/A N/A 7 8 9 10 11 45 60 PERSONNEL EXPOSURES tIUMBER TYPE OESCRIPTiCN

~sa ~ol o o z N/A 7 8 9 11 12 13 PERS'ONi4EL INJURIES NUMBER CESCRIPTIQN

[T~-.)

7 8 9 Loeooj N/A 11 12 PROBABLE CONSEQUENCES Q~g N/A 7 8 9 LOGS OR OAMAGE TO FACIUTY TYPE OESCR~ION QE QZ N/A 7 89 10 PUBLICITY N/A 7 89 AOOITIONAL FACTORS

~18 See a e 2 for continuation of Event Description and Cause Description.

89 l119l 89 NAME. H. A. Scho man 305/552 3779 CFO 443 s 44'

REPORTABLE OCCURBEHCE 335-77-t L1CENSEE EVEHTB 4EPORT PAGE TWO Event Oescri tion (continued) exceeded 542F. (335-'77-1). ~ ~

Cause Descri tion (continued) been because of minor inaccuracies in the characteristic curves for sequential valve control and single valve control which had been set into the turbine control system. This was also the first time such a transfer was used "at high turbine. loads Permanent corrective action will be to revise the valve characteristic curves set into the turbine control system,'ased on data taken by vendor representatives on January 9-11, 1977.

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