ML19263D720: Difference between revisions

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{{#Wiki_filter:.
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  .
O VIRGINIA ELECTRIC Afl0 POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH nycw      YEAR 1979 SUBMITTED:
O
                                                                .
          .
VIRGINIA ELECTRIC Afl0 POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH nycw      YEAR 1979 SUBMITTED:
N3 \            %A SUPERINIEDDENT - OPERATIONS APPROVED:
N3 \            %A SUPERINIEDDENT - OPERATIONS APPROVED:
MANAGER)
MANAGER)
YOU413c)(fs'
YOU413c)(fs'


_ _ _ . _ _ _ _ . - _
.
OPERATING D ATA REPORT DOCKET NO.      en-3',
OPERATING D ATA REPORT DOCKET NO.      en-3',
DATE      4-4-79 COMPLETED BY      ''    P- "idison TELEPHONE      N 4-H94-5151 OPERATING STATUS Notes
DATE      4-4-79 COMPLETED BY      ''    P- "idison TELEPHONE      N 4-H94-5151 OPERATING STATUS Notes
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: 16. Gross Thermal Energy Generated (MWH)            1 Ada 166              s 159 675              17 E?.470
: 16. Gross Thermal Energy Generated (MWH)            1 Ada 166              s 159 675              17 E?.470
: 17. Gross Electrical Energy Generated (MWH)            en* n'n
: 17. Gross Electrical Energy Generated (MWH)            en* n'n
                                                                        ,
_. 1,e4n,,1s                s, san _nn, 559,410            1,553,280                5,217,860
_. 1,e4n,,1s                s, san _nn, 559,410            1,553,280                5,217,860
: 18. Net Electrical Energy Generated (MWII) 93.9                      89.8                  91.8
: 18. Net Electrical Energy Generated (MWII) 93.9                      89.8                  91.8
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: 22. Unit Capacity Factor (Using DER Net) 6.1                      7.4                    3.1
: 22. Unit Capacity Factor (Using DER Net) 6.1                      7.4                    3.1
: 23. Unit Forced Outage Rate
: 23. Unit Forced Outage Rate
                                                                                                                  '
: 24. Shutdowns Scheduled Over Next 6 Months (Type. Date.and Duration of Each):
: 24. Shutdowns Scheduled Over Next 6 Months (Type. Date.and Duration of Each):
c.m u    9m ,a;~          .y  43  in,o    ,    m t.
c.m u    9m ,a;~          .y  43  in,o    ,    m t.
: 25. If Shut Down At End Of Report Period. Estimated Date of Startup:    A''r i 1  10- 1979
: 25. If Shut Down At End Of Report Period. Estimated Date of Startup:    A''r i 1  10- 1979
: 26. Units In Test Status (Prior to Commercial Operation):                      Forecast            Achiesed INITIA L CRITICALITY INITIAL ELECTRICITY COMM ERCIAL OPERATION to/77)
: 26. Units In Test Status (Prior to Commercial Operation):                      Forecast            Achiesed INITIA L CRITICALITY INITIAL ELECTRICITY COMM ERCIAL OPERATION to/77)
                                                                                            .


*                                                                                                                                                              .
                                               !%5tRKTic%3 FOR CoxrLET:NG CftR 4 TING D4T 4 RFFOs*T Th ecrves%+ M tv eci= v.e,! eth aaen T = Ixcewes %e este* ed teW'i<='ic e='ree' ef the rremre sWd N pe,=ded im                                                  11 L?=TT SERWE F ACTOR (w ree byn.*fetben.re av desg-rro r> es The :s%resc rwts kee. a<e rec =ded se asw keasecs ti rero irs *e de a sewe*,:= The c.we+er af i4                                                  the reatesiae *as ' Lee fWm f 4) >= the p="es hm s se erera ci w** s~r-ese-wf ** *e . evt a wee of "e cryrt f. ma,            -
                                               !%5tRKTic%3 FOR CoxrLET:NG CftR 4 TING D4T 4 RFFOs*T Th ecrves%+ M tv eci= v.e,! eth aaen T = Ixcewes %e este* ed teW'i<='ic e='ree' ef the rremre sWd N pe,=ded im                                                  11 L?=TT SERWE F ACTOR (w ree byn.*fetben.re av desg-rro r> es The :s%resc rwts kee. a<e rec =ded se asw keasecs ti rero irs *e de a sewe*,:= The c.we+er af i4                                                  the reatesiae *as ' Lee fWm f 4) >= the p="es hm s se erera ci w** s~r-ese-wf ** *e . evt a wee of "e cryrt f. ma,            -
the ecpore g gen =d fdess Iii F *r'*9 88 Te e"' 'a ''*
the ecpore g gen =d fdess Iii F *r'*9 88 Te e"' 'a ''*
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         +c mrt        . er , c . ree se d en we e- r s, e=<*e* ly a n        12.%LM3TR OF frM R3 R 7. ACTOR
         +c mrt        . er , c . ree se d en we e- r s, e=<*e* ly a n        12.%LM3TR OF frM R3 R 7. ACTOR
* t.1 C1tTT:C4E                                      21.13ff C 4P ACTTT F 4CTOR (LMNG aaric %EY6 Con 6 e.wei b 6. S w o Rer ir +1 C""**                      ce .                $** TSe **t 81 '''e" 'd f **S 'h' '''''** *** C"th *I
* t.1 C1tTT:C4E                                      21.13ff C 4P ACTTT F 4CTOR (LMNG aaric %EY6 Con 6 e.wei b 6. S w o Rer ir +1 C""**                      ce .                $** TSe **t 81 '''e" 'd f **S 'h' '''''** *** C"th *I
                                                                                                                                                                                                          .
                                                                                                                                                                                                                           ,g            g dreg the reis Wrs of 'he 'ef+etas Ped                                              b ,% p,cid m M esisam gre W cp t's f r e''i 4 % 4 W PL 4 T F F 4 71%C (CR O41 af *',1                  T%e esmer re                                                                                            y n,,,eg su g .,e hmes > me cerc<t r t f*'*if is*** I I) y .e. d-u r-e cf tN re me serorar > c=ep*c't                          !L R E.*CTOR RFU R% E 511UTDC'eN If0t1'S TH i+4sf
                                                                                                                                                                                                                           ,g            g dreg the reis Wrs of 'he 'ef+etas Ped                                              b ,% p,cid m M esisam gre W cp t's f r e''i 4 % 4 W PL 4 T F F 4 71%C (CR O41 af *',1                  T%e esmer re                                                                                            y n,,,eg su g .,e hmes > me cerc<t r t f*'*if is*** I I) y .e. d-u r-e cf tN re me serorar > c=ep*c't                          !L R E.*CTOR RFU R% E 511UTDC'eN If0t1'S TH i+4sf
                                                                                                                                                                       ,          ,            , a ,w .e.,c, ,, g er , pe,m 3 erees tuv' t) eres r%e wrer're gr=ce fac ae                  cf t%e e
                                                                                                                                                                       ,          ,            , a ,w .e.,c, ,, g er , pe,m 3 erees tuv' t) eres r%e wrer're gr=ce fac ae                  cf t%e e
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4 . we . = W have- u sa vs '.p r i , 1%r e.4 nf eke remi                  d'M N 5 "'*N #d * *' * ** '' 3 ''' **
4 . we . = W have- u sa vs '.p r i , 1%r e.4 nf eke remi                  d'M N 5 "'*N #d * *' * ** '' 3 ''' **
* N co t en de                                N    *U * *8 Ma r* *M N N e* d W                            *d b 5 cis et so N we vmn -si rn v W T1e vredavse i <w    ==<s e ve==rr 4 ere w.. y ehe e..J c.f .6.e                        f g, e, . A, er . J p            e,., J on , w        ,3 y h vg pr W 19 p ee b. ann f w. ite %ers'aws r f N ce -=1                        :=e afw== cos t.I em ss == a* s s' e"s a e ste f4/77 )
* N co t en de                                N    *U * *8 Ma r* *M N N e* d W                            *d b 5 cis et so N we vmn -si rn v W T1e vredavse i <w    ==<s e ve==rr 4 ere w.. y ehe e..J c.f .6.e                        f g, e, . A, er . J p            e,., J on , w        ,3 y h vg pr W 19 p ee b. ann f w. ite %ers'aws r f N ce -=1                        :=e afw== cos t.I em ss == a* s s' e"s a e ste f4/77 )
                                                                                                                                                                                              .
k
k
                                                                                          .
                                                                                                                                              -.


.
AVERAGE DAILY UNIT POWER LEVEL DOCKE T NO.      so- un UNIT    MA 1 DATE      4-4-79 CO\lPLETED BY        W. R. Marlison TELEPilONE      703-894-5151 SiONTil    March 1979 DAY        AVERAGE DAILY POWER LEVEL                          DAY      AVER AGE D \lLY POWER LEVEL (MWe Net)                                                  (SIWE-Net)
AVERAGE DAILY UNIT POWER LEVEL DOCKE T NO.      so- un UNIT    MA 1 DATE      4-4-79 CO\lPLETED BY        W. R. Marlison TELEPilONE      703-894-5151 SiONTil    March 1979 DAY        AVERAGE DAILY POWER LEVEL                          DAY      AVER AGE D \lLY POWER LEVEL (MWe Net)                                                  (SIWE-Net)
I                      819                                17                    800 y                      826                                gg 814 3                        822                                19                    717 4                        823                                20                    449 5                        826                                y,                    811 6                        829                                22 809 821                                                        725 7                                                            23 8                        "22                                24                    4 7r, 9      _                821                                25                    n91 10                      821                                  26                    R?1 II                      818                                  27                    934 12 819                                                        gy4 2g 13                      820                                  29                    Aln 14                      821                                30                    A77 15                      822                                31                      n 16                      814 INSTRUCTIONS On this format, list the average daily unit power leselin MWe Net for each day in the reporting month. Compute to the nearest whole megawatt.
I                      819                                17                    800 y                      826                                gg 814 3                        822                                19                    717 4                        823                                20                    449 5                        826                                y,                    811 6                        829                                22 809 821                                                        725 7                                                            23 8                        "22                                24                    4 7r, 9      _                821                                25                    n91 10                      821                                  26                    R?1 II                      818                                  27                    934 12 819                                                        gy4 2g 13                      820                                  29                    Aln 14                      821                                30                    A77 15                      822                                31                      n 16                      814 INSTRUCTIONS On this format, list the average daily unit power leselin MWe Net for each day in the reporting month. Compute to the nearest whole megawatt.
(9/77)
(9/77)


                                                                                                                                                    .  .
. .
                                                                                                                                                      .
DOCKr T NO.            50-338 UNIT SilUTUOWNS AND POWER REDUCTIONS UNII N AttE _50rtn anna DATE      4-2-79 Ifarch, 1979                  COstPLETED BY A G . P.'o u 4 r REPORT MONTil                                    TEhEPil0NE 7M-89d G1 1 v-229 e.
DOCKr T NO.            50-338 UNIT SilUTUOWNS AND POWER REDUCTIONS UNII N AttE _50rtn anna DATE      4-2-79 Ifarch, 1979                  COstPLETED BY A G . P.'o u 4 r REPORT MONTil                                    TEhEPil0NE 7M-89d G1 1 v-229 e.
jg        3      E        Licensee    ,E g                              Cause & Corrective h~'5
jg        3      E        Licensee    ,E g                              Cause & Corrective h~'5 No.        Date      i      5 Ej        i  25            Event 37          gU 7                      Attion to H        yE        E  jg          Rep rt*t    u) U                              Present Recurrence g
                            ,
No.        Date      i      5 Ej        i  25            Event 37          gU 7                      Attion to H        yE        E  jg          Rep rt*t    u) U                              Present Recurrence g
c5 79-3      790319      F        11.3      B*    4*                                        Leak of Electro Hydraulic Fluid from pump discharge header. Rewelded and installed pipe hangers and shock rnour          ts.
c5 79-3      790319      F        11.3      B*    4*                                        Leak of Electro Hydraulic Fluid from pump discharge header. Rewelded and installed pipe hangers and shock rnour          ts.
79-4      790323      F          0      B*    4*      LER/R0 79037  CB      VALVCP      Ramped down to 15% reactor power to enter the reactor containment to investigate the reason for prinary leak rate and to perforn turbine valve freedom test. Cause was a packing gland leak from pCV-14558, backseated the valve to stop the leakage.
79-4      790323      F          0      B*    4*      LER/R0 79037  CB      VALVCP      Ramped down to 15% reactor power to enter the reactor containment to investigate the reason for prinary leak rate and to perforn turbine valve freedom test. Cause was a packing gland leak from pCV-14558, backseated the valve to stop the leakage.
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Shutdown 19-5 continued into April.
Shutdown 19-5 continued into April.


                                                                                                                                      *
                                                                                                                                  ,
UNIT SilUTDOWNS AND POWER REDUCTIONS INSTRUCTIONS Tha report should desenbe all plant shutdowns dunng the          in ace-L.".e wnh the table appearing on the report form report period. In addinon,it should be the source of explan. If category 4 must be used, supply bnet comments.
UNIT SilUTDOWNS AND POWER REDUCTIONS INSTRUCTIONS Tha report should desenbe all plant shutdowns dunng the          in ace-L.".e wnh the table appearing on the report form report period. In addinon,it should be the source of explan. If category 4 must be used, supply bnet comments.
ation of sigruficant dips m average power levels. Enh sym.
ation of sigruficant dips m average power levels. Enh sym.
ficant reduenon m power level tgreater than 20% reduction      LICENSEE EVENT REPORT . Reference the applicable in average dady power level for the precedmg 24 hours)          reportable occurrence pertauung to the outage or pow e r should be noted, even though the umt may not have been          redue non. Lnter the first four parts (event year. sequentul shut down completely l. For such reductions m power level,      report number, occurreNe code and report type) of the tive the duranon should be hsted as zero, the method of reductmn      part designahon as described in item 17 of Instruenons for should be hsted as 4 (Other), and the Cause and Corrective      Preparanon of Data Entry Sheets for Licensee Lvent Report Action to Prevent Recurrence column should explam. The          (LER) Fde (NUREGol61). This informanon may not t'e Cause and Correcuve Action to Prevent Recurrence column          amnedutely endent for all such shutdowns. of sourse, smce should be used to provide any needed explanation to fully        funher mvesuganon may be uquired to assertam whether or desenbe the circumstanses of the outage or power reduenon.      not a reponable oaunence was involved.) If the outage or power reduction wdl not result in a reportable occurrence.
ficant reduenon m power level tgreater than 20% reduction      LICENSEE EVENT REPORT . Reference the applicable in average dady power level for the precedmg 24 hours)          reportable occurrence pertauung to the outage or pow e r should be noted, even though the umt may not have been          redue non. Lnter the first four parts (event year. sequentul shut down completely l. For such reductions m power level,      report number, occurreNe code and report type) of the tive the duranon should be hsted as zero, the method of reductmn      part designahon as described in item 17 of Instruenons for should be hsted as 4 (Other), and the Cause and Corrective      Preparanon of Data Entry Sheets for Licensee Lvent Report Action to Prevent Recurrence column should explam. The          (LER) Fde (NUREGol61). This informanon may not t'e Cause and Correcuve Action to Prevent Recurrence column          amnedutely endent for all such shutdowns. of sourse, smce should be used to provide any needed explanation to fully        funher mvesuganon may be uquired to assertam whether or desenbe the circumstanses of the outage or power reduenon.      not a reponable oaunence was involved.) If the outage or power reduction wdl not result in a reportable occurrence.
NUSillER. This coiumn should indicate the sequental num.        the positne mdication of this lack of correlation should be her assigned to each shutdown or sigmticant reduction m power    n led Js not JpphCJble (N/A) for that calendar year. When a shutdown or sigmtieant power reduction begms m one report penod and ends in another,        SYSTE31 CODE. The system m which the outne or power
NUSillER. This coiumn should indicate the sequental num.        the positne mdication of this lack of correlation should be her assigned to each shutdown or sigmticant reduction m power    n led Js not JpphCJble (N/A) for that calendar year. When a shutdown or sigmtieant power reduction begms m one report penod and ends in another,        SYSTE31 CODE. The system m which the outne or power an entry should be made for both report penuds to be sure        "" "" originated should be noted by the two digit code of Exlubit G, Instructions for Preparanon of Data i ntry Sheets all shutdowns or syndleant power reductions are reported.
                '
an entry should be made for both report penuds to be sure        "" "" originated should be noted by the two digit code of Exlubit G, Instructions for Preparanon of Data i ntry Sheets all shutdowns or syndleant power reductions are reported.
4 Untd a umt has uhieved its first power generation, no num-      for Licensee      nt Rmn C ER) Fue(NUREGol61).
4 Untd a umt has uhieved its first power generation, no num-      for Licensee      nt Rmn C ER) Fue(NUREGol61).
ber should be assigned to each entry.                          Systems that do not .it an) existmg code should be designa.
ber should be assigned to each entry.                          Systems that do not .it an) existmg code should be designa.
Line 176: Line 152:
HENCE. Uw the solumn in a narrative fashion to amplify or for was on hne should equal the gross hours in the reportmg pe n d .                                                        explam the circumstances of the shutdown or power reduction.
HENCE. Uw the solumn in a narrative fashion to amplify or for was on hne should equal the gross hours in the reportmg pe n d .                                                        explam the circumstances of the shutdown or power reduction.
The column should mclude the specifie eauw for each shut.
The column should mclude the specifie eauw for each shut.
REASON. Categonie by letter deugnattun m accordance            down or sigmticant power reduction and the immediate and
REASON. Categonie by letter deugnattun m accordance            down or sigmticant power reduction and the immediate and wnh the table appearmg on the report form. If category ll      contemplated long term corrective action taken. if appropf t.
                                                                                '
wnh the table appearmg on the report form. If category ll      contemplated long term corrective action taken. if appropf t.
must be used, suppis bnet comments                              are. This column should also be used for a desenprion of the ufety related corrective mamtenance performed dunny SIETilOD OF SilUITING DOWN Tile REACTOR OR                      the outage or power reduenon meludmg an idenntication of REDUCING POWER            Categonie by number deugnation
must be used, suppis bnet comments                              are. This column should also be used for a desenprion of the ufety related corrective mamtenance performed dunny SIETilOD OF SilUITING DOWN Tile REACTOR OR                      the outage or power reduenon meludmg an idenntication of REDUCING POWER            Categonie by number deugnation
                                        '
                                                                     #'"          P  #N '" ' "P"" "' '" Y " " # "            #
                                                                     #'"          P  #N '" ' "P"" "' '" Y " " # "            #
radioactmty or smgle radution esposure >pesilhally assos i-INote th. t this differs f rom the Edison Electnc Insntute      ated wah the outue whhh accounts for more than 10 percent (EEI) oerimtions of " Forced Parnal Outage" and " Sche.          of the allowable annual values duled Partul Outage.' For these terms. EE! uses a change of      For long textual reports contmue narrative on separate paper 30 N1W as the break pmnt For larpr power reastors. 30 N!W        and referense the sh ut dow n or power redu non for tha
radioactmty or smgle radution esposure >pesilhally assos i-INote th. t this differs f rom the Edison Electnc Insntute      ated wah the outue whhh accounts for more than 10 percent (EEI) oerimtions of " Forced Parnal Outage" and " Sche.          of the allowable annual values duled Partul Outage.' For these terms. EE! uses a change of      For long textual reports contmue narrative on separate paper 30 N1W as the break pmnt For larpr power reastors. 30 N!W        and referense the sh ut dow n or power redu non for tha n too small a shance to warrant esplanation                      aarranve h
                                                                                                                                      ,
n too small a shance to warrant esplanation                      aarranve
                                                                                                                                      ,
h


.
Paget of 1 UNIT SilUTDOWN AND POWER REDUCTIONS EXPLANATION SIIEET        DOCKET No. 50-338 REPORT MONTl! MARCII      UNIT NAME  NORTil ANNA YEAR _1979        DATE      4-2-79 COMPLETED BY ANDY NEUFER 79-3  (B)  llydraulic fluid, used to control the main turbine govenor throttle, reheat and intercept valve began to leak from a joint in the pump discharge header. The unit was shutdown for reweld-ing of the leaking joint. At this time pipe hangers and shock mounts were added to prevent vibration due to pump oscillation (by design) total down time was 11.3 hours.
Paget of 1
.
UNIT SilUTDOWN AND POWER REDUCTIONS EXPLANATION SIIEET        DOCKET No. 50-338 REPORT MONTl! MARCII      UNIT NAME  NORTil ANNA YEAR _1979        DATE      4-2-79
            '
COMPLETED BY ANDY NEUFER 79-3  (B)  llydraulic fluid, used to control the main turbine govenor throttle, reheat and intercept valve began to leak from a joint in the pump discharge header. The unit was shutdown for reweld-ing of the leaking joint. At this time pipe hangers and shock mounts were added to prevent vibration due to pump oscillation (by design) total down time was 11.3 hours.
79-3  (4)  The reactor was not shut down.
79-3  (4)  The reactor was not shut down.
79-4  (B)  A calculation of the unidentified primary coolant leak rate indicated a    1.95 GPM leak. Reactor power was reduced so that station personnel could enter the containment to evaluate and identify the cause of the leakage. Inspection team found PCV-1455B, a pressurizer spray valve packing gland to be blowing excessively. The valve was backseated and deenergized. The unidentified leak rate was recalculated and recorded as 0.57 GPM which is within the allowable < 1 GPM in accordance with plant technical specifications. When unit was at reduced load, the turbine valve f reedom test was performed.
79-4  (B)  A calculation of the unidentified primary coolant leak rate indicated a    1.95 GPM leak. Reactor power was reduced so that station personnel could enter the containment to evaluate and identify the cause of the leakage. Inspection team found PCV-1455B, a pressurizer spray valve packing gland to be blowing excessively. The valve was backseated and deenergized. The unidentified leak rate was recalculated and recorded as 0.57 GPM which is within the allowable < 1 GPM in accordance with plant technical specifications. When unit was at reduced load, the turbine valve f reedom test was performed.

Latest revision as of 20:34, 1 February 2020

Monthly Operating Rept for Mar 1979
ML19263D720
Person / Time
Site: North Anna Dominion icon.png
Issue date: 04/04/1979
From: Wil Madison
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML19263D713 List:
References
237, NUDOCS 7904130185
Download: ML19263D720 (5)
v • d • e


Text

.

O VIRGINIA ELECTRIC Afl0 POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH nycw YEAR 1979 SUBMITTED:

N3 \ %A SUPERINIEDDENT - OPERATIONS APPROVED:

MANAGER)

YOU413c)(fs'

OPERATING D ATA REPORT DOCKET NO. en-3',

DATE 4-4-79 COMPLETED BY P- "idison TELEPHONE N 4-H94-5151 OPERATING STATUS Notes

1. Unit Name: tinrr h Anna Unie 1
2. Reporting Period: " we'h 1471
3. Licenwd Thermal Power (5 twt):

2775 .

4. Nameplate Rating (Gros Slwe): 947
5. Design Electrical Rating (Net SIWE):907
6. Slaximum Dependable Capacity (Gross 31We):

928

7. Slaximum Dependable Capacity (Net MWe)-

898

8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report. Give Reasons:

tuA

9. Power Level To Which Restricted. If Any (Net 5tWe): "o
10. Reasons For Restrictions,If Any: "n This Month Yr..to-Date Cumulative
11. Hours in Reporting Period 7M4 2. Inn 7.177 711 1.981.? 6,668
12. Number Of Hours Reactor Was Critical
13. Reactor Resene Shutdown Houg o 0 0 eoo n 1,939.9 6,591.6
14. Hours Generator On.Lir
15. Unit Resene Shutdown W trs n n n
16. Gross Thermal Energy Generated (MWH) 1 Ada 166 s 159 675 17 E?.470
17. Gross Electrical Energy Generated (MWH) en* n'n

_. 1,e4n,,1s s, san _nn, 559,410 1,553,280 5,217,860

18. Net Electrical Energy Generated (MWII) 93.9 89.8 91.8
19. Unit Service Factor 93 9 89 8 91 8
20. Unit Availability Factor 83.7 80.1 81.0
21. Unit Capacity Factor (Using MDC Net) 82.9 79.3 80.2
22. Unit Capacity Factor (Using DER Net) 6.1 7.4 3.1
23. Unit Forced Outage Rate
24. Shutdowns Scheduled Over Next 6 Months (Type. Date.and Duration of Each):

c.m u 9m ,a;~ .y 43 in,o , m t.

25. If Shut Down At End Of Report Period. Estimated Date of Startup: Ar i 1 10- 1979
26. Units In Test Status (Prior to Commercial Operation): Forecast Achiesed INITIA L CRITICALITY INITIAL ELECTRICITY COMM ERCIAL OPERATION to/77)

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Paget of 1 UNIT SilUTDOWN AND POWER REDUCTIONS EXPLANATION SIIEET DOCKET No. 50-338 REPORT MONTl! MARCII UNIT NAME NORTil ANNA YEAR _1979 DATE 4-2-79 COMPLETED BY ANDY NEUFER 79-3 (B) llydraulic fluid, used to control the main turbine govenor throttle, reheat and intercept valve began to leak from a joint in the pump discharge header. The unit was shutdown for reweld-ing of the leaking joint. At this time pipe hangers and shock mounts were added to prevent vibration due to pump oscillation (by design) total down time was 11.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

79-3 (4) The reactor was not shut down.

79-4 (B) A calculation of the unidentified primary coolant leak rate indicated a 1.95 GPM leak. Reactor power was reduced so that station personnel could enter the containment to evaluate and identify the cause of the leakage. Inspection team found PCV-1455B, a pressurizer spray valve packing gland to be blowing excessively. The valve was backseated and deenergized. The unidentified leak rate was recalculated and recorded as 0.57 GPM which is within the allowable < 1 GPM in accordance with plant technical specifications. When unit was at reduced load, the turbine valve f reedom test was performed.

79-4 (4) The reactor was not shut down.

79-5 (A)(1) Manual reactor turbine generator trip due to rapid pres-surizer level and pressure drop when the unit was ramped down due to loss of cooling water from "A" reactor coolant pump.

The solenoid on 1-TV-CC-102E burned causing the valve to fail closed. The coil was replacedand the valve was returned to service after testing.

NOTE: Shutdown 79-5 continued through end of March due to failure of turbine reheat stop valve No. 1 left. The valve could not be cycled.

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