ML17252A226: Difference between revisions
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| number = ML17252A226 | | number = ML17252A226 | ||
| issue date = 09/30/1976 | | issue date = 09/30/1976 | ||
| title = | | title = Letter Submitting Reportable Occurrence Number 050-249/1976-17 in Accordance with Technical Specifications, Section 6.6.B | ||
| author name = Stephenson | | author name = Stephenson B | ||
| author affiliation = Commonwealth Edison Co | | author affiliation = Commonwealth Edison Co | ||
| addressee name = Keppler J | | addressee name = Keppler J | ||
| addressee affiliation = NRC/RGN-III | | addressee affiliation = NRC/RGN-III | ||
| docket = 05000237, 05000249 | | docket = 05000237, 05000249 | ||
Line 14: | Line 14: | ||
| page count = 3 | | page count = 3 | ||
}} | }} | ||
=Text= | =Text= | ||
{{#Wiki_filter: | {{#Wiki_filter:. .,fommori'4th Edison . | ||
.:;;.cOresden Nuclear .Power Station. | |||
N*R.R. #1 0 Morris, Illinois 60450 Telephone 815/942-2920 | |||
}} | *~* | ||
BBS Ltr. '#76- 702 September 30, 1976* | |||
Mr. James G.. Keppler, Regional Director Directorate of Regulatory Operations - Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road ** | |||
Glen Ellyn, Illinois 60137 Enclosed please find Reportable Occurrence*report number 50-249/1976-17. | |||
*This report is being'submitted to your office in. accordance with the Dresden | |||
.Nuclear Power Station Technical Specifications~ Section 6.6.B. | |||
ens on Superintendent. | |||
Dres"den Nuclear Power Station BBS:jo | |||
*.;.~Enclosure. | |||
cc:. Director of Inspection &.Enforcement Director of Management Information & Prog_ram Control . | |||
File/NRC | |||
. ' .. ~ : . | |||
.REGULATORY.DOCKET FILE COPV | |||
t'' | |||
-- -_ LICENSEE EVENT REPORT - | |||
.* : :~)"'... CONTRO~'.:BLOC1<'\ | |||
. ' 1.,. I I I J. . .. 'LEASE PRINT ALL REQUIRED INFORMATION) | |||
'I>* _ , UcENSEE . < -- LICENSE EVENT | |||
- NAME ' __ '_LICENSE NUMBER* TYPE - TYPE- - | |||
@E] IIILl.Pl'RISl3 I 15 10101~10101010101-10101 IJ/*11It11111 101 f I | |||
-- 7 -8 9 - : - ,;; *14 - - .,, - '25 -- - 26_ -- .. 30 .31 - 32 REPORT REPORT CATEGORY TYPE - SOURCE DOCKET NUMBER - EVENT DATE - REPORT DATE I I I tCJ IOl5l017IOl~l~f,I Io Ic:t I / I'6 17 I C74I _I75::-;-- 0 Iq 131 o -17 I lz.J 59<< . - lbJ | |||
- :@E]coN'T 1 -_0 57 58 60 61 68 69 _-- 80 . | |||
___ EVENT DESCRIPTiON 10'21.I AT 1'1l.5 -110URS ON t:tjt'lj7b 1 1)E-IN£RTrNG- OF" THE:"DR'IWEU- WAS-BEGUN IN I 7 8 9 -- - - -- - - - - - 80 10'31 I AA/TtCIPffflOJV OF THE SCH£DULE:D IJNIT SHUTDOWN FOR 1<EFU£).JNG-. AC -I 7 - _*-0 "9 - * . - *- - _ 00 | |||
-lo141 7 8 9 lc.o~DtNG- TO SEC-T10N 3.7. A. 5. 'B OF" Tl-4£ T£CHNIGAL. .S-PEC1F1c.11.rro/IJS ])Ry- | |||
- _ _- _ _, BO I | |||
____ . lol51 !WELL '])£*JN£"R::rtNG- fVIAY CfJ'i>1M£NG£ J.,4 HOURS PRIOR. TO A SHUTl>OWN. I *_ | |||
-7 8 *9 - - - - - - - - - 80 | |||
~ I Tf-lc. 'D1<.'IW£LL 0'1.VGEN. C:O.iVC.£NTRATION E)(CEEDED .I./ Ofo AT APPROX.I MATELV f 7 -8 9 > - * * - - PRIME (Sfi~ mt!Vni:f) .SHe::r)SD - | |||
SYSTEM CAUSE COMPONENT COMPONENT | |||
- . CODE . CODE COMPONENT CODE . SUFPUEtl - MANUFACTUF\ER - VIOlATXlN | |||
- *~. [§0 ISIAI | |||
-. - 7 8 9 *10 -- - | |||
LE.J 11 IZ.IZlZIZIZIZI 12 - 17 - | |||
-l£j 43 44 IZt91'1.dqJ _ lYJ 47 : - 48 | |||
-_ - ~ALISE DESCRiP,Tl0N _ _ _ _ _ _ __ _ __ _ _ _ _ _ _ | |||
~~I 1w ORDER io sltirsFy fYJ1N1muWJ, SY.sritM J...iYAD 'R.£QUtR£r1rc-N{S. UN1T~3 I.- | |||
1 8 9 - - - -- - - - - -__ -- '-.*. - . - - - - - -. - y - - 80 - | |||
. lol9Ll'w1ts *wor-*** SHUT' TJOWJJ WITHIN 14./-£:0..if,~ HOUR'- P.f1<10D-suBs-~Qui:NT To J)RYWEl..L J: - | |||
. 7 . 8 9 - - -- - - - - .* - - 80 - | |||
-.. /.[!:@*l*UE~.aNERTl.N.G-~ . SPtf"E'TY,.l.~Pl-ICA.TlotJS. ~,,WE;R£,.-}';J.04:::,ffiORE:E;$f.G:N;f:E:JGAN'T~::.m.:HAN.~~-JF:,... J- | |||
.>-. --. ',:'<~.; | |||
..-,Q- . 9. * -.-. FACILITY | |||
*: - . . - . - <METH*O--D-OF- - - -- (Sef; A-rtAC.!t£D*SHcutf) BO_* | |||
-" *. - .. - ._ STATUS "' POWER OTHER STATUS 'DISCOVER';: - - DISCOVERY DESCRIPT:ON | |||
[ill] (QJ Io 17 I 3 I I Nit I lAJ -1.._ _ __._M. . .fl...__. . . __ -_ -~..----.....-11 1 e s | |||
-FORM- OF 10 12 13 44 45* 46 80 | |||
.' . *-:* . . ACTIVITY -- cmlTENT - - | |||
__ :l:l -Rilz.sr~-: OF izf-~Er* _ _AMOUNT °JJ~CTIVITY ,, . , | |||
1 __ 1 -NALOCATION OF RELEASE 1-1-----~._,...,.,,,;::,...._:- - 4 4 -- *** 4~5_..,......---.--...........,..-....,....,.... . . . . ____,_.;.,,.--___---'001 | |||
* 11 1 -- a * ,~ --** 10 PERSONNEL.E)(POSURES | |||
* -* - - NUMBER - TYPE 0El3CRIP.TION | |||
. (!21 :j'OlD.10 I ...'l6J I NA -..... - .. I | |||
_1 _e s 11 12 13 80 - | |||
. PERS.ONNEL INJURIES NUMBER DESCRIPTION ff8 IOI OIOll~_-___ M_'A_ _...,...__~_ _____,_ _ _ _ _ _ _ _ ___,I | |||
*_,...... 1 es 11 12 . . ": 00 | |||
_OFFSJTE CONSEQUENCES Elfil -Al11 - 80 - | |||
. 7 - 89 LOSS 'O_R DAMAGE TO FACILITY | |||
* TYPE | |||
* DESCRIPTION Efil *IZ.J -.10 - | |||
1 0* s - | |||
NI/ | |||
80 | |||
- ./- | |||
.PUBLiciTY (ill] NA 7 8 9 80 ADDITIONAL FACTORS | |||
fl.~. . ~, | |||
. * .. ' :~ | |||
EVENT DESCRIPT!ON (Continued) 2030 hours~ At 0200 hours on 9-19-76, the unit load drop was halted at the direction of the Chicago load dispatcher because of a system emergency. . | |||
.* Dr)'Weil. inerting *was begun at 0415 hours; *by 0600 ,- the dr-iwell oxygen con- * | |||
* centrad.on had d:ropped below 4%. A similar event occurred on Unit-2 in | |||
.J:une, 1975. (50-249/1976-17) | |||
CAUSE DESCRIPTION (Continued) the unit.had been actually shut down, since the drywell oxygen concentration exceeded 4% for.~ less than 24 hours. As stated above, an acceptable drywell oxygen concentration was achieved by 0600 hours on 9-19-76. No further action was considered appropriate. | |||
b*..}} |
Latest revision as of 09:08, 24 February 2020
ML17252A226 | |
Person / Time | |
---|---|
Site: | Dresden |
Issue date: | 09/30/1976 |
From: | Stephenson B Commonwealth Edison Co |
To: | James Keppler NRC/RGN-III |
References | |
BBS Ltr. #76-750 | |
Download: ML17252A226 (3) | |
Text
. .,fommori'4th Edison .
.:;;.cOresden Nuclear .Power Station.
N*R.R. #1 0 Morris, Illinois 60450 Telephone 815/942-2920
- ~*
BBS Ltr. '#76- 702 September 30, 1976*
Mr. James G.. Keppler, Regional Director Directorate of Regulatory Operations - Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road **
Glen Ellyn, Illinois 60137 Enclosed please find Reportable Occurrence*report number 50-249/1976-17.
- This report is being'submitted to your office in. accordance with the Dresden
.Nuclear Power Station Technical Specifications~ Section 6.6.B.
ens on Superintendent.
Dres"den Nuclear Power Station BBS:jo
- .;.~Enclosure.
cc:. Director of Inspection &.Enforcement Director of Management Information & Prog_ram Control .
File/NRC
. ' .. ~ : .
.REGULATORY.DOCKET FILE COPV
t
-- -_ LICENSEE EVENT REPORT -
.* : :~)"'... CONTRO~'.:BLOC1<'\
. ' 1.,. I I I J. . .. 'LEASE PRINT ALL REQUIRED INFORMATION)
'I>* _ , UcENSEE . < -- LICENSE EVENT
- NAME ' __ '_LICENSE NUMBER* TYPE - TYPE- -
@E] IIILl.Pl'RISl3 I 15 10101~10101010101-10101 IJ/*11It11111 101 f I
-- 7 -8 9 - : - ,;; *14 - - .,, - '25 -- - 26_ -- .. 30 .31 - 32 REPORT REPORT CATEGORY TYPE - SOURCE DOCKET NUMBER - EVENT DATE - REPORT DATE I I I tCJ IOl5l017IOl~l~f,I Io Ic:t I / I'6 17 I C74I _I75::-;-- 0 Iq 131 o -17 I lz.J 59<< . - lbJ
- :@E]coN'T 1 -_0 57 58 60 61 68 69 _-- 80 .
___ EVENT DESCRIPTiON 10'21.I AT 1'1l.5 -110URS ON t:tjt'lj7b 1 1)E-IN£RTrNG- OF" THE:"DR'IWEU- WAS-BEGUN IN I 7 8 9 -- - - -- - - - - - 80 10'31 I AA/TtCIPffflOJV OF THE SCH£DULE:D IJNIT SHUTDOWN FOR 1<EFU£).JNG-. AC -I 7 - _*-0 "9 - * . - *- - _ 00
-lo141 7 8 9 lc.o~DtNG- TO SEC-T10N 3.7. A. 5. 'B OF" Tl-4£ T£CHNIGAL. .S-PEC1F1c.11.rro/IJS ])Ry-
- _ _- _ _, BO I
____ . lol51 !WELL '])£*JN£"R::rtNG- fVIAY CfJ'i>1M£NG£ J.,4 HOURS PRIOR. TO A SHUTl>OWN. I *_
-7 8 *9 - - - - - - - - - 80
~ I Tf-lc. 'D1<.'IW£LL 0'1.VGEN. C:O.iVC.£NTRATION E)(CEEDED .I./ Ofo AT APPROX.I MATELV f 7 -8 9 > - * * - - PRIME (Sfi~ mt!Vni:f) .SHe::r)SD -
SYSTEM CAUSE COMPONENT COMPONENT
- . CODE . CODE COMPONENT CODE . SUFPUEtl - MANUFACTUF\ER - VIOlATXlN
- *~. [§0 ISIAI
-. - 7 8 9 *10 -- -
LE.J 11 IZ.IZlZIZIZIZI 12 - 17 -
-l£j 43 44 IZt91'1.dqJ _ lYJ 47 : - 48
-_ - ~ALISE DESCRiP,Tl0N _ _ _ _ _ _ __ _ __ _ _ _ _ _ _
~~I 1w ORDER io sltirsFy fYJ1N1muWJ, SY.sritM J...iYAD 'R.£QUtR£r1rc-N{S. UN1T~3 I.-
1 8 9 - - - -- - - - - -__ -- '-.*. - . - - - - - -. - y - - 80 -
. lol9Ll'w1ts *wor-*** SHUT' TJOWJJ WITHIN 14./-£:0..if,~ HOUR'- P.f1<10D-suBs-~Qui:NT To J)RYWEl..L J: -
. 7 . 8 9 - - -- - - - - .* - - 80 -
-.. /.[!:@*l*UE~.aNERTl.N.G-~ . SPtf"E'TY,.l.~Pl-ICA.TlotJS. ~,,WE;R£,.-}';J.04:::,ffiORE:E;$f.G:N;f:E:JGAN'T~::.m.:HAN.~~-JF:,... J-
.>-. --. ',:'<~.;
..-,Q- . 9. * -.-. FACILITY
- - . . - . - <METH*O--D-OF- - - -- (Sef; A-rtAC.!t£D*SHcutf) BO_*
-" *. - .. - ._ STATUS "' POWER OTHER STATUS 'DISCOVER';: - - DISCOVERY DESCRIPT:ON
[ill] (QJ Io 17 I 3 I I Nit I lAJ -1.._ _ __._M. . .fl...__. . . __ -_ -~..----.....-11 1 e s
-FORM- OF 10 12 13 44 45* 46 80
.' . *-:* . . ACTIVITY -- cmlTENT - -
__ :l:l -Rilz.sr~-: OF izf-~Er* _ _AMOUNT °JJ~CTIVITY ,, . ,
1 __ 1 -NALOCATION OF RELEASE 1-1-----~._,...,.,,,;::,...._:- - 4 4 -- *** 4~5_..,......---.--...........,..-....,....,.... . . . . ____,_.;.,,.--___---'001
- 11 1 -- a * ,~ --** 10 PERSONNEL.E)(POSURES
- -* - - NUMBER - TYPE 0El3CRIP.TION
. (!21 :j'OlD.10 I ...'l6J I NA -..... - .. I
_1 _e s 11 12 13 80 -
. PERS.ONNEL INJURIES NUMBER DESCRIPTION ff8 IOI OIOll~_-___ M_'A_ _...,...__~_ _____,_ _ _ _ _ _ _ _ ___,I
- _,...... 1 es 11 12 . . ": 00
_OFFSJTE CONSEQUENCES Elfil -Al11 - 80 -
. 7 - 89 LOSS 'O_R DAMAGE TO FACILITY
- TYPE
- DESCRIPTION Efil *IZ.J -.10 -
1 0* s -
NI/
80
- ./-
.PUBLiciTY (ill] NA 7 8 9 80 ADDITIONAL FACTORS
fl.~. . ~,
. * .. ' :~
EVENT DESCRIPT!ON (Continued) 2030 hour0.0235 days <br />0.564 hours <br />0.00336 weeks <br />7.72415e-4 months <br />s~ At 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> on 9-19-76, the unit load drop was halted at the direction of the Chicago load dispatcher because of a system emergency. .
.* Dr)'Weil. inerting *was begun at 0415 hours0.0048 days <br />0.115 hours <br />6.861772e-4 weeks <br />1.579075e-4 months <br />; *by 0600 ,- the dr-iwell oxygen con- *
- centrad.on had d:ropped below 4%. A similar event occurred on Unit-2 in
.J:une, 1975. (50-249/1976-17)
CAUSE DESCRIPTION (Continued) the unit.had been actually shut down, since the drywell oxygen concentration exceeded 4% for.~ less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. As stated above, an acceptable drywell oxygen concentration was achieved by 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> on 9-19-76. No further action was considered appropriate.
b*..