ML19317F356: Difference between revisions

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| document report number = NUDOCS 8001140610
| document report number = NUDOCS 8001140610
| package number = ML19317F353
| package number = ML19317F353
| document type = REPORTABLE OCCURRENCE REPORT (SEE ALSO AO,LER), TEXT-SAFETY REPORT
| document type = REPORTABLE OCCURRENCE REPORT (SEE ALSO AO LER), TEXT-SAFETY REPORT
| page count = 3
| page count = 3
}}
}}


=Text=
=Text=
{{#Wiki_filter:(                                     !
{{#Wiki_filter:(
O -
O DUKE POWER COMPA!1Y OC0tlEE flUCLEAR STATION lilCIDENT REPORT CORROS10fl lilVESTIGATION OF UNIT 2 TEND 0!1S NOVEMBER 12, 1973 r
DUKE POWER COMPA!1Y OC0tlEE flUCLEAR STATION lilCIDENT REPORT CORROS10fl lilVESTIGATION OF UNIT 2 TEND 0!1S NOVEMBER 12, 1973 r
8001140d/O
8001140d/O


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                                                                                                    . DUl;E POWER COMPAllY W                                         -0C0 flee flVCLEAa STATION lilCIDEtif REPORT CORROSI0tt INVESTli."\ TION Ol' UNIT ~ 2 TEN 00tlS NOVEMBER 12~, 1973                         q l.0:                   :Introdection
1l
                                -At approxim tely?ll':3'0a.m. on_0ctober 16, 1973, it was discovered that four
. DUl;E POWER COMPAllY
~
W
-0C0 flee flVCLEAa STATION lilCIDEtif REPORT CORROSI0tt INVESTli."\\ TION Ol' UNIT ~ 2 TEN 00tlS NOVEMBER 12~, 1973 q
l.0:
:Introdection
-At approxim tely?ll':3'0a.m. on_0ctober 16, 1973, it was discovered that four
: tendo'ns; mark -31 H31, 31 H32, 31 H33, and 31H34 had not been greased on Uni t. 2
: tendo'ns; mark -31 H31, 31 H32, 31 H33, and 31H34 had not been greased on Uni t. 2
                                ' Reactor Buliding. ;The ungreased. tendons.wcre discovered during an inspection
' Reactor Buliding. ;The ungreased. tendons.wcre discovered during an inspection
                                'for. leaking grease;cdps.
'for. leaking grease;cdps.
                                "Mr.lljanff Jape. of LAEC', Directorate of Regulatory Operations, was .notifled-that-the above_ tendons had not been-frcased. Also, Messrs. J. E. Smith, S.1b. 2 Hager, T. H. McDaniel , D. L. Freeze, D. G. Beam, R. L. Di ck, and W.-S'. Lee we're notified.
"Mr.lljanff Jape. of LAEC', Directorate of Regulatory Operations, was.notifled-that-the above_ tendons had not been-frcased. Also, Messrs. J. E. Smith, S.1b. 2 Hager, T. H. McDaniel, D. L. Freeze, D. G. Beam, R. L. Di ck, and W.-S'. Lee we're notified.
0n'Octoberil'6,;1973, Unit 2 was in the pre-operational test phase with fuel loaded. Zero power physics i.esting had not started.                                             ,
0n'Octoberil'6,;1973, Unit 2 was in the pre-operational test phase with fuel loaded. Zero power physics i.esting had not started.
Scquence of-Eve'nts
- 2.0 Scquence of-Eve'nts See Attachment A 30.
                                  - 2.0 See Attachment A
. Evaluation-
: 30.                 . Evaluation-
- Design Engineering advised.that excessive corrosion was not expected since
                                  - Design Engineering advised.that excessive corrosion was not expected since
:tl.a tendonsLwere coated with-NO-0X-10 500 prior to installation.
:tl.a tendonsLwere coated with-NO-0X-10 500 prior to installation. Since the itime' interval betWeen tendon installation and discovering the ungreased
Since the itime' interval betWeen tendon installation and discovering the ungreased
                                    . tendons was approximately two years,:the_ tendons should be inspected prior to' greasing. Pesign Engineering would provide an inspection procedure s
. tendons was approximately two years,:the_ tendons should be inspected prior to' greasing.
(At.tachmen t : B) .
Pesign Engineering would provide an inspection procedure (At.tachmen t : B).
                                      ;Since-excessive corrosion was not expected, the Reactor: Building was 1 structurally sound. Unit 2 was in the pre-operational test phase and no other structures or systems'were affected by_the ungreased tendons.
s
      ~
;Since-excessive corrosion was not expected, the Reactor: Building was 1 structurally sound.
4.0)                     Corrective'Actlori The ; Construction Department. developcd _ and approved. procedure .183 (At tachment . C)
Unit 2 was in the pre-operational test phase and no other structures or systems'were affected by_the ungreased tendons.
                                        ;from Design. Engineering's procedure for inspecting the,ungreased tendons.
~
4.0)
Corrective'Actlori The ; Construction Department. developcd _ and approved. procedure.183 (At tachment. C)
;from Design. Engineering's procedure for inspecting the,ungreased tendons.
InD. addition,' procedure 187. (Attachment 'D)' was developed and approved to verify
InD. addition,' procedure 187. (Attachment 'D)' was developed and approved to verify
:that the1 remaining Unit.2' Reactor':BuildingLtendons were greased.
:that the1 remaining Unit.2' Reactor':BuildingLtendons were greased.
                                'LTendons . 31 H31,. 31 H32, and 31 H33 were inspected in accordance eith procedure             .
'LTendons. 31 H31,. 31 H32, and 31 H33 were inspected in accordance eith procedure il83'and'foun_d,to be satisfactory. The; inspection. sheets are enclosed in J
il83'and'foun_d,to be satisfactory. The; inspection. sheets are enclosed in J
At ta c hmen t; E.'
At ta c hmen t; E.'
    ~                                   ' Based.upon(the satisfact'ory condition'of the above tendons and physical
~
                                        $1nterferencesLthe inspection procedfure (183) was( revised prior to -inspecting-
' Based.upon(the satisfact'ory condition'of the above tendons and physical
                                        ?  tendon; 31H34; LThefproposed; revision was reviewed by Design- Engineering 'and                 .
$1nterferencesLthe inspection procedfure (183) was( revised prior to -inspecting-tendon; 31H34; LThefproposed; revision was reviewed by Design-Engineering 'and
pg                           _
?
AEC/DRO.,
pg AEC/DRO.,
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Tendon 31111h spc. Inspected in accordance ui th procedure 133, revision 1, dated 10-24-7j, and found to lie sat li.f ac t ory.
Tendon 31111h spc. Inspected in accordance ui th procedure 133, revision 1, dated 10-24-7j, and found to lie sat li.f ac t ory.
Tendens 31!!31, 31!G.', 311133, and 31113 f vere retensienci anil/or grear.cd. /11 acc.cssihic tendons in linit 2 Reactor Duilding uere inspected in accordance with psocedure 137 and found to i.e greased.
f vere retensienci anil/or grear.cd.
50                     Verification The insp:etion of the four ungreased tendons indicated there uns not any corr _osina. da.nage as the resul t of not applying perranent grease                       protection.
/11 Tendens 31!!31, 31!G.', 311133, and 31113 acc.cssihic tendons in linit 2 Reactor Duilding uere inspected in accordance with psocedure 137 and found to i.e greased.
The ten hs ucre restrest.ed to comparabic ar.-found 1if tof f values and
50 Verification The insp:etion of the four ungreased tendons indicated there uns not any corr _osina. da.nage as the resul t of not applying perranent grease protection.
    -great.ed, thereby returning the building to its designed criterion.
values and The ten hs ucre restrest.ed to comparabic ar.-found 1if tof f
All at.cessibin tendrant, in Uni t '' Beactor Coll <!ing uere found to be greased.
-great.ed, thereby returning the building to its designed criterion.
6.0                 Safety,/ gal,yp ,
in Uni t '' Beactor Coll <!ing uere found to be greased.
f    Recurrence has beco climinated by the inspection of all accessible tinit 2 tendons in accordain.;c with procedure 137 70                 .E. nclosu- r- e- -s Attachuent A               Log Sheets Ai i .u .i .-o . T.       i...%iepi i s.qi ne:o r i ns.. Proc. dure             '
All at.cessibin tendrant, 6.0 Safety,/ gal,yp,
          /,ttachecnt C             Construction Procedure 133 Attachment D             Construction Procedure l'17 Attachnent E               Inspection and Prestress Docuracntation Attachnent T               Greasing Documcr tation Attachment L             Tendon filling Docunentalion At t ac! bent 11         Pressure Gage C..libration Sheets Attach acnt l'           Grease DocuiaantnLion i       ,
Recurrence has beco climinated by the inspection of all accessible tinit 2 f
eq                                                                                                   __}}
tendons in accordain.;c with procedure 137 70
.E. nclosu r e s Attachuent A Log Sheets Ai i.u.i.-o. T.
i...%iepi i s.qi ne:o r i ns.. Proc. dure
/,ttachecnt C Construction Procedure 133 Attachment D Construction Procedure l'17 Attachnent E Inspection and Prestress Docuracntation Attachnent T Greasing Documcr tation Attachment L Tendon filling Docunentalion At t ac! bent 11 Pressure Gage C..libration Sheets Attach acnt l' Grease DocuiaantnLion i
eq
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Latest revision as of 21:45, 1 January 2025

Incident Rept, Corrosion Investigation of Unit 2 Tendons. on 731016,tendons Mark 31H31,31H32,31H33 & 31H34 Found Not Greased on Unit 2 Reactor Bldg.Insp Procedure Prepared. Excessive Corrosion Not Expected
ML19317F356
Person / Time
Site: Oconee Duke Energy icon.png
Issue date: 11/12/1973
From:
DUKE POWER CO.
To:
Shared Package
ML19317F353 List:
References
NUDOCS 8001140610
Download: ML19317F356 (3)
v • d • e


Text

(

O DUKE POWER COMPA!1Y OC0tlEE flUCLEAR STATION lilCIDENT REPORT CORROS10fl lilVESTIGATION OF UNIT 2 TEND 0!1S NOVEMBER 12, 1973 r

8001140d/O

m

,( - -

t 1

t

'4 I

1l

. DUl;E POWER COMPAllY

~

W

-0C0 flee flVCLEAa STATION lilCIDEtif REPORT CORROSI0tt INVESTli."\\ TION Ol' UNIT ~ 2 TEN 00tlS NOVEMBER 12~, 1973 q

l.0:

Introdection

-At approxim tely?ll':3'0a.m. on_0ctober 16, 1973, it was discovered that four

tendo'ns; mark -31 H31, 31 H32, 31 H33, and 31H34 had not been greased on Uni t. 2

' Reactor Buliding. ;The ungreased. tendons.wcre discovered during an inspection

'for. leaking grease;cdps.

"Mr.lljanff Jape. of LAEC', Directorate of Regulatory Operations, was.notifled-that-the above_ tendons had not been-frcased. Also, Messrs. J. E. Smith, S.1b. 2 Hager, T. H. McDaniel, D. L. Freeze, D. G. Beam, R. L. Di ck, and W.-S'. Lee we're notified.

0n'Octoberil'6,;1973, Unit 2 was in the pre-operational test phase with fuel loaded. Zero power physics i.esting had not started.

- 2.0 Scquence of-Eve'nts See Attachment A 30.

. Evaluation-

- Design Engineering advised.that excessive corrosion was not expected since

tl.a tendonsLwere coated with-NO-0X-10 500 prior to installation.

Since the itime' interval betWeen tendon installation and discovering the ungreased

. tendons was approximately two years,:the_ tendons should be inspected prior to' greasing.

Pesign Engineering would provide an inspection procedure (At.tachmen t : B).

s

Since-excessive corrosion was not expected, the Reactor
Building was 1 structurally sound.

Unit 2 was in the pre-operational test phase and no other structures or systems'were affected by_the ungreased tendons.

~

4.0)

Corrective'Actlori The ; Construction Department. developcd _ and approved. procedure.183 (At tachment. C)

from Design. Engineering's procedure for inspecting the,ungreased tendons.

InD. addition,' procedure 187. (Attachment 'D)' was developed and approved to verify

that the1 remaining Unit.2' Reactor':BuildingLtendons were greased.

'LTendons. 31 H31,. 31 H32, and 31 H33 were inspected in accordance eith procedure il83'and'foun_d,to be satisfactory. The; inspection. sheets are enclosed in J

At ta c hmen t; E.'

~

' Based.upon(the satisfact'ory condition'of the above tendons and physical

$1nterferencesLthe inspection procedfure (183) was( revised prior to -inspecting-tendon; 31H34; LThefproposed; revision was reviewed by Design-Engineering 'and

?

pg AEC/DRO.,

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, %G

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~

1 e-t s. : "

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~'

M:'. k:L.: O 2. L

_...'3 5

Tendon 31111h spc. Inspected in accordance ui th procedure 133, revision 1, dated 10-24-7j, and found to lie sat li.f ac t ory.

f vere retensienci anil/or grear.cd.

/11 Tendens 31!!31, 31!G.', 311133, and 31113 acc.cssihic tendons in linit 2 Reactor Duilding uere inspected in accordance with psocedure 137 and found to i.e greased.

50 Verification The insp:etion of the four ungreased tendons indicated there uns not any corr _osina. da.nage as the resul t of not applying perranent grease protection.

values and The ten hs ucre restrest.ed to comparabic ar.-found 1if tof f

-great.ed, thereby returning the building to its designed criterion.

in Uni t Beactor Coll <!ing uere found to be greased.

All at.cessibin tendrant, 6.0 Safety,/ gal,yp,

Recurrence has beco climinated by the inspection of all accessible tinit 2 f

tendons in accordain.;c with procedure 137 70

.E. nclosu r e s Attachuent A Log Sheets Ai i.u.i.-o. T.

i...%iepi i s.qi ne:o r i ns.. Proc. dure

/,ttachecnt C Construction Procedure 133 Attachment D Construction Procedure l'17 Attachnent E Inspection and Prestress Docuracntation Attachnent T Greasing Documcr tation Attachment L Tendon filling Docunentalion At t ac! bent 11 Pressure Gage C..libration Sheets Attach acnt l' Grease DocuiaantnLion i

eq

__

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