PNO-III-87-113A, updates Util Evaluation of Defective & Incorrectly Installed Bolts in Facility Containment Access Area.Caused by Use of Improper Cutting & Welding Procedure. Evaluation Continuing: Difference between revisions

From kanterella
Jump to navigation Jump to search
VisualWikitext
StriderTol Bot insert
 
StriderTol Bot change
 
Line 14: Line 14:
| page count = 1
| page count = 1
}}
}}
{{#Wiki_filter:_         -_          _ _ .
{{#Wiki_filter:_
bot Po PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PRO-III-87-113A Date September 3, 1987 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety                                 ;
bot Po PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PRO-III-87-113A Date September 3, 1987 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.
or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III
Facility:
,  staff on this date.
Indiana & Michigan Electric Co.
>  Facility:   Indiana & Michigan Electric Co.             Licensee Emergency Classification:
Licensee Emergency Classification:
D. C. Cook Unit 2                                 Notification of an Unusual Event                   j Stevensville, MI 49127                             Alert                                               !
D. C. Cook Unit 2 Notification of an Unusual Event j
Site Area Emergency Docket No. 50-316                                 General Emergency                                   i X Not Applicable l  
Stevensville, MI 49127 Alert Site Area Emergency Docket No. 50-316 General Emergency i
X Not Applicable l  


==Subject:==
==Subject:==
DEFECTIVE REACTOR COOLANT Pl!MP HATCH BOLTS----(UPDATE)
DEFECTIVE REACTOR COOLANT Pl!MP HATCH BOLTS----(UPDATE)
The licensee is continuing its evaluation of defective and incorrectly installed bolts on the hatch covers which provide access from the upper containw. ant to the reactor coolant pumps areas of the lower containment. Both units are affected -- Unit 1 is in a refueling outage and Unit 2 was shut down on August 27, 1987.
The licensee is continuing its evaluation of defective and incorrectly installed bolts on the hatch covers which provide access from the upper containw. ant to the reactor coolant pumps areas of the lower containment.
Each unit has four hatch covers, each providing access to a reactor coolant pump. The
Both units are affected -- Unit 1 is in a refueling outage and Unit 2 was shut down on August 27, 1987.
,  licensee's inspection determined that for Unit 1 the bolts are correctly installed on one l hatch cover, five of the 18 bolts were not installed properly on the second, two of 19 were i  not installed on the third, and one of the 19 was not installed on the fourth hatch cover.
Each unit has four hatch covers, each providing access to a reactor coolant pump. The licensee's inspection determined that for Unit 1 the bolts are correctly installed on one l hatch cover, five of the 18 bolts were not installed properly on the second, two of 19 were not installed on the third, and one of the 19 was not installed on the fourth hatch cover.
l On t! nit 2 tive of 18 bolts were not properly installed on one cover, three of 18 were not l preserly installed on the second,14 of 19 were not properly installed on the third, and
i l On t! nit 2 tive of 18 bolts were not properly installed on one cover, three of 18 were not l preserly installed on the second,14 of 19 were not properly installed on the third, and
) four of 19 were not properly installed on the fourth.
) four of 19 were not properly installed on the fourth.
l l
l l The faulty installations generally involve cutting and welding of the bolts during the original installation. This procedure, when used, differs from the installation drawings.
The faulty installations generally involve cutting and welding of the bolts during the i
i The licensee is continuing to evaluate the potential effects of the improper bolt installations to determine if modifications are necessary. While these evaluations are unoerway, the licensee has decided to conduct Unit 2 steam generator eddy current testing and ice condenser surveillance, which was previously planned for a 40-day outage beginning in October.
original installation. This procedure, when used, differs from the installation drawings.
The licensee is continuing to evaluate the potential effects of the improper bolt installations to determine if modifications are necessary. While these evaluations are unoerway, the licensee has decided to conduct Unit 2 steam generator eddy current testing and ice condenser surveillance, which was previously planned for a 40-day outage beginning in October.
The resident inspectors will monitor the licensee's review of the hatch cover bolts and other outage activities.
The resident inspectors will monitor the licensee's review of the hatch cover bolts and other outage activities.
The State of Michigan will be notified.
The State of Michigan will be notified.
This updated information is current as of 10 a.m., e temb                       3, 1987.           2 CDy W CONTACT:   B. Burgess ('FTS 388-5689)                 W. Guide       d(f/FTS 388 574)
This updated information is current as of 10 a.m.,
e temb 3, 1987.
2 CDy W d(f/
CONTACT:
B. Burgess ('FTS 388-5689)
W. Guide FTS 388 574)
DISTRIBUTION:
DISTRIBUTION:
!  H. St.                     EDO       NRR           E/W           Willste         Mail: ADM:DMB Chairman Zech               PA                       IE             NMSS                     DOT:Trans only Comm. Roberts               ELD                       OIA           RES i Comm. Bernthal                                         AE0D                           NRC Ops Ctr ,356 4 Comm. Carr Comm. Rogers l ACRS                         SP 3'. Ll$       Reg,ippal ,0ffices           '; 4'
H. St.
                                                            ~   '
EDO NRR E/W Willste Mail: ADM:DMB Chairman Zech PA IE NMSS DOT:Trans only Comm. Roberts ELD OIA RES i Comm. Bernthal AE0D NRC Ops Ctr,356 4 Comm. Carr Comm. Rogers l ACRS SP 3'. Ll$
SECY l CA                           INP0?/$O                 NSAC,$'6l-PDR RIIIResidentOffic[e Licensee:     .2i. <;           (Corp. Office - Reactor Lic. Only)
Reg,ippal,0ffices
                                                                                                        &    (
'; 4 SECY
8709o9Q30B70903 PDR   y Region III 1f f PNO-2II_87-113 PDR                                                           Rev. August 1987 h-_
~
l CA INP0?/$O NSAC,$'6l-RIIIResidentOffic[e PDR Licensee:
.2i. <;
(Corp. Office - Reactor Lic. Only)
(
8709o9Q30B70903 PDR y
1f f PNO-2II_87-113 PDR Region III Rev. August 1987 h-_
t
t


V
V
                                        . ' b 4 /"'                                                                     <
. ' b
e<                                          '
/"'
                                                                                                        ; {     1;
4
{                                                                          .l                             /-                 s. . , . ,
{
_ ,5 r                                                                             ,                                    ,
1; e <
                                                                                                                        -b r
.l
/-
s.
{
_,5 r
- b r
/
/
s
s
  'l ,
'l,
d k
d k
A.
A.
                  < y n
< y n
I k
I k
f       f                       N q                       s 1
N f
1     (                                                                                 .
f q
A Ljf               ' f. g r
s 1
                          ^l                           i l
1
h r! -
(
                      /:
A Ljf
                                                                                                                                                      .I i
' f.
                                                        / j e t M
g i
                                                                      ,                      itt 6 V 8- d3S 121 S0-08HSA 4
^ l r
        ;)
l h /:
r! -
.I i
/
j e
t M
itt 6 V 8-d3S 121 S0-08HSA 4
;)
x
x
_ _ . _ _ _ _}}
_ _. _ _ _ _}}


{{PNO-Nav|region=III}}
{{PNO-Nav|region=III}}

Latest revision as of 06:03, 2 December 2024

PNO-III-87-113A:updates Util Evaluation of Defective & Incorrectly Installed Bolts in Facility Containment Access Area.Caused by Use of Improper Cutting & Welding Procedure. Evaluation Continuing
ML20238A530
Person / Time
Site: Cook  
Issue date: 09/03/1987
From: Burgess B, Guldemond W
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-87-113A, NUDOCS 8709090330
Download: ML20238A530 (1)
v • d • e


_

bot Po PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PRO-III-87-113A Date September 3, 1987 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.

Facility:

Indiana & Michigan Electric Co.

Licensee Emergency Classification:

D. C. Cook Unit 2 Notification of an Unusual Event j

Stevensville, MI 49127 Alert Site Area Emergency Docket No. 50-316 General Emergency i

X Not Applicable l

Subject:

DEFECTIVE REACTOR COOLANT Pl!MP HATCH BOLTS----(UPDATE)

The licensee is continuing its evaluation of defective and incorrectly installed bolts on the hatch covers which provide access from the upper containw. ant to the reactor coolant pumps areas of the lower containment.

Both units are affected -- Unit 1 is in a refueling outage and Unit 2 was shut down on August 27, 1987.

Each unit has four hatch covers, each providing access to a reactor coolant pump. The licensee's inspection determined that for Unit 1 the bolts are correctly installed on one l hatch cover, five of the 18 bolts were not installed properly on the second, two of 19 were not installed on the third, and one of the 19 was not installed on the fourth hatch cover.

i l On t! nit 2 tive of 18 bolts were not properly installed on one cover, three of 18 were not l preserly installed on the second,14 of 19 were not properly installed on the third, and

) four of 19 were not properly installed on the fourth.

l l The faulty installations generally involve cutting and welding of the bolts during the original installation. This procedure, when used, differs from the installation drawings.

i The licensee is continuing to evaluate the potential effects of the improper bolt installations to determine if modifications are necessary. While these evaluations are unoerway, the licensee has decided to conduct Unit 2 steam generator eddy current testing and ice condenser surveillance, which was previously planned for a 40-day outage beginning in October.

The resident inspectors will monitor the licensee's review of the hatch cover bolts and other outage activities.

The State of Michigan will be notified.

This updated information is current as of 10 a.m.,

e temb 3, 1987.

2 CDy W d(f/

CONTACT:

B. Burgess ('FTS 388-5689)

W. Guide FTS 388 574)

DISTRIBUTION:

H. St.

EDO NRR E/W Willste Mail: ADM:DMB Chairman Zech PA IE NMSS DOT:Trans only Comm. Roberts ELD OIA RES i Comm. Bernthal AE0D NRC Ops Ctr,356 4 Comm. Carr Comm. Rogers l ACRS SP 3'. Ll$

Reg,ippal,0ffices

'; 4 SECY

~

l CA INP0?/$O NSAC,$'6l-RIIIResidentOffic[e PDR Licensee:

.2i. <;

(Corp. Office - Reactor Lic. Only)

(

8709o9Q30B70903 PDR y

1f f PNO-2II_87-113 PDR Region III Rev. August 1987 h-_

t

V

. ' b

/"'

4

{

1; e <

.l

/-

s.

{

_,5 r

- b r

/

s

'l,

d k

A.

< y n

I k

N f

f q

s 1

1

(

A Ljf

' f.

g i

^ l r

l h /:

r! -

.I i

/

j e

t M

itt 6 V 8-d3S 121 S0-08HSA 4

)

x

_ _. _ _ _ _

Retrieved from "https://kanterella.com/w/index.php?title=PNO-III-87-113A,_updates_Util_Evaluation_of_Defective_%26_Incorrectly_Installed_Bolts_in_Facility_Containment_Access_Area.Caused_by_Use_of_Improper_Cutting_%26_Welding_Procedure._Evaluation_Continuing&oldid=3920217"