ML20202E176
| ML20202E176 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 06/30/1986 |
| From: | Wenzinger E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Randazza J Maine Yankee |
| Shared Package | |
| ML20202E181 | List: |
| References | |
| NUDOCS 8607140301 | |
| Download: ML20202E176 (2) | |
See also: IR 05000309/1986008
Text
. _ .
. - - .
_ _ _ - - - - _
_ _ _ _ _ _ _ _ _ _ - _ _ - _ - _ _ _ _ _ _
l
'
..
,
'
330 W
Docket / License: 50-309/DPR-36
Maine Yankee Atomic Power Company
ATTN:
Mr. J.B. Randazza
Vice President
Nuclear Operations
83 Edison Drive
Augusta, Maine 04336
Gentlemen:
Subject:
Inspection Report No. 50-309/86-08
This transmits the May 11 - June 16, 1986 routine inspection findings of Messrs.
C. Holden, J. Robertson and other region-based inspectors, of the Maine Yankee
Atomic Power Plant, Wiscasset, Maine.
Those findings were based on observations
of activities, interviews, and document reviews, and have been discussed with
Mr. Garrity of your staff.
Within the scope of this inspection, no violations were observed.
Even though your
post trip review process did not find any conclusive evidence of the cause of the
failure of the Excess Flow Check Valve rupture disk, we observed the review process
to be thorough.
Although not safety related, we found the pressure switch in the raw water to the
"B" service water pump bearing to be isolated (see Section 4.b of enclosed report).
Also, we understand that your staff has identified another isolated non-safety re-
lated pressure switch since the end of this inspection report period.
Isolation
of safety instrumentation that was a part of the reactor protection system (trip
on high steam generator pressure) was the subject of Violation 85-27-01 and subse-
quent escalated enforcement action.
I am concerned that these 2 recent instances
of isolated instruments may be indications of weaknesses in your corrective actions
for Violation 85-27-01.
Please address measures that are being taken to address
these isolation problems at Maine Yankee in your response to this lettor.
The re-
sponse directed by this letter is not subject to the clearance procedures of the
Office of Management and Budget as required by the Paperwork Reduction Act of 1980,
PL 96-511.
Your continued cooperation with us in this matter is appreciated.
Si m..re ly ,
vraginal Signed 830
h
Edward C. Wenzinger, Chief
Projects Branch No. 3
Division of Reactor Projects
Enclosure:
NRC Region I Inspection Report No. 50-309/86-08
8607140301 860630
ADOCK 0500
9
/
gDR
-.
-
---
_-
- _ - _ .
. . _ .
.
- _ _
.
. _ _
_
._
_
._
_
. _ _ . .
. _ .
.
_
'
..
.
Maine Yankee Atomic Power Company
2
JUN 3 01996
,
cc w/ encl:
C.E. Monty, President
C.D. Frizzle, Assistant Vice President / Manager of Operations
.
J.H. Garrity, Plant Manager
,
P.L. Anderson, Project Manager
G.D, Whittier, Licensing Section Head
J.A. Ritsher, Attorney (Ropes and Gray)
Public Document Room (PDR)
local Public Document Room (LPDR)
Nuclear Safety Information Center (NSIC)
NRC Resident Inspector
State of Maine (2)
,
bec w/ encl:
Region I Docket Room (with concurrences)
Management Assistant, DRMA (w/o encl.)
DRP Section Chief
M. McBride, RI, Pilgrim
a
H. Eichenholz, SRI, Yankee
P. Sears, LPM, NRR
,
i
4
4
4
,
1
i
1
4
i
Rf
R
j
'obertson
olden
ip
Wonzin er
)
J
b
k
l0
I
0FFICIAL RECORD COPY
l
w / Mz o e --
r.
6/3.l F L
,
!
. .
- - . . . .
.
- - .
.-
- - . - -
-. ..
_
, , , . ,
- - . . . _ , .
-
---
c,.
-
-