ML16341B434
| ML16341B434 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/15/1980 |
| From: | Elin J, Haynes R, Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML16341B435 | List: |
| References | |
| 50-275-80-16, 50-323-80-08, 50-323-80-8, NUDOCS 8010230077 | |
| Download: ML16341B434 (14) | |
See also: IR 05000275/1980016
Text
50-275/80-16
Report
No.
Docket
No
50,275/50
232
U. S.
NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
REGION V
.cense
No
CPPR-39'PPR-69
Safeguards
Group
Pacific
Gas
and Electric Company
77 Beale Street
San Francisco,
94106
Faci1ity Name;
Diablo Canyon Units
1 and
2
Inspection at:
Diablo Canyon Site,
San Luis Obispo County, California
Inspection conducted:
August 12 - 15,
1980
Inspectors:
Ff fir.scg
Reactor
Inspector
~ J.
0. Elin, Reactor'nspector
Date Signed
Date Signed
Approved By:
Date Signed
tx- 8o
Date Signed
50-323/80-08
~At<<d:
R
di
p
i
by
gi
1b
di
p
of construction
and modification activities including:
licensee
actions
on
previous irispection findings and 50.55(e)
items; Unit
1 modifications per the
TMI Short Term Lessons
Learned
Requirements;
followup on IE Bulletins and
Circulars;
gA audits review,
and nonconformance
report review.
The inspection
'nvolved 44 inspector
hours onsite
by two
NRC inspectors.
Results:
No items of noncompliance
or deviations
were identified.
C. Haynes,~Chi
4, Projects
Section
Reactor Construction
and Engineering, Support
Branch
Summary:
Ins ection durin
eriods of Au ust 12-15,
1980
Re ort Nos.
50-275 80-16 and
+77
8.'oioep9:,,g
RV Form 219 (2)
DETAILS
1.
Individual s Contacted
a.
Pacific
Gas
and Electric
Com an
PGRE
- D. A. Rockwell, Acting Project Superintendent
- M. E.
Leppke,
Resident
Mechanical
Engineer
- R. Twiddy, gA Supervisor
- S. J.
Foat, Acting gC Coordinator
- G. L. Johnson,
gC Inspector
- I. L. MacDonald, Scheduling
Engineer
Irl. Raymond,
Manager guality Assurance
Various other
gC and construction
engineering
personnel.
b.
H.
P.
Foie
, Co.
Foie
J.
Thompson, Acting gA Manager
Various other
gC and crafts personnel.
c.
Pullman
Power Products
PPP
Two crafts personnel
(welder and helper).
d.
Other Personnel
- T. Young,
NRC Senior Resident
Inspector
- M. J. Bagaglio,
tlRC Resident
Inspector
- Exit Interview Attendees
2.
Site Tour
Upon arrival
on site the inspectors
toured the facility to observe
in-process
and completed work activities to ascertain
general
compliance
with regulatory requirements,
codes,
standards
and procedures.
Activities examined included:
a) reinforcing steel installation,
concrete
preplacement activities
and formwork for the Technical
Support Center
and
remote sampling facility, b) selected
support
and electrical
panel installations for the internal
and external
recombiner
systems,
c) selected
raceway installations for
the
new auxiliary feedwater flow control valve operators,
and (d)
in-process
IE Bulletin 79-02 modifications to add stiffener plates
to base plates
attached
to concrete with concrete
anchors.
Discussions
with crafts personnel
engaged
in the addition of stiffener
plates
to base plates
indicated that apparently
the Pullman
Power
Products
procedures
affecting these modifications did not require
releasing
the torque
on the concrete
anchor bolts prior to welding
the stiffener plates in place.
The inspector brought this concern
to the attention of responsible
licensee
management.
The licensee
took the following corrective actions:
(a) Pullman was instructed to
place
a note
on all affected modification drawings requiring that the
be released
on concrete
anchor bolts prior to baseplate
welding,
(b) Pullman would issue
a
PGSE approved
gA instruction requiring the
release
of anchor bolt torque prior to baseplate
welding to assure
concrete anchor integrity, (c) the contents of the gA instruction
would be incorporated into the Pullman procedures
upon the next
revision and (d) a reinspection of all previously completed
baseplates
and concrete
anchor bolts, modified in response
would be accomplished
and documented.
Pullman
had included requirements
for releasing
anchor bolt torque in previous
programs
and
has
procedures
in effect requiring
gC verification of torque for bolting activities.
The implementation of the licensee's
actions will be examined during
a future inspection.
(275/80-16-01).
The inspector also examined
the receiving inspection reports
and
certified material test reports for two heats of No.
8 rebar
and
one heat of No.
10 rebar.
The rebar storage
and hold areas
appeared
to be well marked
and segregated
with all rebar on dunnage.
No items of noncompliance or deviations
were identified.
Licensee
Action on Previous .Enforcement
Items
Closed
(275/80-10-05
Deficienc:
Failure to document electrical
racewa
su
ort ins ections
as re uired
b
rocedure.
The licensee's
response
to the specific item of noncompliance
was
submitted
by
PGLE letter dated
June
17, 1980.
The inspector
examined
the specified corrective actions to verify implementation
and sampled
about
10 conduit installations to verify compliance with procedure
specified requirements.
No items of noncompliance
or deviations
were
identified.
Licensee Action on Previousl
Identified Followu
Items
a.
Closed
275/80-10-02
Followu
Item:
Site Mechanical
En ineerin
Instructions
(SNEI
did not reflect code re uirements
The inspector
had identified that certain licensee
procedures
appeared
to be overly restrictive in the area of weld reinforcement
and inspectors
were using code specified requirements
instead of
procedural
specified criteria for weld inspection
on the external
recombiner
system.
0
b.
The licensee
had reviewed the
SMEI procedure
set
and made
revisions,
as required,
to properly implement code requirements.
The inspector
sampled
and examined six SMEI procedures
(covering
subjects
such
as pipe support installation
and inspection,
pipe
visual inspection,
drawing control,
and weld identification,
reinforcement
and undercutting)
to verify review and implementation
of code requirements
and
had
no further questions.
Closed)
(275/80-10/03
Possible
Debris Access in Panels
SPHA
and
SPGA
The licensee
evaluated
the need for the questioned ventilation
holes
and found them to be unnecessary.
The panels
have
been
modified with metal plates to provide protection from possible
debris
access.
Control power entry into the breaker enclosure
is via a separate
terminal
box mounted
on the enclosure.
This
item is closed.
c ~
Closed
275/80/04
Classification of Mattmeter
Housin
Panel s
A Design
Change
Request
(DC-1-G-E-1858)
has
been submitted to
reclassify these
panels
as
Class
IE.
The inspector
reviewed
the panel
mounting per the licensee's
drawing for standard
seismic category
1 mounts
(DiIG 050030).
No problems were noted.
The licensee will inspect the installation of these
panels
per
their standard
procedures
for Class
IE equipment.
This item is
closed.
5.
Licensee Action on 50.55
e
Items
a
~
0 en
Cracked
Pl asti c
Cam Followers in G. E.
T
e Switches
b.
The licensee
reported
by telecon
on January
21,
1980 that cracking
had
been
observed in the plastic
cam followers for General
Electric
Type
SBM switches installed in Unit l.
A preliminary written
report was submitted
on March 10,
1980.
The licensee will replace
switches of the
SBM type with switches of a different design prior
to operation.
The inspector
observed
work in progress
to replace
these
switches.
The inspector
noted possible
cracks
on the
cam
followers of type
SBM switches
removed from Unit
1
4160 volt
switchgear
but did not note any switches
which were inoperable.
This item will be examined during
a future inspection.
0 en
Insulation failure of Electrical
Cables
Routed to the
Unct
Inta e Structure
The licensee
reported
by telecon
on February
28,
1980,
a
deficiency involving insulation failure on
a number of electrical
cables
routed to the Unit
1 intake structure,
and submitted
a
preliminary written report on March 21,
1980.
The inspector discussed
two apparent construction deficiencies identified by the licensee:
(1) Concrete trench walls to support the 6" thick concrete
cap
had not been installed
and (2)
PVC conduit in the area
had not been
provided with the support configuration required
by drawings.
The inspector
reviewed
the
new design for this cable
support structure which encases
the
PVC conduit in a
"monolith" block of concrete
keyed to the crib wall and
intake structure pull box.
Photographs
taken at various
stages
of the excavation
and repair were reviewed together
with observation of completed work.
The inspector discussed
with the licensee similar problems
with the Unit 2 intake structure
cable routing.
The licensee
plans to make similar repairs to the Unit 2 intake structure.
This work will be detailed in the licensee's
final report on
this item.
This i tem will be examined during
a future inspection.
6.
Unit
1 Modifications Related to TMI
The licensee
was
engaged
in the Unit
1 installation of certain
modifications
as committed in the
PGSE response
to NUREG-0578 (Short
Term Lessons
Learned Requirements).
a
~
Emer
enc,
Power Supnl
for Pressurizer
Heater
Grou
s 1-2 and 1-3
The inspector
examined
the installation of seven electrical
circuits and
two conduits, including supports,
related to this
modification for compliance with procedures.
In addition, the
following documentation
related to the above observations
were
examined:
raceway inspection reports;
support inspection
worksheets
and reports; circuit pulling records,
and
termination documentation;
one torque wrench calibration recall/
calibration records,
and the recall/calibration for two
termination tools.
b.
Ho items of noncompliance or deviations
were identified.
Hydro en Recombiner
S stem
The inspector
examined nine electrical circuits, three of which
had cables pulled and six had cables
pulled and terminated,
and
three conduit installations for compliance with procedures.
In
addi tion, the following documentation
related
to the above
observations
were examined:
raceway inspection reports;
support inspection work sheets
and reports; circuit pulling
records,
and termination documentation;
and the recall/
calibration documentation
for one termination tool.
No items of noncompliance
or deviations
were identified.
-5-
c
Acoustic Flow Monitor on Pressurizer
Safet
Valves
The inspector
examined
the installation of three acoustic
flow sensor circuits on the Unit
1 pressurizer
safety valves
for compliance with procedures.
It was noted that safety
wire on the acoustic detectors
was broken.
The licensee
stated that these safety wires would be replaced.
All other
work appeared
to have
been accomplished
in accordance
with
established
procedures.
No items of noncompliance of deviations
were identified.
7.
Safet
Related
Concrete
Placement
The inspector
observed
work and work activities associated
with a
concrete
placement for the technical
support center.
The inspector
observed
batch plant operations,
acceptance
testing,
and placement
activities for compliance with procedures
and industry standards.
The placement
was halted after approximately five yards
due to a
bearing failure on the liftcrane.
No items of noncompliance or deviation were noted.
8.
Modifications to Auxiliar
Control
S stem
The inspector
examined modifications being performed to the auxiliary
system for compliance with procedures.
The installation of
8 conduits/raceways
and their supports
were inspected
along with
applicable support inspection work sheets
and inspection reports.
Cable pulling activities
had not started
on the modification at the
time of the inspection.
No items of noncompliance or deviation were noted.
9.
Licensee's
Res
onse to IE Bulletin 80-16
and
The inspector
reviewed the licensee's
actions to date in response
to IEB 80-16 and
IEC 80-16 of June
26,
1980.
This bulletin and
circular detailed
problems with Rosemount
Model
1151
and
1152
pressure
transmitters
and Model
510
DU trip units.
The licensee
stated that the response
was not complete at the time
of inspection.
It had been established,
however, that
510
DU trip
units were not utilized at Diablo Canyon
and
Rosemount
pressure
transmitters utilized as
steam flow detectors
may in some conditions
exceed
the 1404 upper range limit condition described
in the bulletin.
These
pressure
transmitters will be addressed
in the licensee's
response.
0
k
/
s
upas
llsJP:0
10.
Nonconformance
Re ort Review
The inspector
examined
the civil, mechanical, electrical
and clean-up
crew minor variation reports
issued
since Hay, 1980,
and the
nonconformance
reports
issued
since February,
1980.
The reports
appeared
to have
been evaluated
and resolved
as required
by the
gA
program.
ll.
gA Audits
The licensees
internal audit system
was inspected
by examining
18 gA
Audits of General
Construction activities performed since
June 1, 1980.
In those
cases
where findings required corrective action to be t'aken
the corrective actions
had
been
completed in accordance
with the
licensee's
nonconformance
reporting system or open item resolution
system.
No items of noncompliance or deviations
from the licensee's
gA audit
and reporting system were identified.
12.
Exit Interview
The inspectors
met with licensee
representatives
(denoted in Paragraph
1)
at the conclusion of the inspection
on August 15,
1980 and summarized
the inspection
purpose,
scope
and findings.
I +
4>>
I