ML16340B872
| ML16340B872 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 06/09/1981 |
| From: | Bagaglio M, Mendonca M, Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML16340B873 | List: |
| References | |
| 50-275-81-12, 50-323-81-09, 50-323-81-9, NUDOCS 8107010441 | |
| Download: ML16340B872 (8) | |
See also: IR 05000275/1981012
Text
Report
No.
50-275/81-12
50-323/81-09
U. S.
NUCLEAR REGULATORY COMMISSION
OFFICE
OF INSPECTION AND ENFORCEMENT
REGION V
License
No
50-275,
50-323
Priority
CPPR39
>
CPPR69
Category
Licensee:
Pacific
Gas
and Electric Company
P.
O. Box 7442
San Francisco,
California 94106
Diablo Canyon Units
1
6c 2
Facility Name:
Inspection at:
Inspection conducted:
Diablo Canyon Site,
San Luis Obispo County, California
Hay 1 - June 5,
1981
Inspectors:
Mari
dag
o Jr
,
ior
sident Reactor Inspector
Date Signed
Harvin Mendonca,
Resident
Reactor
Insp'ector
Date Signed
Date Si ned
Approved by:
D. M. Sternberg,
Chic
, Reagor Projects
Section
1
Division of Resident
React r Projects
ate Signed
Summary:
Ins ection oi Ma
1 to June
5
1981
Re ort Nos. 50-275/81-12
& 50-323/81-09
Areas Ins ected:
Routine inspection of plant tours,
procedure
reviews, bulletin/
circular followups, follovup of outstanding
items,
and an allegation on heat
tracing installation.
This inspection involved
56 inspector hours onsite by
tvo
NRC resident
inspectors.
Resnlts:
No items
od noneomplianee
or deviations
ware identified.
IE:V Form 219
(1)
rgglvo rsPP(
4
'%
+
4
1
DETAILS
1.
Persons
Contacted
R. Thornberry, Plant Manager
R. Patterson,
Plant Superintendent
- J. S.
Diamonon,
gC Supervisor
J.
M. Gisclon,
Power Plant Engineer
- D. A. Backens,
Supervisor of Maintenance
- J. A. Sexton,
Supervisor of Operations
- J. V. Boots, Supervisor of Chemistry
and Radiation Protection
- R. T. Twiddy, Supervisor of guality Assurance
- W. B. Kaefer, Technical Assistant to the Plant Manager
The inspectors
also talked with and interviewed
a number of other licensee
employees
including members of general
construction,
the operations staff
and
gA personnel.
- Denotes those attending the exit interview.
2.
Plant Tour
The inspectors
walked through various
areas of the plant on
a weekly basis
to observe activities in progress;
to inspect the general
state of clean-
liness,
housekeeping'nd
adherence
to fire protection rules; to check the
proper approval of "man on the line, caution
and clearance"
tags
on equip-
ment,
and to review with operation
personnel
the status of various
systems
in the plant.
The inspectors
noted that the status of the systems
and the housekeeping
appeared
consistent with construction activities.
The reactor cavity is
still being maintained
as
a clean area.
No items of noncompliance or deviations
were identified.
3.
Procedure
Review
An inspector
reviewed the following new or revised procedures:
OP 0-1
OP 0-1:I
OP 0-1:II
OP D-1:III
OP D-1:IV
system
Make Available and Place in Service
Normal Operation
Shutdown
and Clearing
Abnormal Operation
Based
upon this review and review of preoperational
test results
the
inspector
ascertained
that the recirculation valves for the motor-driven
Pumps
(AFP) would be improperly positioned during
performance of OP D-l:I.
Specifically,
OP D-1: I directs
opening the
recirculation valves
whereas
preoperational
testing
has
demonstrated
'w
ww ~
w
~
-2-
that these
valves
should
be throttled to eliminate the
15 gallons per
minute extra recirculation flow.
The applicant
has
committed to revise
OP D-1: I and
OP K-10D (Sealed
Valve Checklist for the
AFW System).
Accordingly, this commitment is
an open item and will be
a prerequisite
for ascension
to full power (80-12-01).
No items of noncompliance
or deviations
were identified.
Alle ation Related to Heat Trace Installation
On May 22,
1981,
inspectors
met with an individual in the
RV office who
expressed
concern
as to the adequacy of Thermon heat tracing at Diablo
Canyon.
The individual stated,
without supplying the information source,
that
he was told by an engineer,
employed in a consulting capacity
by
PGE E, that
PGE E had encountered
problems with Thermon heat trace
and
has
continued to utilize Thermon material.
The allegation
was not substantiated.
The inspectors
investigated
the allegation through discussions
with site
and corporate office engineering
personnel
and examination of representative
records of problems
encountered
and resolutions
made for those problems.
The inspectors
found that no evidence exists to indicate that
Thermon heat
tracing is defective.
It was observed that heat trace
problems
encountered
were generally
due
to an apparent
excessive
amount of trace
used in some applications
which
caused
degradation
of the wire insulation
due to excessive
heat.
These
problems
were corrected
by utilizing Thermon design
engineers
on site
to individually custom design heat trace
systems for Diablo Canyon.
Since
design completion
and installation, the licensee
has
had
no significant
repetition of previously encountered
application problems.
No items of noncompliance
or deviations
were identified.
Followu
of Outstandin
- Items
Use of Permanent
Plant Instrumentation
in Preoperational
Testing
(80-03-02,
Closed,
Unit
1 only)
Permanent
plant instrumentation
was
used to record preoperational
test
data without consideration
given to the accuracy of the permanently
installed indicators
when evaluating the results of testing.
The
applicant
has reviewed
a total of 372 preoperational
test procedures
to determine if permanently installed instrumentation
was used to record
data
and then evaluate
the impact on results after taking into account
instrument inaccuracies.
Of these
372 procedures
74 required resolution
of the acceptance
criteria.
In all but
3 of the 74 procedures
the
applicant justified his resolution
by revising the acceptance
criteria
or citing surveillance testing satisfactorily performed
by the Nuclear
Power Operations
(NPO) Division subsequent
to preoperational
testing.
The applicant
has determined that
3 preoperational
test. addenda
need
to be written and performed
as
a result of his review.
An inspector
has reviewed the applicant's report
and portions of several
preoperational
tests evaluating his resolutions
and justifications
and
has
determined
the applicant's
response
to this open item as satisfactory for unit
1
only.
The applicant
will submit
a similar report
on evaluation of Unit 2
preoperational
testing in the future.
Accordingly this open item is
cl os ed for Unit
1 but
1 eft open for Unit 2.
No items of noncompliance
or deviations
were
identified.'E
Bulletin/Circular Fol1owu
Inspectors
reviewed licensee
actions related to IE Bulletins
and Circulars.
Inspection findings relating to the Bulletins
and Circulars-reviewed
were
---
as follows:
Loss of Non-Class
IE Instrumentation
and Control
Power
System
Bus During Operation
(Closed):
The applicant
has
responded
to
the subject bulletin in letters of April 15,
1980,
and
May 1,
1981.
The
inspectors
have verified the applicant's
response
including reviews of
new operating
procedures
and verification of plant modifications.
Based
upon the inspectors'valuation
of the applicant's
response,
the licensee
has
met the requirements
of IEB 79-27
and this bulletin is considered
closed.
IE Bulletin 81-02, Failure of Gate Type Valves .to Close Against Differen-
tial Pressure
(Closed):
The licensee
has
performed
a review of all
valves supplied for the
NSSS at Diablo Canyon.
Diablo Canyon
has
no
valves affected
by the subject Bulletin and it is accordingly considered
closed.
No items of noncompliance or diviations were identified.
Exit Interview
The inspectors
met with a senior licensee
representative
on
a weekly
basis
and with the representatives
denoted
in Paragraph
1
on June 4,
1981.
The scope
and findings of the inspection
were summarized
by the inspectors.
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