ML16340A302
| ML16340A302 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 11/15/1978 |
| From: | Canter H, Faulkenberry B, Miller L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML16340A303 | List: |
| References | |
| 50-275-78-16, NUDOCS 7812130314 | |
| Download: ML16340A302 (6) | |
See also: IR 05000275/1978016
Text
~~
U. S.
NUCLEAR REGULATORY COMMISSION
OFFICE
OF INSPECTION AND FNFORCEi~EilT
Report 'No
50-275/78" 16
33ocket
No.
REGXON V
License
No
CPPR-39
Safeguards
Group
Pacific
Gas
and Electric Company
77 Beale Street
San Francisco,
94106
Fac gi tv
Name
Dia bl o Canyon
Unit
1
Ins ection at
Diabl o Canyon Si te,
San Luis Obi sPo,
Cal iforni a
Inspection
conducted:
October 30-31,
and
November 1,
1978
~
~
er,
or
n pec
l</i~ l~Q
Date Signed
er,
e t
n
nspector
Date Signed
G.
W. Joh
ton,/'Re ct
Approved
By:
B.
H. Faulken
rry,
C
Inspector (Intern
Pu'ef, Reacto
Project
Da'
Signed
lP yp 7g
Section
2
Da
e Si 'ned
w
Summary:
Ins ection on October 30-31,
and
November 1,
1978
Re ort No.
50-275/78-16
~AI
d:
lt
i
.
d i
p
i
f
h
C
Integrated
Leak Rate Test
(CILRT) including procedure
reviews
and test
witnessing.
This inspection involved 78 inspector
hours onsite
by three
NRC inspectors.
Results:
No items of noncompliance
or deviations
were disclosed.
vezsxs03I'/
RV Form 7l9 (2)
DETAILS
1.
Persons
Contacted
- R. Ramsay,
Plant Superintendent
- J. Gisclon, Senior
Power Production
Engineer
- R. Patterson,
Supervisor of Operations
- J. Diamonon,
gC Supervisor
- J. Sexton,
Power Production
Engineer
- C. Seward,
gA Engineer
+J. Shiffer, Power Plant Engineer
The inspectors
also talked with several
other licensee
employees
including members of the technical
and engineering staff, techni-
cians,
and maintenance
personnel.
- Denotes those present at exit interview.
2.
Procedure
Review
The inspectors
reviewed licensee
procedures
for Local
Leak Rate
Testing
(Type
B and
C tests),
and the Containment
Integrated
Leak
Rate Test (CILRT).
This review was to ascertain. whether the pro-
cedures
were consistent with regulatory requirements
and guidance,
as stated
in the following documents:
Appendix J to 10 CFR 50, "Primary Reactor
Containment
Leakage
Testing for Water-Cooled
Power Reactors."
American National
Standard
N45.4-1972,
"Leakage Rate Testing
of Containment Structures for Nuclear Reactors."
Regulatory Guide 1.68, "Preoperational
and Initial Startup
Test Programs for Water-Cooled
Power Reactors."
Topical Report BN-TOP-l, Revision 1, "Testing Criteria, for
Integrated
Leakage
Rate Testing of Primary Containment Struc-
tures for Nuclear
Power Plants,"
Bechtel Corporation.
No items of noncompliance
or deviations
were identified.
3.
Containment Inte rated
Leak Rate Test
(CILRT)
The inspectors
witnessed
selected
portions of the CILRT.
The test
was conducted at a reduced
pressure
(Pt=25.0 psig and Lt=0.0472 Wt.
5/24 hours).
Fifteen penetrations
wer'e selected at random by an
.
inspector
and were observed
to be lined up in accordance
with the
-2-
procedure.
Other areas
observed
included minimum crew require-
ments; test prerequisites
being met; special test equipment in
service
and calibrated;
and proper plant systems
in service.
The licensee
commenced
pressurizing
-the containment
on October 30,
1978.
Ouring the
10 psig inspections,
an engineer
noticed
a
leaking ventilation valve.
The cognizant test 'engineer
decided to
depressurize
the containment,
repair the valve,
and repressurize
that evening.
At, 5:00 a.m.
on the .following day, October 31, the
licensee
commenced
taking data after containment
temperature
had
stabilized.
The test
was concluded
November
1 at 7:30 a.m.,
followed by a superimposed
leak rate verification test.
The licensee's
preliminary result for the Type A test,
which did
not include Type
B or
C additions,
was
a total time leak rate which
was less
than the allowed acceptance
criter ia.
All test parameters
met applicable criteria for acceptance.
The IE inspectors'nde-
'endent
calculations, for the test period used
by the licensee,
indicated
a mass point leak rate of about 0.026Ã/24 hours.
The
acceptance
criterion at the
95K upper confidence level
was about
.0355/24 hours.
No items of noncompliance or deviations
were identified.
4.
Exit Interview
The inspectors
met with licensee
representatives
(denoted in
Paragraph
1) on November 1,
1978 at the conclusion of the inspec-
tion.
The findings of the inspection
were summarized
by the
inspectors.
The licensee
was advised that no items of noncompliance
or deviations
were identified.
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