ML19225A099
| ML19225A099 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 05/14/1979 |
| From: | Boyd D, Kohler J, Spessard R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19225A087 | List: |
| References | |
| 50-295-79-08, 50-295-79-8, 50-304-79-09, 50-304-79-9, NUDOCS 7907180323 | |
| Download: ML19225A099 (4) | |
See also: IR 05000295/1979008
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U.S. NUCLEAR REGULATORY COMMISSION
OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No. 50-295/79-08; 50-304/79-09
Docket No. 50-295; 50-304
Licensee:
Commonwealth Edison Company
Post Office Box 767
Chicago, IL 60690
Facility Name:
Zion Nuclear Fower Station, Units 1 and 2
Inspection At:
Zion Site, Zion IL
Inspection Conducted: April 6, 10, 11 and 23-27, 1979
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Inspectors:
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Approved By:
R. L. Spbssard, Chief
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Reactor Projects Section 1
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Inspection Summary
Inspection on April 6,10,11 and 23-27, 1979 (Report No.
50-295/79-08; 50-304/79-09)
Areas Inspected:
Three Mile Island event training, Unit I reactor
startup, plant operations, compliance with IE Bulletin to trip
pressurizer level channels, and licensee event reports.
The inspec-
tion consisted of 71 inspector-hours onsite by two NRC inspectors.
Results: One item of noncompliance (infraction - violation of a
limiting condition for operation
paragraph 7) was identified.
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DETAILS
1.
Persons Contacted
N. Wandke, Plant Superintendent
C. Schumann, Operating Assistant Superintendent
E. Fuerst, Operating Engineer, Unit 1
B. Ward, Operating Engineer, Unit 2
C. Schultz, Training Supervisor
J. Harbin, Shift Engineer
J. Flowers, Shift Engineer
N. Valos, Shift Foreman
L. Soth, Assistant Superintendent, Administrative and Support
J. Johnson, Lead Operator
2.
Three Mile Island Training
The inspector audited a training courre offered to station
personnel regarding the events which took place at Three Mile
Island. The TMI training courses reflect the requirement in IE
Bulletin 79-06 that licensee management brief its personnel as
completely as possible on the TMI incident.
The inspector has
no further questions regarding this item.
3.
Unit 1 Reactor Startup
On April 27, 1979, the inspector reviewed the Unit I startup
associated with the Unit I reactor trip caused by steam gener-
ator low low level on April 26, 1979. The startup was orderly
and procedures were followed.
At about a power level of 150 MWe into the startup while trans-
itioning f om the feedwater bypass valve to the main feed
regulating ;alve, the reactor tripped on low low steam generator
level.
The cause of the trip was traced to a failed solenoid
in the feedwatt reg valve.
The soletoid failure inhibited the
regulat ing valve fi am opening and starved the steam generator.
The soleno)d in both Unit 1 feedwater reg valves was changed
out, and a reactor startup took place shortly thereafter.
D'u.ng the review of the Unit I reactor trip on April 26, 1979,
one electric auxiliary feed pump failed to start.
Tbn two
redundant pumps func'ioned properly.
Caure of the pump start
failure was traced to the pressure switch in the lube oil pump
which had drifted high.
These pressure switches were being
calibrated under a Work Request issued on April 26, 1979.
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The inspector has no further questions regarding the Unit 1
startup after the reactor trip of April 26, 1979.
4.
Plant Tour,
The inspector toured the turbine building, the auxiliary
building, and the control room with a D-operator who was making
normal rounds.
The tour was routine and no concerns resulted.
5.
Pressurizer Level Trips
Based on requirements in IE Bulletin 79-06A, the inspector
verified that the low pressurizer level trip bistables which
act in coincidence with low pressurizer pressure to cause a
safety injection were placed in the trip condition for both
Units 1 and 2.
6.
Review of Plant Operations
The inspector spent time in the control room and reviewed the
tagging out log, the shift logs, and the surveillance required
to be parf- ied due to limiting conditions for operation (LCO).
The inspector found that the required surveillance was being
performed for LCO's and has no further questions in this area.
7.
Review of Licensee Event Report (50-295/79-16)
The licensee notified RIII on March 12, 1979, that Technical Specification 3.15.2.c for Unit 1 was violated when the cross
tie breaker from Unit 2 system auxiliary transformer to Unit 1
essential service feature bus was taken out of service coinci-
dentally with the IB diesel generator out of service.
The
inspector reviewed the event associated with taking the cross
tie breaker out of service. The cause of event was classified
as personnnl error.
Corrective action cor.sisted of shift
reinstruction as well as the procedure change in periodic test
14.
This item is considered an item of noncompliance against Tech-
nical Specification 3.15.2.c and is classified as an infraction.
During the management exit, the inspector stated that the cross
tie breaker noncompliance was the second this year in the
auxiliary electrical area.
The first noncompliance was docu-
mented in RIII Inspection Report 50-295/79-01.
There was.
agreement that additional licensee action must be taken to
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insure that Technical Specification 3.15 is not violated.
Consequently, the licensee will be requested to submit, as an
additional response to this item, plans to augment surveillance
in the auxiliary electrical area with particular attention to
insuring that all essential service features buses are aligned
to their proper power sources.
8.
Management Exit
A management exit was held on April 27, 1979 in which the
following items were discussed:
a.
Unit 1 reactor trip due to the feedwater transient.
b.
Unit 1, Unit 2 compliance with tripping pressurizer level
channels and safety injection logic.
Licensee deficiency in the auxiliary electrical area, and
c.
the noncompliance associated with Technical Specification 3.15.
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