ML17157A494
| ML17157A494 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 12/28/1990 |
| From: | Blough A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML17157A493 | List: |
| References | |
| 50-387-90-20, 50-388-90-20, NUDOCS 9101090160 | |
| Download: ML17157A494 (4) | |
See also: IR 05000387/1990020
Text
<<1
12
8.1.3.3
Closed
UNR 50-387/85-09-01
Corrective Actions to Enhance
the
Vent Stack Monitorin
S stem
.
In May 1983,
the licensee identified a number of deficiencies with
the vent stack monitoring system
(SPING) operator interface
and
system design.
Thus, the licensee
developed
a SPING enhancement
project intended to improve the design of the vent stack monitoring
system
and its operator interaction.
The
SPING enhancement
project
was divided into five phases,
each consisting of various Design
Change
Packages
(DCP's) to install modifications to resolve the
identified deficiencies.
These
improvement modifications
can
be
accomplished
without affecting the system's
operation
and without an
outage.
Scope
and funding"i,s complete for phases
1, 2,
and 4.
Some
of the DCP's/modifications within phase
1 and
4 have
been installed
and implemented (i.e.,
low point drain installation
on the Post
Accident Vent Stack Sampling Station
sample tubing and installation
of shut-off quick disconnects
on the sentry cart isolation valve
sample tubing).
Phase
1 includes the installation of a
new improved
control terminal insert to be supplied
by Eberline
and the redesign
-of the Susquehanna
Terrain-Incorporating
Regional Effluent
Assessment
Model
(STREAM) interface
and is scheduled for
installation in December
1990.
The inspector determined that the licensee
has developed
a thorough
an extensive
program to improve the performance
of the vent stack
monitoring system.
Some of the planned
improvements
have already
been
implemented,
and the remaining
system
upgrades
are identified
and accurately
tracked
on the licensee's
Plant Problem List.
Therefore, this issue is considered
closed.
Even though this issue is closed,
the inspector considers
the
licensee's
actions untimely:
This item has
been
in process
for'
greater
than
seven years with little or no modification to the
power plant.
The inspector
has
noted that licensee
actions in
resolving technical
problems that require plant modification are
generally protracted.
The need to implement timely reviews in
resolving technical
concerns
has
been
emphasized
to the licensee
on
numerous
occasions.
Greater
management
involvement is necessary
in resolving technical
issues
in a timely fashion, especially
where
modifications are concerned.
8.1.3'.
Closed
Other 50-387/86-24-02
Airborne Contamination
In Radwaste
~BU<< 1 din
In November
1986,
several
Radwaste
Building floor elevations
became
contaminated
as
a result of hydrolazing radwaste filters in the
Radwaste
Carwash
area.
The ventilation system's
flow distribution
transported
some of the contamination
to these other elevations.
9'iOi090i 60
ADOCK
Immediate corrective actions
taken to resolve
the airflow
di stribution
and contamination
problem consisted of limiting access
pathways to the carwash
area
in the radwaste building.
In
addition, the licensee
installed temporary hatch covers
over the
access
shafts
in the carwash
area.
90i228
05000387
(-
13
The licensee
established
corrective actions to ensure that this
problem does not recur.
The air distribution in the radwaste
building will be contolled
by installing portable
hatch covers over
the north and south access
shafts in the radwaste
carwash
area
per
Engineering
Work Request
EWR-M-70187.
When the covers are installed
in January
1991,
the estimated ventilation supply will be
approximately
400 scfm and the exhaust air wi 11
be approximately
800
scfm.
This distribution of normal ventilation will maintain the
carwash
area slightly negative,
relative to the rest of the radwaste
building.
Based
on this approach,
the inspector
has reasonable
assurance
that
the covers will eliminate the transport of contamination
throughout
the radwaste building.
Therefore, this item is closed.
9.
MANAGEMENT AND EXIT MEETINGS
9. 1
Routine Resident Exit and Periodic Meetin
s
The inspect'or. discussed
the findings of this inspection with station
management
throughout
and at the conclusion of the inspection period.
Based
on
NRC Region I review of this report and discussions
held with
licensee
representatives, it was determined that this report does not
contain information subject to
10
CFR 2 '90 restrictions.
9.2
Attendance at Mana ement Meetin
s Conducted
B
Re ion Based
Ins ectors
Dates
s
9/14
Subject
Emergency
Planning
~ins ection
~Rs ort No.
90-18;90-18
~Re ortin
~Ins ector
E.
Fox
tl
l,