ML20153A842
| ML20153A842 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/16/1988 |
| From: | Kahle J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20153A845 | List: |
| References | |
| 50-327-88-30, 50-328-88-30, NUDOCS 8807120593 | |
| Download: ML20153A842 (4) | |
See also: IR 05000327/1988030
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UNITED STATE 3
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NUCLEAR REGULATORY COMMISslON
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101 MARIETTA STREET,N.W.
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ATLANTA. GEO:4GI A 30323
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JUN 2 3 NI8
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Report Nos.: 50-327/88-30 and 50-328/88-30
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Licensee: Tennessee Valley Authority
6N38 A Lookout Place
1101 Market Street-
Chattanooga, TN 37402-2801-
Docket Nos.: 50-327 and 50-328
License Not.: DPR-77 and DPR-79
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Facility Name: Sequoyah 1 and 2
Inspection Conducted: May 23-24, 1988
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Inspector:
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C. A. Frug le9
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Accompanying Pe
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J. B. Kahle
Approved by:
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B. K3hle, Section Chief
D(te Signed
0 vi ion of Radiation Safety and Safeguards
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SUMMARY
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Scope: This special, announced inspection was in the area of plant chemistry.
Results:
In the areas inspected, violations or deviations were not identified.
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8807120593 880623
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ADOCK 05000327
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REPORT DETAILS
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1.
Persons Contacted
Licensee Employees
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- R. Burch, Radiation Chemistry Section Supervisor
G. Fiser, Chemistry Manager
D. Goetcheus, Chemistry Supervisor
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- L. Jackson, Assistant _to the Plant Manager
D. Nix, Chemical Engineer
V. Shanks, Manager, Water and Waste Processing Group
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- S. Smith, Plant Manager
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- S. Spencer, Compliance Coordinator
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Other licensee employees contacted during this inspection -included
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engineers, security force members, technicians, and administrative
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personnel.
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NRC Resident inspector
- F.
McCoy
- Attended exit interview
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2.
Background Information
The abbreviated inspection was conducted to review Unit 2 restart
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chemistry control data since May 1988, and prior to the plant exceeding'75
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percent power.
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Unit 2 was shutdown in August 1985, and had been in lay-up conditions from
then up to the restart.
Details of the lay-up program were described in Inspection Report Nos.
50-327/88-08 and 50-328/88-08 dated March 22, 1988.
The lay-up program
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was based on guidelines recommended by the Steam Generator Owners' Group
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(SG0G) and the Electric Power Research Institute (EPRI).
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3.
Review of Unit 2 Chemistry Controls
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Data reviewed by the inspector indicated that radiological and
non-radiological chemistry parameters in the RCS had been maintained
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within Technical Specifications and Plant Administrative limits' for
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the period May 11-23, 1988.
The chemical and volume control system mixed bed deminerali:ers had
been effect.ive in keeping the RCS chloride and fluoride
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concentrations below 10 parts per billion (ppb).
Dose equivalent
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lodine-131 activity and lodine-131/133 ratio indicated minor fuel
leakage,
b.
Hotwell
Dissolved oxygen and sodium averaged less than five ppb during power
operations
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period,
indicating
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little
below-the-waterline air and circulating water leakage into the
condenser.
Grab samples indicated cation conductivity slightly
greater than the 0.15 umho/cm administrative limit.
c.
Condensate Polishers
Effluent samples from the condensate polishers during the period
indicated that sodium, sulfate and silica concentrations averaged
less than five ppb, one ppb and ten ppb, respectively.
Effluent
cation conductivity from each of six vessels was maintained at about
0.6 umho/cm.
These numbers indicated that the polishers had been
effective in maintaining feedwater and steam generator chemistry.
The licensee indicated that all resins in the polisher vessels had
been replaced prior to the restart.
The inspector considered that
this replacement was a major contributor to good water quality during
the restart,
d.
Feedwater cation conductivity indicated a definite decreasing trend
during the period.
At the beginning of the period cation
conductivity averaged about 0.3 umho/cm and had decreased to about
0.1 umho/cm by May 22, 1988, sodium had decreased to less than 1 ppb
and pH was maintained consistently between 8.8 and 9.2.
e.
Steam generator blowdown sulfate, sodium, cation conductivity and
chloride concentrations generally were maintained within SGGG/EPRI
guidelines.
Excursions that did occur during plant transients were
quickly reduced back to normal levels.
Oscillations of pH outside administrative limits did occur during the
period, and were attributed to feedwater flow changes during
start-ups, power changes and transients.
During steady-state
operations, pH was within administrative limits.
4.
Staffing / Facilities
The inspector noted recent managerial staffing changes in the areas of
plant chemistry and water treatment.
These represented a gain in
operational experience from other nuclear units that should be an asset to
the Sequoyah chemistry program.
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The inspector toured-the chemistry laboratories and held brief discussions
with several' laboratory personnel.
Facilities.; equipment and personnel
appeared to.be adequate.
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5.
Sumary
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The inspector. concluded that the licensee had effectively maintained
primary chemistry within . Technical Specifications and secondary chemistry
generally within the limits recomended by the SG0G and EPRI, except for
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occasional excursions'during plant transients. - The continued maintenance
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and improvement of plant chemistry a'nong-with department staffing _and
training will be addressed during subsequent inspections.
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6.
Exit Interview
The inspection scope and results were sumarized on May 24, 1988, with
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those persons indicated in paragraph 1.
The inspectors described the
areas inspected and discussed the inspection results.
Proprietary
information is not contained in this report. . Dissenting coments were
not received from the licensee.
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