ML20153A842

Insp Repts 50-327/88-30 & 50-328/88-30 on 880523-24.No Violations or Deviations Noted.Major Areas Inspected:Plant Chemistry

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: IR 05000327/1988030 ML20153A842
References
50-327-88-30, 50-328-88-30, NUDOCS 8807120593
Download: ML20153A842 (4)

See also: IR 05000327/1988030

Text

, . . _.

. . . . . . ~ ..._.m ..

UNITED STATE 3

' gs3 8t80ugD

' *, o NUCLEAR REGULATORY COMMISslON

~'

y n REGION li

j Ij 101 MARIETTA STREET,N.W.

• C ATLANTA. GEO:4GI A 30323

\; . . . . . /

JUN 2 3 NI8  ;

,

Report Nos.: 50-327/88-30 and 50-328/88-30

4

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 -

4

Facility Name: Sequoyah 1 and 2

. Inspection Conducted: May 23-24, 1988

Inspector: / L '

1. //ja ,_ _ d 6/cfcf

C. A. Frug le9 '/ D/te- M gned

'l

Accompanying Pe nnel: J. B. Kahle

Approved by:

J

[a[b

B. K3hle, Section Chief

,

d!/6

D(te Signed

!M

0 vi ion of Radiation Safety and Safeguards

i

L

SUMMARY

,

'

l Scope: This special, announced inspection was in the area of plant chemistry.

Results: In the areas inspected, violations or deviations were not identified.

4

.

Y

k

4

'

,

i

,

,

j '

] i

1

I

I

,

,

1

1

!

,

!  !

j

!

8807120593 880623

PDR i

'

O ADOCK 05000327 i

PDC '

- . - - - _ , _ _ . - . - _ , -

. . .- . . .

>

.

,

..

.

i REPORT DETAILS l

i

1. Persons Contacted

Licensee Employees ,

f

• R. Burch, Radiation Chemistry Section Supervisor  ;

G. Fiser, Chemistry Manager

D. Goetcheus, Chemistry Supervisor {

• L. Jackson, Assistant _to the Plant Manager

D. Nix, Chemical Engineer

V. Shanks, Manager, Water and Waste Processing Group ,

'

• S. Smith, Plant Manager

j

,

• S. Spencer, Compliance Coordinator

i

Other licensee employees contacted during this inspection -included .

,

engineers, security force members, technicians, and administrative '

personnel.

l NRC Resident inspector

• F. McCoy

• Attended exit interview

,

2. Background Information

-

'

The abbreviated inspection was conducted to review Unit 2 restart

chemistry control data since May 1988, and prior to the plant exceeding'75

l percent power.  !

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

2

was based on guidelines recommended by the Steam Generator Owners' Group ,

(SG0G) and the Electric Power Research Institute (EPRI).

,

'

l

3. Review of Unit 2 Chemistry Controls i

1

'

a. Reactor Coolant System (RCS) j

Data reviewed by the inspector indicated that radiological and

non-radiological chemistry parameters in the RCS had been maintained ,

within Technical Specifications and Plant Administrative limits' for  !

the period May 11-23, 1988. '

The chemical and volume control system mixed bed deminerali

ers had

4

been effect.ive in keeping the RCS chloride and fluoride

4 concentrations below 10 parts per billion (ppb). Dose equivalent

1

l

l

- l

.

.-

..

.

.

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 over the period, indicating very 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

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.

1

e. Steam Generators l

l

Steam generator blowdown sulfate, sodium, cation conductivity and

chloride concentrations generally were maintained within SGGG/EPRI l

guidelines. Excursions that did occur during plant transients were l

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.

--_-____-_________________________________________-___-____-_________--______--______----_-____---_--____--_-__-_______-._-_Y

. . . .

. - ..

,_ . . .

,

,

,,-

,

3

,

The inspector toured-the chemistry laboratories and held brief discussions

with several' laboratory personnel. Facilities.; equipment and personnel

. appeared to.be adequate.

, 5. Sumary

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

,

occasional excursions'during plant transients. - The continued maintenance

and improvement of plant chemistry a'nong-with department staffing _and

'

training will be addressed during subsequent inspections.

I 6. Exit Interview

The inspection scope and results were sumarized on May 24, 1988, with ,

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.

i

j

i

i

I

I

4

-

!

'

l

,

l

i

9

1

1