ML19350B119
| ML19350B119 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 02/27/1981 |
| From: | Linder F DAIRYLAND POWER COOPERATIVE |
| To: | Fisher W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML19350B117 | List: |
| References | |
| LAC-7390, NUDOCS 8103190680 | |
| Download: ML19350B119 (4) | |
Text
.
D DAIRYLAND
[k COOPERAT/VE no sox si7 2eis EAST AV COUTH = L A CROSSE Wl5C0%N 5.:c
<60s, 7euca February 27, 1981 In reply, please refer to LAC-7390 DOCKET NO. 50-409 Mr. W.
L.
Fisher Acting Chief, Fuel Facility and Materials Safety Branch U.
S.
Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137
SUBJECT:
DAIRYLAND POWER COOPERATIVE LA CROSSE BOILING WATER REACTOR (LACBWR)
PROVISIONAL OPERATING LICENSE NO. DPR-45 IE INSPECTION REPORT NO. 50-409/80-15
Reference:
(1)
NRC Letter, Fisher to Linder, dated January 21, 1981.
Dear Mr. Fisher:
This letter constitutes the written statement required in reply to the January 1981 Inspection Report enclosed with Reference 1 which we received January 26, 1981.
Appendix A,
identified two violations.
ITEM 1 Technical Specification 2.11.2.5 requires that radioactive gaseous releases be made through the plant etack and be monitored.
Contrary to the above, an unmonitored release path existed through the oil storage room ventilation exhaust.
An unmonitored release actually occurred by this path on June 29, 1980.
Release calculatione indicate that neither the quantity nor concentratione exceeded regulatory limite.
DPC RESPONSE:
The potential for an unmonitored, unplanned release of gaseous activity from the mechanical vacuum pump has been reduced by the installation of a manuel shut-off valve in the vacuum pump loop seal drain line.- An operating procedure has been-implemented to require that the. valve be closed upon start-up of the vacuum pump for the 319Ofgyg K
2 % -- - - -
Hr. W.
L.
Fisher LAC-7390 Acting Chief, Fuel Facility and February 27, 1981 Materials Safety Branch purpose of drawing a vacuum on the main condenser.
Closure of this valve isolates the loop seal drain line from the Turbine Building grade floor drain system.
Tests have been conducted to measure the internal air pressure of the oil storage room relative to the Turbine Building and the outside.
The tests indicate that the oil storage room air pressure is slightly negative when compared to the outside with the oil vapor exhaust fan on or off and with the entrance door from the Turbine Building open or closed.
When the exhaust fan is off, the gravity-type outlet louvers close, irregardless of the position of the oil storage room door.
Therefore, the potential for an unmonitored release of radioactive material is further reduced.
Although the oil storage room air pressure is slightly negative when compared to the Turbine Building, while the door is closed, the differential pressure is zero when the docr is opened, while the ex-haust fan is operating.
During these observations, Turbine Building ventilation was in effect by use of the stack blowers - a normal condition.
To provide additional assurance against an unmonitored gaseous re-lease of radioactive material, current operating procedures have been amended to require shutting off the oil vapor exhaust fan in the event a radiation alarm is received from a Turbine Building area radiation detector which is on the west wall of the Turbine Building on the grade floor which is located in an area representative of air flow reasonably near the oil storage room.
The fan would remain off until conditions causing the alarm were determined or resolved.
The isolation valve was installed on August 15, 1980.
No further evidence of an unmonitored release of radioactive material from the oil storage room has been observed.
ITEM 2 10 CFR 20. 201(b) requires that surveye be made as necessary to comply with 10 CFR 20.
Contrary to the above, surveye vere not made outside of the radcaste building to determine compliance uith 10 CFR 20.203(b).
Surveys made by the inspectors, and confirmed by the licensee, found radiation tevete between five and ten mR/hr at 18 inches from the door of the radvaate building.
The area vae not posted as a radiation area.
DPC RESPONSE:
The radwaste drums which contributed to the reported radiation levels outside the radwaste building were promptly moved away from the.
Mr. W.
L. Fisher LAC-7390 Acting Chief, Fuel Facility and February 27, 1981 Materials Safety Branch double doors on the north side of the building upon discovery of the outside readings.
The affected areas were surveyed.
This corrective action was taken on December 10, 1980.
Health Physics personnel responsible for waste handling in this area have once again been reminded of their responsibilit, to conduct thorough surveys, including the necessity to consider adjo2ning out-side areas.
Attention to posting requirements has been emphasized.
In addition, the significance of the findings of the inspections and reports covering this latest incident has been reviewed with Health Physics personnel, cognizant supervision, plant review committees and Dhiryland management.
The Protected Area fenced boundary has also been redefined to create a boundary for the plant's restricted area.
No further evidence of conditions identified in the inspection report have been observed.
A qualified candidate for Health and Safety Supervisor was selected from among the Health Physics staff to fill the Health and Safety Supervisor position.
His assignment was effective February 23, 1981.
A replacement for the Health Physics Technician vacancy created by this promotion will made within the next few months.
Authorization for this response to be submitted beyond the twenty-five day reporting period was granded to Mr.
R.
E.
Shimshak by Mr. Morris Branch.
If there are any questions concerning this response, please contact us.
Very truly yours, DAIRYLAND POWER COOPERATIVE h
Frank Linder, General Manager FL:RES:af cc:- NRC Resident Inspectors
.3--
s e
Mr. W.
L.
Fisher LAC-7390 Acting Chief, Fuel Facility and February 27, 1981 Materials Safety Branch STATE OF WISCONSIN )
)
COUNTY OF LA CROSSE)
Personally came before me this N7I day of February, 1981, the
- above named Frank Linder, to me known to be the person who executed the foregoing instrument and acknowledged the same.
l j
{& i n v P
'./ /4 av Notary Public, La Crosse County, Wisconsin."
My Commission Expires 2/26/34
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