IR 05000313/1979014
| ML19247A446 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 06/18/1979 |
| From: | Brown G, Everett R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML19247A436 | List: |
| References | |
| 50-313-79-14, NUDOCS 7907310552 | |
| Download: ML19247A446 (4) | |
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U. S. NUCLEAR REGULATORY COBDtISS10N OFFICE OF INSPECTION AND ENFORCEMENT
REGION IV
IE Inspection Report No. 50-313/79-14 License No. DPR-51 Docket No.
50-313 Licensee: Arkansas Power and Light Company (AP&L)
P. O. Box 551 Little Rock, Arkansas 72203 Facility: Artansas Nuclear One, unit one (ANO-1)
Location: Rustellville, Ackansas 72203 Inspection conducteu.
sune 7-8, 1979 b h,,
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2f Inspector:
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R. J. Everett, Radiatior. Specialist Dat/e ([/ h7 4
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m Approved by:-G.'D. Brcwn, Chief. Fuel Facility and Material' Dat'e u e Safety Branch Inspection Summary:
Inspection on June 7-8, 1979 (Report No. 50-313/79-14)
Areas Inspected:
Unannounced inspection of the gaseous radwaste system which included c, ration of the waste gas hold-up system; reports of gaseous effluent releases; effluent control instrumentation; and procedures for the release of gaseous effluent. The inspection involved thirteen (13) inspector-hours by one (1) hTC inspector.
Results: No items of nomcompliance or deviations were identified.
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Details 1.
Persons Contacted (AP&L)
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- J. P. O'Hanlon, Plant Manager
- B. A. Terwilliger, Operations Superintendent
- D. Snelling, Technical Support Engineer
- G. Fiser, Radiochemistry Supervisor
- Denotes those present at the exit interview.
2.
Scope of Inspection The purpose of the inspection was to review the use and operability of the licensee's degassifier and waste gas hold-up system and to review records of gaseous effluent releases and effluent instrumentation.
3.
Waste Gas Hold-up System The ANO-1 gaseous waste collection system is shown in figure 11-3 of the FSAR. Aerated low activity gases are collected in the gas collection header and after filtration are vented directly to the station vent plenum.
Primary systems vents and'the discharge from the degassifier are collected separately and after filtration and monitoring are Vented to the station vent plenum.
The inspector inquired as to the use and operability of the degassifier and waste gas hold-up system.
The licensee stated that the degaasifier and hold-up system were last used in June of 1978, and the condition of the fuel over the year has been such that degassification and hold-up was not nec-e s s a ry.
Without de.assification, rad-gas activities are essentially stored in the primary coola it.
Gases from primary vents would then be the major source of rad gas fr a the plant when operating normally.
The licensee indicated some difficulties with the operability of the degassifier and waste hold-up system but felt that the latter could be started up without too much difficulty. The inspector noted that the shut-down procedure had been changed to delete the use of the degassifier prior to shut-down on June 1, 1979.
The inspector noted that total primary coolant activities prior to shut-down were not excessive, being_1-2 microcuries per gram.
The Technical Specification limit is 78/E.
E has been in the range of 1-2 MEV per disintegration. The hydrogen concentration in the coolant on March 30, 1979 was 20 ml/ liter.
The inspector noted that the use of the degassifier and waste gas hold-up system is not mentioned in the Technical Specifications (TS), only release rates of gaseous and other activities from the plant.
Records indicate no difficulty in meeting the gaseous release rates from the plant since August, 1978.
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The inspector concluded that the use or non-use of the degassifier and waste gas hold-up system was not safety related and the amount of gaseous activity released from the plant under normal operating conditions is not directly related to the use of these components.
The inspector compared the licensee's mode of operation with the narrative and intent of the FSAR.
Section 11.1.3.2 describes the gaseous radwaste system and it is clear that gases primary vents and the degassifier can be filtered, monitored and discharged to the atmosphere without the use of the waste gas hold-up systen.
The use of the degassifier is not made clear and it is concluded that the use of the degassifier is optional.
The back-up role for the waste hold-up system is clear.
Should the activity in discharge header become too high, the discharge valve will close and gases stored in the surge tank until the compressors are started to compress and store the gas in the decay tanks.
The inspector stated that start-up, operating and shutdown procedures are inconsistent with the FSAR narrative in that there is no regiirement to verify that the waste gas system is operable, and therefore able to perform its intended function.
The licensee stated that an investigative team from AP&L had been seltited and charged with evaluating and improving the relia-bility of the degassifier and waste gas hold-up system, and precedures would be reviewed and revised as necessary to require that the waste gas hold-up system be operable under all conditions where gas activities might be too high in the discharge header.
The inspector stated that this item would remain unresolved (79-14/1) pending completion of the AP&L study and a NRC review of study findings and procedures that reflect operability of the waste gas sJstem.
Gaseous Effluent Monitoring 1he inspector reviewed the type, location and calibration of two gaseous effluent monitors.
Monitor RE-4830 is located in the discharge header just downstream of the gaseous waste discharge valve.
Monitor RE-7400 is located in the station vent plenum and monitors all gases prior to release to the plant vent.
Both monitors are NAI scintillation detectors which are calibrated periodically with standard KR-85 gas.
The inspector reviewed the calibrations of May, 1979 and the alarm set points for each monitor.
The inspector had no further questions in this area at this time.
5.
Gaseous Effluent Releases The inspector reviewed records pertaining to puraes of the reactor building.
Two purges have been made in 1979 These records indicated compliance with release rates specified in scct;an 2.4.2 of the T.S.
The inspector reviewed procedure 1604.14 revision 4 which covers calculations, procedures and documentation of reactor building purges. The inspectcc had no further questions in this area at this time.
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6.
Unresolved Items Unresolved items are matters about whica more information is required in order to ascertain whether they are acceptable items, items of non-compliance, or deviations.
An unresolved item disclosed during the inspection is discussei in paragraph 3.
7.
Exit Interview The inspector met with AP&L representatives (denoted in paragraph 1) at the ANO-1 site, iollowing the conclusion of the inspection on June 8, 1979.
The inspector summarized the purpose and scope of the inspection, and discussed the inspection findings.
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