IR 05000336/1985020

Insp Rept 50-336/85-20 on 850603-06.No Violation Noted.Major Areas Inspected:Shield Storage,Cask Washdown Pit Filter Changeout Svc Water Hydrostatic Pressure Test & Surveillance Test Procedure Review

ML20128K202
Person / Time
Site:	Millstone
Issue date:	07/01/1985
From:	Mccabe E, Robertson J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
Shared Package
ML20128K143	List: IR 05000336/1985020 ML20128K138
References
50-336-85-20, NUDOCS 8507240064
Download: ML20128K202 (3)

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i- l U.S. NUCLEAR REGULATORY COMISSION

REGION I

Report No.: 50-330/85-20 Docket No.: 50-336 License No.: DRP-65 Licensee: Northeast Nuclear Energy Company P. O. Box 270 Hartford, Connecticut 06101 Facility Name: Millstone Nuclear Power Station, Unit 2 Inspection Conducted: June 3-6, 1985 Inspector: M AiLQh Idwls26 J. g @ eftsch, Reactor Engineer Date Approved by: lia 60.4t r l i I es-E. C. McCabe, Chief, Reactor Projects Section 3B Date Inspection Summary:

Routine safety inspection (29 hours3.356481e-4 days <br />0.00806 hours <br />4.794974e-5 weeks <br />1.10345e-5 months <br />) of thermal shield storage, cask washdown pit filter changeout, service water hydrostatic pressure test, surveillance test pro-cedure reviews, and plant tour No unacceptable conditions were observe .

8507240064 850703-PDR ADOCK 05000336 O PDR L_______--_________

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l DETAILS 1. Thermal Shield Storage The thermal shield was removed from the reactor vessel during the 1983 re-fueling / maintenance outage. It was reduced to chips and stored under water in the cask washdown pit in the storage pool area of the auxiliary buildin The chips were contained by basket The baskets are placed in a metal liner and cement is pumped on and around the basket to encase the chips. The solidification process is performed in-side a lead Nupac cask. After the cement has hardened, the liner is trans-ferred to a concrete storage cask which is placed in a yard storage are The inspector observed the transfer of the solidified thermal shield chips from the lead cask to the concrete storage cask. This operation was performed with good coordination between contractor and licensee personne HP's were present at both the 14'-6" and 38'-6" levels of the auxiliary building to monitor radiation levels. Adequate controls were in place to minimize expo-sure to personnel in the immediate and adjacent area The cask, which was 10-20 mr on contact, was transported to a yard storage area that has a radiation area boundar Presently, the licensee has 4 casks containing thermal shield chips in yard storage where they will be kept until transported offsite to a permanent burial sit No concerns were identifie . Service water Hydrostatic Pressure Test A hydrostatic pressure test of the service water system must be performed every ten years to meet ASME boiler and pressure vessel code The inspector verified that Technical Specifications required for the service water header operability were met during the performance of the test. The official test gage had the range and accuracy specified in the test procedure and met the calibration requirement The test identified leakage at two mechanical joints and one weld in the ser-vice water system. The leakage was documented, corrected, and satisfactorily retested. A deficiency was also discovered on the manual operator of a ser-vice water valve that is also air operated. Although this did not affect the test, it was properly documented on a trouble repor At various times during the four hour test the inspector verified test pres-sure was being maintained at the value specified by the procedur No concerns were identified.

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1 Cask Washdown Pit Filter Changeouts The inspectorfobserved the changeout of the water filters in the cask washdown pit in the storage pool' area of the auxiliary building. The operation was performed smoothly and efficiently. Radiological controls were adequate and preplanning was effective at minimizing personnel exposure.

Filters were returned to service at the completion of the maintenance.

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,No concerns were identifie . Procedure Review t

f A review was: performed on the following procedures:

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EN 21173, Service Water Hydrostatic Pressure Test

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SP 2613C, Engineered Safety Feature Systems -Integrated Test

.-- ' ' SP 2402I, LT/0P Circuit Functional Test

~ These procedures were found to be technically adequate. They contained the i necessary prerequisites and acceptance criteria. When required, personnel qualifications were specified. . Test l data forms would provide useful and un-i derstandable information.'

Procedures were annotated to identify test changes and changes had the re-quired review and' approval signature No concerns-were identified.

2 Facility Tours The following tours and observations were mad Toured containment, auxiliary building, pump house intake structure, and

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turbine ~ building. ' General material condition, housekeeping, and fire protection was satisfactor _ Toured yard storage area within radiation area boundary. Observed load-ing of 55 gallon ' drums of waste material for transport offsit No con-' ,

cerns were identifie l Reviewed recent control room logs and records. Operators were aware of 'I

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scheduled'and current test status. No concerns'were identifie . Exit Meeting The inspector met with the Unit Superintendent on June 6,1985 ~and summarized'

the scope and findings ~of the inspection activities.'. No proprietary informa -

tion'was identified as being included in this-report'.

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