IR 05000155/1975016
| ML20002D753 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 12/15/1975 |
| From: | Charles Brown, Little W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20002D751 | List: |
| References | |
| 50-155-75-16, NUDOCS 8101220314 | |
| Download: ML20002D753 (6) | |
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U. S. NUCLEAR REGULATORY C0:0!ISSION
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OFFICE OF INSPECTION AND ENFORCD!ENT
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. REGION III
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Report of Operations Inspection
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IE_ Inspection Report No.' 050-155/75-16 t
Licensee:
Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201
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~ Big Rock Point-Nuclear Plant ~
License No. DPR-6 Charlevoix, Michigan Category: C
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Typeiof'Liccnsee:
Special, Announced
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Dates of Inspection:
November 19-21, 1975
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s Principal Inspector: g H. Erown (Date)
f Accompanying Inspectors: None Other Accompanying Personnel: None
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Reviewed By:
W.-S.
Littic, c#c, ion Leader
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Nuc1 car Support i
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SUMMART OF FINDINCS '
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Inspection Summary
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Inspection on November 19-21 (75-16):
Reviewed proposed fire seals for penetrations in valls and floors.'outsidef the containment; cork..
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. control and cecrgency procedures; fire protection and proposed detection.
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No' fire hazards were noted on, tour.-
Enforcement Items
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None.
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Licensee Action on Previously Identificd' Enforcement Itens.
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Not in the scope of this inspection.
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Other Significant Items
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Systens and' Components
None.
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Fa:ility Items (Plans'and Procedures) -
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-Fire' seals and fire' detector installation is to'be perforned during January 1976 outage.
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Managerial Items
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None.
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Noncompliance Identified and Corrected *by the Licensee.
None.
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Deviations None.
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'New Unresolved Items 1.
Qualification of Penetration Scalant' Material
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i Determine the af f ect lof an improper mix ratio of the two i
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liquids that produce the foam seal on.the scalant flanaability.
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[ Confirm that a visual' comparison of cured saeples verify thc' proper mix ratio.
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Evaluate the'potentiai for inhibitors' preventing the
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the proper: cure of the foam.
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.d.
Develop' acceptance criterion for the sealed penetrations.
(Report Details,' Paragraph 3)
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Status of Previously Reported-Unresolved Items
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None.
r Managceent Interviev
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Following the inspection,_a aceting vas-held on Novenber 21, 1975,.
vith l'.r. Hartran, Plant Superintendent and other senbers of his staff.
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The following ite=s were included in. the discussion.
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The inspector discussed _ the new unresolved itens_ pertaining to the '
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fire' scal insta11stion.
The~. licensec, acknowledged the. co--ents and -
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stated that the.itens vould be referred to their' headquarters.
(Report Details ~,- Paragraph 3)
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The inspector inquired as 'to VLo performs the final verification.
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check when velding or burning has_been perfortted near cables,.as in i.he case of 'the RDS installation. The licensce stated that:in:
this ins'tince the contractor QA procedures final step is t,he-inspection.
that.the fire vacch qualifications are not.
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The inspector. state specified. _The qualifications should be equal f_cr licensec er
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contractor personnel. The licensee stated that' this iten vould be reviewed.
(Report Details, Paragraph 2)
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REPORT DETAILS
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1.
Persons Contacted C. Ilartman, Plant Superintendent R. Abel, Operations Superintendent hhh G. Tyson, Maintenance Superintenden y gglul D. DeMoore, Technical Engirecr S. }brtin, Engineer E. McNamara, Shift Supervisor
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V. Avery, Shift Supervisor
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D. Targgart, Project QA, Electrical Plant Projects W. Clark, CP Co. CPMD G. Dziedzic, QA/0C Iaspector 2.
Findings A tour was taken by the inspector of the control roon, penetrati:n room and electrical equip =cnt room.
The centrol of fire ha:srds appears to be satisfactory.
Scre dust uas noted in the centrel room panels. The placement cf fire seals is to be perfer.si during the upccring Ja'nua~ry 1976 cutage. The seals are tr.1,e made of silicone rubber foam that vill be foaned in-placc.iJ
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Forns are to be corstructed of fiber glass then required. QA 'QC verification by procedures appears to be adequate for centr:1
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except as discussed in paragrapns 3.a and 3.c.
Any vork pt:kages prepared offsite are revicwed and approved by the PEC.
The requirements for the review have recently been nade erre detailed
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and any nodification is considered to be saf ety related until ths PRC has specifically found it to be otherwisc.2/
Onsite personnel are familar uith the emergency procedures. The
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offsite personnel receive initial lectures en site cr.ergency procedures. The licensec stated a revieu could be nade cf the training of personnel that would be used for fire uatches and the training upgradc-3 as necessary. The contractor presently at the facility holds weekl, safety meeting (rcquirenents of 05EA) and one September nceting was conducted by one of the licensee's personnel covering fire equipment'and fire fighting at the facility.
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3.
Fire Stops
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The fire stops are scheduled to be formed during the January 1976 outage by a cor. tractor. The fire stops (seals) are to be ecnstructe.d of foamed-in-place siliconc rubber (Dow Corning Q3-654S) ar.d gaps
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See paragraph 3.
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See corrective action A0-24-75.
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of less.than 1" coulked with Dow Corning RTV-96-081. The foam
The toduced-when two liquids are nixed and allowed to cure.
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d fc owing information was contained in tbc contractor s proce ure.
The loom was tested per ASTM E 119-73 fire endurance test for 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> by Factory Mutual Research Corp.3/ with acceptabic results.
The test was performed with the two liquids thoroughly mixed in a 1:1 ratio and properly cured. During the curing hydrogen is evolved and the reaction is mildly exothermic.4/ The vendor's data shows 6 volumes of hydrogen evolved in 100 minutes and a total of 8.4 volumes evolved
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in 500 minutes.
No data was available as to acceptability of the foam with any variation from the 1:1 mix ratio or if the cure was inhibited by
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several compounds contained in some RTV and cabling insulation forraulas. Inhibiting chemicals are stated in vendor literature for-the foam. The two liquids have the following properitics (partial list).
Component A Compcnent B
Flash point 470 F 270 F
Flame point 6500F 390 F The flammability data for properly mixed and cured foam is as follows:
Time in Flame &
& vt Ioss Glow out
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Flame
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15 sec 7.2 see 1.3%
60 see 15.6 see 13.5%
The contractor's procedure contained requirements for ventilation to remove the hydrogen evolved, and the verification of the f oam in the seal by visually cxamination of a sample as compared to a standard.of a known 1:1 mix ratio.
The inspector stated his concerns in the following areas and that these would be carried as unresolved items in the report:
There was no acceptance criterion for -the visual comparison a.
of the foam sampics. Also there was no stateraent that. the visual comparison verified a proper mix and acceptabic flammability.
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As both liquids present a fire hazard, would the mix be a fire hazard if the cure was. inhibited?
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Factory Mutual Report Serial No. 24963.
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Approximately 20 C rise internally.
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P00R ORIGINAL
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t If the cure was inhibited around the cabling, would the c.
scal be a:ceptabic?
Other areas of concern were:
What precautions are to be taken to prevent damage to vital equipment by the acetic acid evolved as the RTV cures?
Ilov is the trimming of the foam to be accomplished?
The licensee stated that these items would be referred to their
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licad quar t ers.
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4.
Fire Detection A fire detcetion systen is to be installed during the upcoming outage. Thi3 system is alarned in the control room and covers 3 zones: electrical equipment / compressor room; sphcre penetration room; and cabic area in the sphere. The detectors are of the ionization type with an installed alare to indicate when that detector has alarmed.
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Work Contrcl Procedures i
The work control proccdures appear to be satisfactory.
Changes and modifications prepared offsite are also revicued and approred by the 'P.C.
The QA personnel periodically revice vork in progress to assure procedures are being follored. There is no specific requirement for operations to be notified if a job is restarted.
The licensee stated that the inconplete work package maintains sufficient control.
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6.
Emergency Procedures The emergency procedures were briefly reviewed and no cajor area of concern noted. Fires in vital area and methods of control are discussed. The Shift Supervisor is directed to go to the scene of the firc as the man in charge.
The licensee stated that a note would be added to remind the supervisor that he still was in charge of the overall operation of the plant.
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Maintenance of Seals The licensec is evaluating methods of repair and' materials to be used in the seals af ter they are installed.
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Fire Drills
The fire drills have not been separated from other emergency dril...
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The licensee stated that this area would be reviewed for appropriate changes. The fire brigade is traJned in ffrc fightinn.
It appears
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