View source for 05000416/LER-1984-050, Corrected LER 84-050-03:on 841102,condition on 841015 Re Safe shutdown-related Cables Found W/Omitted Fire Rated Barriers Determined Outside Design Basis.Design Change Documents Initiated

{{Adams
| number = ML20134N957
| issue date = 08/15/1985
| title = Corrected LER 84-050-03:on 841102,condition on 841015 Re Safe shutdown-related Cables Found W/Omitted Fire Rated Barriers Determined Outside Design Basis.Design Change Documents Initiated
| author name = Byrd R, Dale L
| author affiliation = MISSISSIPPI POWER &amp; LIGHT CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF ADMINISTRATION (ADM)
| docket = 05000416
| license number = 
| contact person = 
| document report number = AECM-85-0249, AECM-85-249, LER-84-050-01, LER-84-50-1, NUDOCS 8509060083
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 4
}}
{{LER
| Title = Corrected LER 84-050-03:on 841102,condition on 841015 Re Safe shutdown-related Cables Found W/Omitted Fire Rated Barriers Determined Outside Design Basis.Design Change Documents Initiated
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000416
| LER year = 2084
| LER number = 50
| LER revision = 
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

=text=
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     ]vostre,                  ameTresomasse=asTri                             T] no                                                                                    l       l e i AcT ru s e.m              a..a          . an                  -       m.w no on October 15, 1984, during a special review, certain Unit 1 safe-shutdown                                                                                            j related cable raceways were found with omitted fire rated barriers. Although                                                                                          '
these fire barriers were required by 10 CFR 50 Appendix R and the plant FSAR, they were not included in construction documents. Two areas contair.ing these cable raceways were located on the Unit 2 side of the Control Building where the fire detection system had not been under surveillance. Due to the uncertainty of.the location of these raceways, fire watches in Unit 2 had not been established in a timely manner.
Subsequently, as a result of the continuing special review relative to Appendix R. additional Unit I safe-shutdown related cables were identified on December 12, 1984, as not being in compliance with Appendix R requirements.
Also, other Appendix R discrepancies were identified on May 17 and 18, 1985. A one hour fire wrap required to be installed along certain raceways was found                                                                                          i broken at various supports. One raceway in the Division I Switch Gear Room was found without a one hour fire barrier installed. Nonconformance documents were written for correction of the deficiencies. Fire watches will be maintained until fire protection is installed.
On July 12 1985, additional Appendix R discrepancies were identified. Three E77 system safe shutdown cables were found to have been routed through fire
(                sones without the required 3-hour fire wrap. Nonconformance documents were initiated to correct the deficiencies and fire watches will be maintained as required.
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J13AECM85080901 - 3

Attcchment to AECM-85/0249
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u,     ucua. ...utivo., ca LICENSEE EVENT REPORT ILER) TEXT CONTINUATION                                            areaoveo o.e no mes-eie.
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013 0 l2             0F       0 l3 varTn            . m          .an== =ses   .uwnn This is an update to a previous revision submitted June 17, 1985. Changes to the previous report are indicated by a bar in the right hand margin.
On October 15, 1984, during an ongoing Fire Protection System review relative to 10 CFR 50 Appendix R requirements, the design engineering group identified certain Unit 1 safe-shutdown related cable raceways with omitted fire barriers. A Material Nonconformance Report (MNCR) was initiated by engineering and reviewed by the Operations Shif t Superintendent for effects on operation. At 1600 hours on October 15, a Limiting Condition for Operation (LCO) report was written to track the hourly fire watch required by Technical Specification 3.7.7. Further information was later required to determine reportability under 10 CFR 50.73. On November 2, 1984, it was determined that this condition was outside the design basis of the plant and it was reported accordingly.
The affected safe-shutdown related cables were those of redundant trains unprotected by fire barriers. This condition is not in accordance with Appendix R requirements. Systems affected were: The Standby Service Water System (SSW), the SSW remote shutdown flow recorder, a Residual Heat Removal
;I           (RHR) jockey pump, the Standby Diesel Generator fuel oil transfer' pump, the
 '           Reactor Core Isolation Cooling System, SSW pump house ventilation, Safeguard Switchgear and Battery Room ventilation, ECCS pump room ventilation, and power feeders or control cables to ESF load centers.
After conferring with Engineering, on November 7, 1984, Operations discovered.
that two of the areas containing the subject cables were located on the Unit 2 side of the Control Building. It was later determined that the cables in one of the two areas met Appendix R requirerants. The fire detection equipment in the Unit 2 areas had not been under surveillance since Technical Specifications did not address these. Also, no fire watches had been established in these areas. Operations, when reviewing the MNCR on October 15, had assumed the cables were located in Unit 1. Fire watches in the Unit 1 Auxiliary and Control Buildings were already in offact due to the nonconforming fire doors reported in Special Report 84-012/2, AECM-84/0478.
Continuous fire watches were established in the Unit 2 areas after discovery of the conditioc. Design Change documents have been initiated to install the required fire barriers.
An engineering investigation revealed four more areas in Unit 2 which contained Unit I safety related components. However, these components were not safe-shutdown cables. The fire detectors in the areas were successfully tested on November 12 and 13, 1984. The fire detectors are being administrative 1y controlled as Technical Specification required instruments until a revised Technical Specification is issued.
J13AECM85080901 - 4 es e              _ __.                   _ _ _ _ _ __ _ _ _ _ ___ _ _ _ __ _ . _ _ _ _ .                                                _ _ _ _ _ _ _ _ _ .

Attachasnt to AECM-85/0249 3
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LICENSEE EVENT REPORT (LER) TEXT CONTINUATION                           w aoveo ono mo.s,s w ee
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In sunsnary, a total of six ateas containing Unit 1 safety related equipment                                                I l
were found located on the Unit 2 side of the Control Building. The fire detection equipment in the Unit 2 areas had not been un' der surveillance. One of the six areas contained safe-shutdown cable raceways with omitted fire barriers.
As a result of the continuing special review relative to Appendix R.
additional Unit I safe-shutdown related cables were identified on December 12, 1984, as not being in compliance with Appendix R requirements. These additional discrepancies were limited to Unit 1. Appropriate nonconformance l
docusedts were initiated and the appropriate Technical Specification actions were carried out. Systems affected by these deficiencies were Containment and Drywell Instrumentation, Emergency Switchgear and Battery Room Ventilation, the Standby Diesel Generators and Residual Heat Removal.
Other Appendix R discrepancies were identified on May 17 and 18, 1985. A one hour fire wrap required to be installed along certain raceways was found broken at various supports. The wrap was installed on either side of the supports but did not always include the portions where support members made contact with the M L raceways. Also, one raceway in the Division I Switchgear Room tras found without a one hour fire barrier installed. Nonconfermance documents were written for correction of the deficiencies. Fire watches will be maintained until the appropriate fire protection is installed.
i             On July 12, 1985 Nuclear Plant Engineericg identified additional Appendix R dicerepancies which were subsequently determined reportable on July 17, 1985.
Three 277 system safe shutdown cables were found to have been routed through                                                .
fire sones without the required 3-hour fire wrap. Nonconformance documents                                                  l I
were initiated to correct the deficiencies and fire watches will be maintained as required. This is submitted as a final report.                                                                           ,
4 2
J13AECM85080901 - 5
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j MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi 'n a ?3 n 9 ,* f Q 56hihMIMil        P. O. B OX 164 0, J AC K S O N, MIS SIS SIP PI 39215-1840 August' 15, 1985 tuCLE AR LICENSING & &AP ETY DEPARTMENT CORRECTED COPY Document Control Desk                                               LER number should be U. S. Nuclear Regulatory Comunission                                84-050-3 rather than Washington, D. C. 20555                                             85-050-3.
Gentlemen:

==SUBJECT:==
Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-29 File: 0260/L-835.0 Fire Barriers Omitted From Safe-Shutdown Related Cables LER 84-050-3 AECM-85/0249 Attached is Licenset. Event Report (LER) 84-050-3 which is a final report.
r-                                                                 Yours truly, L. F. Dale Director
             . RM/EBS/SHH:vog                                                                              i Attachment ec:     Mr. J. B. Richard (w/a)
Mr. O. D. Kingsley, Jr. (w/a)
Mr. R. B. McGehee (w/a)
Mr. N. S. Reynolds (w/a)
Mr. C. B. Taylor (w/o)
Mr. R. C. Butcher (w/a)
Mr. James M. Taylor, Director (w/a)
Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555                                                             ,
                      .Dr. J. Nelson Graces Regional Administrator (w/a)
U. S. Nuclear Regulatory Conunission Region Il a a          rgia   b33
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