ML20042G822
| ML20042G822 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 05/10/1990 |
| From: | Tucker H DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20042G823 | List: |
| References | |
| NUDOCS 9005160136 | |
| Download: ML20042G822 (3) | |
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\\1cr hesident Ourlotte, N C lM42 Nucker Production (TN)373-4Lil DUKEPOWER May 10, 1990 U.S. Nuclear Regulatory Commission ATI'N: Documsat Control Desk Washington, D.C.
20555 Subjects McGuire Nuclear Station, Units 1 and 2 Docket Nos. 50-369 and 370 Supplement to Technical Specification kendment, 4.6.1.8, Annulus Ventilation System Gentlement By letter dated May 9, 1990, I submitted a proposed license amendment to facility operating license NPF-9 for McGuire Nuclear Station Unit 1.
Because the McGuire Unit 1 and 2 Technical Specifications (TS) share a common document, our submittal should have also requested an amendment to Unit 2 to reflect this purely administrative change. No technical.or substantive changes are being made to Unit 2.
Therefore, as discussed with Mr. D.S. Ilood of NRC Project Management, during a telephone conversation on May 10, 1990, we request this change also be included.
Mr. Ilood requested additional information regarding the events that led to our emergency TS request. Around mid-April 1990, we determined the problem
- i existed at our Catawba facility. The problem was discovered by the Catawba llVAC Task Force which is reviewing Catawba llVAC systems in parallel with our Design Basis Documentation efforts. Subsequently, a TS request for the Catawba Annulus Ventilation (VE) system was submitted on April 23, 1990. On April 27, 1990 a review of the McGuire VE system was initiated to determine if the same problem existed. Following an initial Design Engineering review, on May 3, 1990, additional performance data was requested to determine operating conditions on Unit 1 and 2 with respect to the postulated degraded grid voltage condition. We determined'that Unit 2 could operate with a decreased VE system flowrate tolerance, but that the Unit i VE system would be inoperable if additional actions could not be taken to raise system flowrates to an acceptable level. Our Regulatory Compliance staff was notified that a possible emergency TS condition may exist. By the evening of May 4, we determined that we would need to pursue a TS revision.
On Monday morning, May 7, we contacted the NRC staff and notified them of the need for the TS amendment, and provided them an update of our situation.
In conclusion, our emergency TS amendment request could not have been
. avoided. It was created by the self-recognition of the previously mentioned degraded grid voltage condition. We believe our actions have been timely.
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- A'lW : Document Control Desk May 10, 1990 Page 2 Additionally, find attached a correction to the previous submittal in the form of a hant. marked TS pe;c as discussed with Mr. Hood.
1:
Pursuant to 10 CFR 50.91(b)(1), the appropriate North Carolitia official is also being provided a copy of this request.
If there are any que;stions, please contact S.E. LeRoy at. (704).373-6233.
Very truly yours, ba x
Hal B. Tucker Attachment SEl.544 xc
_Mr. S.D. Ebneter, Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. Dayne Brown, Chief Radiation Protection Branch Division of Facility Services Department uf fluman Resources 701 Barbour Drive Raicigh, N.C.
27603-2008 Mr. Darl llood, NRC Project Manager Office of Nucicar Reactor Regulation I
U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. P.K. Van Doorn NRC Senior Resident Inspector' d
McGuire Nucicar Station k
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N.S. Nucicar Regulatory Cormission.
NITNt Document Control Desk May 10, 1990 Attachment l
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