ML20237H707

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Forwards Insp Rept 50-423/87-12 on 870512-0710.No Violations Noted.Unresolved Item Re Discharge of Carbon Dioxide Fire Protection Sys Into Rod Control Switch Gear Area on 870706 Noted.Reactor Trip on 870514 Handled in Prof Manner
ML20237H707
Person / Time
Site: Millstone Dominion icon.png
Issue date: 08/10/1987
From: Wenzinger E
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To: Mroczka E
NORTHEAST NUCLEAR ENERGY CO.
Shared Package
ML20237H709 List:
References
NUDOCS 8708170319
Download: ML20237H707 (2)


See also: IR 05000423/1987012

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AUG 101987

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Docket / License: 50-423/NPF-49

Northeast Nuclear Energy Company

ATTN:

Mr. Edward J. Mroczka

Senior Vice President, Nuclear

Engineering and Operations

P.O. Box 270

Hartford, Connecticut

06101-0270

Gentlemen:

Subject:

Millstone 3 Routine Inspection 50-423/'.7-12 (5/12/87 - 7/10/87)

This transmits the report of the above subject inspection by Mr. J. T. Shedlosky.

The inspection findings have been discussed with Mr. C. H. Clement of your staff.

No violations were identified during this inspection and no reply to this letter

is required.

However, we are concerned about the discharge of the Carbon Dioxide

fire protection system into the East MCC Rod Control Switchgear area on July 6.

This incident is addressed in the enclosed inspection report and your corrective

actions will ba inspected relative to the associated Unresolved Item.

During our onsite inspection of the May 14 reactor trip, we noted that prompt

action was taken by the Computer Services Group in response to discovery of a

possible tie between the process computer and reactor safeguards equipment.

Our

inspector found this issue to have been handled very professionally.

We have reviewed your May 1, 1987 letter responding to a Violation identified in

our Inspection Report Number 50-423/86-39.

Your letter addressed the root cause,

corrective actions, and generic implications for an incident which caused a safety

injection pump to be degraded.

We have examined your actions during onsite in-

spections and have no additional questions.

We have also reviewed your letter dated May 12, 1987 responding to a Violation

identified in our combined Inspection Report Number 50-245/87-02; 50-336/87-02;

50-423/87-03.

Your letter addressed the root cause and corrective actions for a

Violation in which a Safeguards information container was unlocked and unattended.

We have examined your actions during onsite inspections and have no additional

questions.

Thank you for your cooperation.

Sincerely

N181aal Signed Byi

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dward C. Wenzinger, Chief

rojects Branch No. 3

Division of Reactor Projects

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AUG 101987

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' Enclosure: 'NRC Region I Inspection Report 50-423/87-12

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cc w/ encl:

W. D. Romberg, Vice President, Nuclear Operations

D. O. Nordquist, Manager of Quality Assurance

R. M. Kacich, Manager, Generation Facilities Licensing

S. E. Scace, Station Superintendent

Public Document Room (PDR)

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Local'Public Document Room (LPDR)

Nuclear Safety Information Center (NSIC)

NRC Senior. Resident. Inspector

State of Connecticut

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Region I Docket Rnom (with' concurrences)

Management Assistant, DRMA (w/o encl)

DRP Section Chief

J. Beall, SRI, BV-2

T. Rebelowski, SRI, Millstone'l&2

R. Ferguson, LPM, NRR

R. Bores, DRSS

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