ML17053C384

Approves 800807 Request for Completion Date Extension Re Mods for Protection Sys & Shutdown Panel Until 810930,for Sprinkler Sys Until 810530 & for Ventilation Duct Penetration Until Spring 1981 Refueling.Fr Notice Encl

ML17053C384
Person / Time
Site:	Nine Mile Point
Issue date:	02/13/1981
From:	Harold Denton Office of Nuclear Reactor Regulation
To:	Dise D NIAGARA MOHAWK POWER CORP.
Shared Package
ML17053C385	List: ML17053C384 ML17053C386
References
NUDOCS 8103060406
Download: ML17053C384 (18)

Text

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~ l Docket No. 50-220 Mr. Donald P. Disc Vice President - Engineering c/o Hiss Catherine R. Seibert Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202

SUBJECT:

FIRE PROTECTION SCHEDULAR RELIEF - NINE MILE POINT (UNIT 1)

NUCLEAR POWER PLANT We have completed our review of your letter dated December 31, 1980.

In essence, you requested schedular relief for four fire protection modifications, three of which had been previously addressed by your lette~ dated August 7, 1980.

We have reviewed your submittals and have decided to grant the requested extension in accordance with 10 CFR 50.48(d).

Schedular relief was requested for four Safety Evaluation Report (SER)

Items:

(1) Protection (Detection)

System (SER Item 3.1.1),

(2) Shutdown Panel (SER Item 3.1.7),

(3) Sprinkler System (SER Item 3.1.2),

and (4)

Ventilation Duct Penetrations (SER Item 3.1A(5) ).

These items are specifically discussed in the following paragraphs.

In general, a

significant amount of fire protection work has already been accomplished at the Nine Mile Point Nuclear Plant.

These include separation by three hour fire barriers, fire retardant materials on cables, etc.

These modifications have already lowered the probability of a fire causing damage to equipment required to shut down.

Additionally, the design of Nine Mile Point 1 is conservative with respect to separation of redundant safety related components.

OFFICE/

SURNAME/

OAVEf>

Extension of the detection system completion date from the Spring 1981 refueling outage to September 30, 1981 was requested.

According to the licensee the amount of engineering required for the development of an adequate detection system was originally underestimated.

Testing was first required to determine detector location requirements.

These

tests, and subsequent acceptance by the American Nuclear Insurers, required approximately four to six weeks.

Additionally, since certain components of the detection and control systems are required to be seismically qualified, to prevent damage to adjacent safety-related e ui ment ion er lead times than ori inall antici ated were re uired.

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C In order to ensure public health and safety compensatory measures'ill be taken pr ior to detection system completion.

A high degree of early warning is already provided by normal plant tours.

Security personnel make hourly tours of all main buildings within the plant.

Operating and maintenance personnel make irregular tours for various reasons.

The possibility of a fire going undetected from transient storage of flammable material and by welding and cutting has been reduced signifi-cantly.

Procedures are in place to control these possibilities.

When it is necessary to weld or cut, a fire watch is provided.

Detection is planned to be completed as originally designed shortly after startup but no later than September 30, 1981. If equipment arrives on site earlier than expected modifications will be completed within 30 days of arrival.

The licensee requested an extension of time from the SER completion date of Spring 1981 refueling until September 30, 1981.

The licensee has indicated that, although the design is complete, certain components for the panel are long lead time items.

To comply with the recommended post-Three Mile Island human factor engineering

concepts, Niagara Mohawk has attempted to use the same type of controls on the shutdown panel as those used in the main control room panels.

Since these control switches are not high demand items, deliveries;

however, schedules are still uncertain.

Equipment requiring plant shutdown will be installed during the Spring 1981 refueling outage.

The remaining equipment will be installed within 90 days of arrival at the Nine Mile site.

Compensatory measures have been taken until modifications are complete.

In order to concurrently shutdown the plant while fighting fires staffing requirements necessitate nine qualified personnel.

This staffing require-ment will be satisfied until the shutdown panel is installed.

Four operators are required in accordance with plant operating procedure No.

11 to safely shutdown the facility.

The operating foreman co-ordinates the effort by installed (fixed) and portable communication system.

The actions necessary involve:

( 1) De-energizing the MG sets for the reactor trip bus, (2) Manually opening the emergency condenser return valves, and (3) h1onitor ing reactor core paramiters.

Five individuals are also necessary to fight fires, i.e., three plant operators and two security guards trained in fire protection. If the shutdown panel were installed the required number of plant operators could be reduced to two.

However, until the panel is installed and operable Niagara Mohawk will ensure that plant operators are always available for fire fighting.

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4, S rinkler S stem Niagara Mohawk requested an extension of the sprinkler system completion date until May 30, 1981.

In support of this the licensee has indicated that the design of the sprinkler systems required more engineering than anticipated.

The concept required extensive design review by Niagara Mohawk and the American Nuclear Insurers.

A schedule extension through May 30, 1981 will provide the flexibilityrequired to coordinate all Fire Protection and refueling outage modifications.

Compensating factors will ensure safety plant operation until completion of modifications.

All sprinkler zones are planned to be completed by February 17, 1981 but no later than the end of the refueling outage.

Zones originally designed as wet pipe systems will be made operational at that time.

Zones designed for pre-action will not be operational as originally designed until the detection system is complete.

However, by February 17, 1981, but no later than the end of the refueling outage, unit procedures will be in place for manual operation or sprinklers will be made operational as wet systems.

In addition to sprinkler systems, manual fire hose stations have been installed at Nine Mile Point Unit 1 so that any location int,the plant can be reached with a 100 ft. hose.

Although not an automatic system, these hose stations provide a satisfactory means of extinguishing fire.

Yentilation Duct Penetrations Niagara Mohawk has requested that completion of ventilation modifications be extended to the spring refueling outage.

In support of this the licensee indicated that the ventilation duct penetrations are being accomplished, along with ventilation modifications required per Section 4.4. 1 - Smoke Removal.

The modifications for Section 4.4.1 are not scheduled to be installed until the spring 1981 refueling outage.

In August 1980, Niagara Mohawk believed that all the ventilation modifi-cations would be completed by the end of the year.

However, delays were experienced)in the bid and award period which were beyond their control.

In the 'event that equipment is delivered to the site early, modifications will be completed within 30 days of arrival.

Public health and safety are ensured prior to ventilation modifications by structural improvements.

These structural modifications, previously completed, provide a significant reduction in the possibility of fire spreading from one fire zone to another.

It is planned that dampers will be installed by February 17, 1981 but no later than the end of the refueling outage.

OFFICE/

SURNAME)

OATEf>

NRC FORM 3I8 IIO/80) NRCM 0240 OFFICIAL RECORD COPY

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Nr. Donald P. Disc iO Based on our review, we conclude that you have shown good cause for extending the completion dates, and that the public health and safety is not adversely affected by such extension.

Accordingly, pursuant to 10 CFR 50.48(d) the completion dates have been extended as follows:

(1) Protection System - September 30, 1981, (2) Shutdown Panel-September 30, 1981, (3) Sprinkler System - ttay 30, 1981, and (4) Ventilation Duct Penetrations

- Spring 1981 Refueling Outage.

A copy of the related Notice of Extension, which is being forwarded to the Office of the Federal Register for publication, is enclosed.

Sincerely, Original Signed Bii K.G.Cara.

arold R. Denton, Director Office of Nuclear Reactor Regulation

Enclosure:

Notice of Extension cc w/encl:

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Docket Ho. 50-220 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, O. C. 20555 February 13, 1981 Mr. Donald P. Disc Vice President - Engineering c/o Miss Catherine R. Seibert Niagara Mohawk Power Corporation 300 Erie.Boulevard West

Syracuse, New York 13202

SUBJECT:

FIRE PROTECTION SCHEDULAR RELIEF - NINE MILE POINT (UNIT 1)

NUCLEAR POWER PLANT We have completed our. review of your letter dated December 31, 1980.

In essence, you requested schedular relief for four fire protection modifications, three of which had been previously addressed by your letter 'dated August 7, 1980.

We have reviewed your submittals and have decided to grant the requested extension in accordance with 10 CFR 50.48(d).

Schedular relief was requested for four Safety Evaluation Report (SER)

Items:

(1) Protection (Detection)

System (SER Item 3.1.1),

(2) Shutdown Panel (SER Item 3.1.7),

(3) Sprinkler System (SER Item 3.1.2),

and (4)

Ventilation Duct Penetrations (SER Item 3.1.4(5)).

These items are specifically discussed in the following. paragraphs.

In general, a

significant amount of fire protection work has already been accomplished at the Nine Mile Point Nuclear Plant.

These include separation by three hour fire barriers, fire retardant mat rials on cables, etc.

These modifications have already lowered the probability of a fire causing damage to equipment required to shut down.

Additionally, the design of Nine Mile Point 1 is conservative with respect to separation of redundant safety related components.

1.

Detection System Fxtension of the detection system completion date from the Spring 1981 refueling outage to September,30, 1981 was requested.

According to the licensee the amount of engineering required for the development of an adequate detection system was originally underestimated.

Testing was first required to determine detector location requirements.

These

tests, and subsequent acceptance by the American Nuclear Insurers, required approximately four.to six weeks.

Additionally, since certain components of the detection and control systems are required to be seismically qualified, to prevent daIIIage to adjacent safety-related equipment, longer lead times than originally-anticipated were required.

1

Mr. Donald P. Disc February 13, 1981 In order to ensure public health and safety compensatory measures will be taken prior to detection system completion.

A high degree of early warning is already provided by normal plant tours.

Security personnel make hourly tours of all main bui.ldings within the plant.

Operating and maintenance personnel make irregular tours for various reasons.

The possibility of a fire going undetected from transient storage of flammable material and by welding and cutting has been reduced signifi-cantly.

Procedures are in place to control these possibilities.

When

. it is necessary to weld or cut, a fire watch is provided.

I Detectioh:is planned to be completed as originally designed shortly after startup but no later than September 30, 1981. If equipment arrives on site earlier than expected modifications will be completed within 30'ays of arrival.

2.

The licensee requested an extension of time from the SER completion date of Spring 1981 refueling until September 30, 1981.

The licensee has indicated that, although the design is complete, certain components for the panel are long lead time items.

To comply with the recommended post-Three Mile Island human factor engineering

concepts, Niagara Mohawk has attempted to use the same type of controls on the shutdown panel as those used in the main control room panels.

Since these control switches are not high demand items, deliveries;

however, schedules are still uncertain.

Equipment requiring plant shutdown will be installed during the Spring 1981 refueling outage.

The remaining equipment will be installed within 90 days of arrival at the Nine Mile site.

Compensatory measures have been taken until modifications are complete.

In order to concurrently shutdown the plant while fighting fires staffing requirements necessitate nine qualified personnel.

This staffing require-ment will be satisfied until the shutdown panel is installed.

Four operators are required in accordance with plant operating procedure No.

11 to safely shutdown the facility.

The operating foreman co-ordinates the effort by installed (fixed) and portable communication system.

The actions necessary involve:

( 1) De-energizing the MG sets for the reactor trip bus, (2) Manually opening the emergency condenser return valves, and (3) Monitoring reactor core paramiters.

'ive individuals are also necessary to fight fires, i.e., three plant operators and two security guards trained in fire protection. If the shutdown panel were installed the required number of plant operators could be reduced to two.

However, until the panel is installed and operable Niagara Mohawk will ensure that plant operators are always available for fire fighting.

Mr. Donald P. Disc February 13, 1981 3.

rinkler S stem Niagara Mohawk requested an extension of the sprinkler system completion date until May 30, 1981.

In support of this the licensee has indicated

'that the design of the sprinkler systems required more engineering than anticipated.

The concept required extensive design review by Niagara Mohawk and the American Nuclear Insurers A schedule extension through May 30, 1981 will provide the flexibilityrequi red to coordinate all

. Fire Protection and refueling outage modifications.

Compensating factors will ensure safety plant operation unti1 completion of modifications.

All sprinkler zones are planned to be completed by February 17, 1981 but no later than the end of the refueling outage.

Zones originally designed as wet pipe systems will be made operational at that time.

Zones designed for pre-action will not be= operational as originally designed until the detection system is complete.

However, by February 17, 1981,'ut no later than the end of the refueling outage, unit procedures will be in place for manual operation. or sprinklers will

.be made operational as wet systems.

In addition to sprinkler systems, manual fire hose stations have been installed at Nine Mile Point Unit 1

so that any location in the plant can be reached with a 100 ft. hose.

Although not an automatic system, these hose stations provide a satisfactory means of extinguishing fire.

4.

Yentilation Duct Penetrations

~ Niagara Mohawk has requested that completion of ventilation modifications be extended to the spring refueling outage.

'In support of tliis the licensee indicated that the ventilation duct penetrations are being acComplished, along with ventilation modifications required per Section 4.4.

1 - Smoke Removal.

The modifications for Section 4.4.1 are not scheduled to be installed until the spring 1981 refueling outage.

In August 1980, Niagara Mohawk believed that all the ventilation modifi-cations would'e completed by the end of the year.

However, delays were experienced in the bid and award period which were beyond their control.

In the event that equipment is delivered to the site early, modifications will be completed within 30 days of arrival.

Public health and safety are ensured prior to ventilation modifications by structural improvements.

These structural modifications,.previously completed, provide a significant reduction in the possibility of fire spreading from one fire zone to another.

It is planned that dampers will be installed by February 17, 1981 but no later than the end of the refueling outage.

~

Mr. Donald P.

Disc 4'-

February 13, 1981 Based on our review:, we conclude that you haye shown good cause for extending the completion dates, and that the public health. and safety is not adversely affected by suck extension.

Accordingly, pursuant to 10 CFR 50.48(d) the completion dates have been extended as follows:

(1) Protection System - September 30,

1981, (2) Shutdown Panel -

September 30, 1981, (3) Sprinkler System - May 30, 1981, and (4) Ventilation Duct Penetrations

- Spring 1981 Refueling Outage.

A.copy of the related Notice of Extension, which is being forwarded to the Office of the Federal Register for publication, is enclosed.

Since ly,

Enclosure:

Notice of Extension Harold R. Oenton, Director Office of Nuclear Reactor Regulation cc w/encl:

See next page

J

Mr. Donald P. Disc

'C:

Eugene B. Thomas, Jr., Esquire

LeBoeuf, Lamb, Leiby 8 MacRae 1333 New Hampshire

Avenue, N.

W.

Suite 1100 Washington, D. C.

20036 State University College at Oswego Penfield Library - Documents

Oswego, New York 13T26

'r.

Joseph J.

Sunser, Manager System Security Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Resident Inspector c/o U.S.

NRC P. 0., Box 126

Lycoming, New York 13093 (Security matters only)

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