PHIVOLCS analyzes possible hazards of Bataan Nuclear Power Plant

admin   •   December 7, 2016   •   17755

Bataan Nuclear Power Plant.

Bataan Nuclear Power Plant.

 

Despite the seemingly precarious location of Bataan Nuclear Power Plant at the southwest slope of Mt. Natib, the Philippine Institute of Volcanology and Seismology (PHIVOLCS) said the possibility of another eruption is low.

This is based on the charcoal deposit that they have tested which indicated that the last eruption was 27,000 years ago.

“Nag-try na kaming i-map out ‘yung mga deposito, tiningnan ‘yung mga bata. Masyadong makapal. Lumang-luma ‘yung mga deposito na nakita ng ating mga geologist at kung io-operate ‘yan, kailangang maglagay ka ng mga sensors na pang-monitor ng earthquake activity kung sakali man,” PHIVOLCS Director Renato Solidum said.

(We tried to map out the deposits and our geologists have seen that the deposits are too thick and old and if the [BNPP] will be opened for operation, sensors should be installed to monitor earthquake activity just in case.)

The plant is also less likely to be affected by a tsunami because it is located 18 meters above the shore while the possible height of a tsunami that may hit the area is only up to 8 meters.

PHIVOLCS also found no fault line under the nuclear plant and the nearest is the Iba fault which is 60km away.

But even if this fault will move, including other faults like Manila trench, Philippine fault and West Valley fault, it can withstand the intensity if the plant’s design was strictly followed.

“Assuming na maayos ‘yung pagkagawa ng planta, ‘yung disenyo nga ay mas mataas pa sa inaasahang paglindol,” Solidum said.

(Assuming that the plant is well constructed, it is designed to withstand an expected intensity of a quake.)

Meanwhile, the Philippine Nuclear Research Institute (PNRI) said, it would take 5 years to revive the plant to operating level.

READ: Group fears $1-billion cost to revive Bataan Nuclear Power Plant will be put on consumers’ tab

The PNRI is the regulatory body that will ensure the safety of a nuclear plant’s operation based on set standards.

They said that location and structure are important considerations since its last submitted safety analysis report was way back in the 70’s.

“Acceptable naman ‘yung kanilang study na ‘yun (That study was acceptable). But that was at that time the 1970’s. So, if there is new evidence, there are new studies then we have to look at it,” said PNRI Nuclear Regulatory Division chief Teofilo Leonin, Jr.

The 1990 earthquake did not damage the plant even when Mt. Pinatubo erupted.

Nuclear plants with the same feature as the BNPP are still operating in Korea, Brazil and Yugoslavia. — Rey Pelayo | UNTV News & Rescue

Mt. Kanlaon possible to generate a major eruption – PHIVOLCS

Marje Pelayo   •   June 24, 2020

MANILA, Philippines — Mount Kanlaon in Negros Island is one of the most active volcanoes in the country similar to Mt. Pinatubo in Zambales, Mt. Mayon in Albay, Mt. Bulusan in Sorsogon, and Mt. Hibok-Hibok in Camiguin Island. 

Based on the observation of the Philippine Institute of Volcanology and Seismology (PHIVOLCS), the volcano has recorded abnormal activities especially last Sunday (June 21) and Monday (June 22).

Earthquakes have been felt as the volcano spewed ashes.

Department of Science and Technology (DOST) Undersecretary and PHIVOLCS OIC Renato Solidum explained these activities may be attributed to an existing fault.

They are now observing if the tremors will move under the summit.

“Itong pagkilos ng fault ay posibleng sanhi dahil sa pag pressurize ng lugar sa Kanlaon volcano ng hydrothermal fluids o pagpapakulo ng tubig o di kaya ay mas malalim pang magmatic activity,” Solidum noted.

Most of the Kanlaon’s explosions were phreatic, the agency observed.

Based on studies of rock samples from the volcano, its last lava episode was in the early 1900’s.

In the 1996 eruption, three persons who went up the volcano died.

Usec. Solidum said Mt. Kanlaon is not comparable with the Taal Volcano when it comes to activities, though a major eruption is possible.

Alert Level 1 has been raised over Mt Kanlaon since March this year.

“Kung ang tanong mo ay mabilis yung escalation, wala tayong nakikitang ganung history sa Kanlaon based on record history (We didn’t have any record of rapid escalation based on Kanlaon’s record in history),” Solidum said. 

“Pero yung posibilidad ng magkaroon ng mas malakas na eruption ay nandoon katulad ng Mayon Volcano; not Taal Volcano, hindi naman sila pareho ng setting (But there is the possibility of a major eruption like with Mount Mayon, but unlike Taal Volcano. Their settings are different),” he added.

PHIVOLCS warned that entering the four-kilometer permanent danger zone is strictly prohibited. MNP (with reports from Rey Pelayo)

Mga residente sa La Carlota City sa Negros, pinaghahanda na sa gitna ng pag-aalboroto ng Mt. Kanlaon

Robie de Guzman   •   June 24, 2020

Inihahanda na ng pamahalaan ng La Carlota City sa Negros Occidental ang disaster management plan na ipatutupad sakaling lumala ang ipinakikitang abnormalidad ng Mount Kanlaon.

Ayon kay La Carlota City Mayor Rex Jalando-on, nakapaloob sa kanilang plano ang pagtukoy sa mga barangay na lubos na maapektuhan at kailangang ilikas sakaling sumabog ang bulkan o kaya ay mas tumindi pa ang nararanasang pagyanig sa paligid ng bulkan.

Nakapaloob rin sa disaster management plan ang gagamiting logistics, transportation at available resources, pati na ang positioning ng food packs at mga lugar na maaaring gamiting temporary shelter ng mga ililikas na residente.

Tiniyak rin ni Jalando-on na mayroong P10 milyong quick response fund na maaaring gamitin ang lokal na pamahalaan.

Nagsasagawa na rin sila ng kampanya upang paalalahanan ang mga residente na maghanda at maging alerto sa gitna ng nararanasang pagyanig sa kanilang lungsod.

May gagawin ring drill upang malaman ng mga residente ang mga dapat gawin kapag nakaranas ng malakas na lindol o kaya ay sumabog ang bulkan.

Sa ulat ng Philippine Institute of Volcanology and Seismology (PHIVOLCS) Martes ng umaga, nasa 104 volcanic-tectonic earthquakes ang naitala sa Mount Kanlaon.

Bahagya ring humina ang inilalabas na puting usok ng bulkan na umabot sa taas na 300 metro.

Iniulat rin ng PHIVOLCS ang patuloy na deflation sa ibabang bahagi ng bulkan at inflation o paglobo naman sa gitnang dalisdis na nangangahulugan umano ng hydrothermal o magmatic activity sa ilalim ng lupa.

Muli ring nagpa-alala ang ahensiya na nasa alert level 1 ang Mount Kanlaon na ang ibig sabihin ay nagpapakita ito ng abnormal na aktibidad at nasa “period of unrest.”

Naka-deklarang permanent danger zone ang four-kilometer radius ng bulkan at ipinagbabawal ang pagpasok rito ng mga tao.

Sakop naman ng eight-kilometer radius ng bulkan ang mga Barangay ng Ara-ala at Yubo kaya’t mahigpit itong binabantayan ng lokal na pamahalaan. – RRD (mula sa ulat ni Correspondent Lalaine Moreno)

Phivolcs lowers Taal Volcano alert to level 1

UNTV News   •   March 19, 2020

MANILA, Philippines – The Philippine Institute of Volcanology and Seismology (Phivolcs) on Thursday said it has downgraded the alert on Taal Volcano to level 1 following the decrease in volcanic quakes and surface activity at the main crater.

In its bulletin, Phivolcs said the Taal Volcano’s condition in the succeeding four weeks after its alert was lowered to level 2, has been characterized by low-level volcanic earthquake activity, stabilizing ground deformation of the Taal Caldera and the Taal Volcano Island edifices, and weak surface activity at the Main Crater and the Daang Kastila fissure.

“DOST-PHIVOLCS is lowering the alert status of Taal Volcano from Alert Level 2 to Alert Level 1 to reflect the overall decreasing trend in the level of monitoring parameters,” its bulletin reads.

State volcanologists said that alert level 1 means that the volcano is still in “abnormal condition,” and that this “should not be interpreted that unrest has ceased or that the threat of an eruption has disappeared.”

Under alert level 1, sudden steam-driven or phreatic explosions, volcanic earthquakes, minor ashfall and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within the Taal Volcano Island.

The alert level may be raised back to alert level 2 “should pronounced change in monitored parameters forewarn of renewed unrest,” Phivolcs said.

The agency reminded residents that entry to Taal’s permanent danger zone, especially the vicinities of the Main Crater and the Daang Kastila fissure, remains strictly prohibited. 

The Taal Volcano was placed under alert level 4 when it spewed ash on January 12 which sent thousands of residents to temporary shelters and disrupted businesses in surrounding areas.

It was later lowered to alert level 2 several weeks later due to decreased unrest. — ROBIE DE GUZMAN

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